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35% Off Online Orders of Select Hard Parts. Enter Promo Code MMJ35 in Cart.

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Receive Up To 35% Off Your Online Purchase Of Select Parts And Accessories

Use promotional codes MMJ35 (35% Off), MMJ20 (20% Off) or MMJ15 (15% Off) at checkout to receive the online discount on qualifying products.

Receive 10% Off Wagner branded brake parts with your online purchase. Use promotional code: WAGNER10.

Receive 10% Off Select Champion branded products with your online purchase. Use promotional code: CHAMP10.

Receive 10% Off Select FelPro branded products with your online purchase. Use promotional code: FELPRO10.

Offers not valid in combination with any other discounts, promotions or items already on sale. Not valid on gift cards, special orders, installed service merchandise, commercial or fleet purchases. Those products that are included in these offers will be displayed in product search results and product detail pages. Excludes select products, brands and MAP priced items. For full category inclusions and disclaimers, see details here. Valid online until 11:59 PM EST on 12/06/17.

Free Shipping on Orders Over $50 or in-store pickup
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Receive 10% Off Wagner branded brake parts with your online purchase. Use promotional code: WAGNER10.

Receive 10% Off Select Champion branded products with your online purchase. Use promotional code: CHAMP10.

Receive 10% Off Select FelPro branded products with your online purchase. Use promotional code: FELPRO10.


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GLOSSARY
A

A/C
The cooling and dehumidification of a vehicles cabin air. Short for Air Conditioning.

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A/C

A/C Accumulator
A component used in a fixed-orifice tube system that protects the compressor from excess liquid refrigerant by means of desiccants, or the drying agents that remove moisture from the refrigeration system.

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A/C Accumulater

A/C Compressor
An engine-driven pump in the air conditioning system that increases the pressure of the refrigerant.

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A/C Compressor

A/C Condenser
A tube-and-fin heat exchanger that is exposed to outside airflow. As refrigerant vapor flows through the tubes, it condenses to liquid and releases heat that the air stream carries away. The condenser is on the high side.

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A/C Condenser

A/C Driver
Integrated Computer Output Circuit for the air conditioning system.

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A/C Driver

A/C Gauge
A tool used for measuring the air conditioning system's atmospheric pressures.

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A/C Gauge

A/C High Side Fitting
Located on the discharge side, the high pressure line, contains a port for servicing and checking high side pressures.

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A/C High Side Fitting

A/C Hose
A hose used to carry refrigerant throughout the air conditioning system.

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A/C Hose

A/C Idler Pulleys
An adjustable pulley used to keep tension on the air conditioning drive belt.

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A/C Idler Pulleys

A/C Inline Filters
A device that removes contaminants from external air entering the ventilation system.

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A/C Inline Filters

A/C Leak
A leak in the air conditioning system that regulates cool air flow and temperature to the interior of your vehicle; usually a refrigerant leak.

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A/C Leak

A/C Leak Detection
A fluorescent dye that is added to the air conditioning system in order to track a leak.

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A/C Leak Detection

A/C Low Side Fitting
Located between the evaporator and compressor, the lower pressure line, which is the suction side, contains a port for servicing and checking low side pressures.

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A/C Low Side Fitting

A/C O-Ring
A round rubber-like ring used to seal particular components of the air conditioning system.

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A/C O-Ring

A/C Pipe
A tube that connects components within the air conditioning system.

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AC Pipe

A/C Power Module
A computer or module used in order to switch the A/C system on and off.

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A/C Power Module

A/C Receiver
A component of the air conditioning system, also known as the receiver drier, containing desiccants that remove moisture

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A/C Receiver

A/C Valve Core
A removable stem inside the high and low side fittings that holds pressure for the air conditioning system.

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A/C Valve Core

Absorbed Glass Mat (AGM)
AGM is an advanced battery technology that allows the electrolyte (acid) to be uniformly distributed across the battery plate active material, allowing the battery to tolerate repeated deep discharges and provide an overall longer service life. AGM batteries are safer because there is no free acid to spill and they are highly resistant to failure from vibration.

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Absorbed Glass Mat (AGM)

Absorption Charge
Many automatic battery charges will charge a battery in stages, beginning with the initial or bulk charge phase, which brings the battery to about 3/4 of a full charge. During the Absorption charge phase, the charger reduces the charge amperage but holds the voltage at a relatively high set point of around 14.5 volts DC. A final maintain or float phase follows, whereby the battery is retained in a fully charged condition at about 13.5 volts.

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Absorption Charge

ABS Speed Sensor
(Also called a wheel speed sensor) Used to monitor the speed of the wheels and send the information to the ABS computer, so that during an emergency stop the wheels don't lock up.

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ABS Speed Sensor

Active Material
Also known as paste, active plate material is an absorbent lead-based substance that coats the plates and converts chemical energy to electrical energy (current) within the battery.

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Active Material

Accessory Relay
Accessory relays are installed in vehicles to reduce the risk of overloading switches while installing auxiliary lighting, electronics, or adding horns.

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Accessory Relay

Acrylic Lacquers
From late 1950s to 1980s, acrylic lacquer was the most sought-after automobile paint and it was mostly on luxury and expensive vehicles like Rolls Royce. If you want the absolute highest possible gloss or shine on your vehicle, acrylic lacquer paint is the best choice.

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Acrylic Lacquers

Adhesive
A substance, such as glue, when applied to surfaces binds them together. Adhesives can be made from substances such as epoxy, resin, or gelatin.

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Adhesive

Adjusting Sleeve
Located at the end of the tie rod; it is a small cylinder that allows the length of the tie rod to be adjusted, making changes in the toe-in and toe-out.

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Adjusting Sleeve

Air Cleaner Assembly
Provides a tight seal to keep out moisture and debris, helping to protect the air filter. It ensures clean air passes through the engine.

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Air Cleaner Assembly

Air Compressor
A device that forces air into a storage tank, increasing the pressure. That pressurized air can be used to clean parts, fill tires, or provide power to pneumatic tools.

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Air Compressor

Air Conditioning
The system that regulates cool air flow and temperature to the interior of your vehicle.

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Air Conditioning

Air Conditioning Compressor Bypass Pulley
Used to keep your original serpentine belt in place when the A/C compressor has gone bad, without replacing the costly A/C compressor. The A/C compressor bypass pulley is installed in the A/C compressor's spot on the serpentine belt's path and spins freely, allowing the serpentine belt to continue to run the other necessary parts and bypass the bad one.

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Air Conditioning Compressor Bypass Pulley

Air Conditioning Compressor Clutch
Controls the operation of the air conditioning compressor, which pressurizes and pumps the refrigerant through the A/C system.

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Air Conditioning Compressor Clutch

Air Conditioning System
The system that regulates cool air flow and temperature to the interior of your vehicle.

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Air Conditioning System

Air Filter
Made of fibrous material for the air to pass through. The air filter removes particles such as dust, pollen, and mold from the air. This cleans the air before it enters the needed systems.

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Air Filter

Air Intake Hose
Connects the intake manifold to the air filter box and improves the flow of air to the engine.

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Air Intake Hose

Air/Fuel Ratio Gauge
Used to make sure that the right amount of fuel and air is mixed together to keep the engine working as efficiently and cleanly as possible. Too much fuel in the mixture causes high emissions. Too much air causes the performance of the vehicle to suffer and can cause engine damage.

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Air/Fuel Ratio Gauge

Air Shock
A suspension system that uses air pressure as its spring source.

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Air Shock

Air Suspension
Air suspension is a type of suspension engineered by an electrical or engine driven air pump or compressor. This pump pressurizes the air, using compressed air as a spring.

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Air Suspension

Air Suspension Kit
A suspension system that uses contained compressed air for vehicle springing. The air suspension kit is used to restore vehicle’s suspension system that the air suspension is a type of vehicle suspension powered by an electric or engine driven air pump or compressor.

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Air Suspension Kit

Alignment
When referring to wheel alignment, it is the proper adjustment of a car's front or rear suspension for camber, toe, caster, and ride height.

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Alignment

Alignment Bolt
Various bolts types used on the vehicles chassis system used to make varying degrees of adjustment for caster, camber or toe.

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Alignment Bolt

Alignment Shim
Metal or plastic spacers used in the alignment process to alter camber, caster and/or toe. On rear-wheel drive applications, shims may be added to or removed from stacks of shims on the front control arms to change camber and/or caster. On front-wheel drive applications, partial shims or full contact shims may be positioned behind the rear axle spindle to vary rear toe and/or camber. Camber shims are also available for 4x4 axle applications. Some shims are adjustable or can be indexed various ways to provide incremental alignment corrections.

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Alignment Shim

All Wheel Drive
A vehicle transmission system that delivers power to all four wheels at the same time.

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All Wheel Drive

Alternating Current
(AC) An electric current that first flows one way in the circuit and then the other at regularly recurring intervals. This is the type used in homes. It contrasts with direct current. It is also the type of current produced by a vehicle's alternator. Since the rest of the vehicle uses direct current, the current coming from the alternator must be changed by the rectifier.

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Alternating Current

Alternator
An alternator is an electrical generating device that produces an alternating current (AC). In transportation applications, the alternator uses diode rectification to transform the AC voltage produced be the winding.

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Alternator

Alternator Relay
(Also called an alternator fuse) The alternator relay is placed between the battery and the alternator to regulate and protect both parts from a spike in amperage that that could harm either of them.

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Alternator Relay

Amp Hour
Amp-Hour is a measure of electrical charge and more specifically the amount of electrical charge potential that can be transferred from a battery in a period of one hour.

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Amp Hour

Anchors
A fastener used to restrict the motion of a part, or secure one part of a structure to another.

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Anchors

Analog Computer
An analog computer is a form of computer that uses the continuously changeable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved.

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Analog Computer

Angular Sensor
A type of sensor that replaced a mechanical part.

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Angular Sensor

Antifreeze
A liquid, that is used to lower the freezing point of water in the radiator of a vehicle.

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Antifreeze

Articulated Steering
Articulated steering is a system by which a four-wheel drive vehicle is split into front and rear halves which are connected by a vertical hinge. The front and rear halves are connected with one or more hydraulic cylinders that change the angle between the halves, including the front and rear axles and wheels, thus steering the vehicle.

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Articulated Steering

ATV Cover
Fabric that provides all weather protection to your ATV and protects against harmful pollutants and UV rays.

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ATV Cover

Auto Detailing
Exterior detailing involves cleaning, and either restoring or exceeding the original condition of the surface of the car's finish (usually a paint with a glossy finish), chrome trim, windows, wheels, and tires, as well as other visible components on a vehicle's exterior.

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Auto Detailing

Automotive Paint
A liquid mixture, usually of a solid pigment in a liquid vehicle, used as a decorative or protective coating.

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Automotive Paint

Axle Flange Gaskets
Axle drive flange gaskets are designed to fit between your axle tube housing end and the bearing retainer plates. They are made from quality materials and are available for most rear-wheel drive applications.

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Axle Flange Gaskets

Axle Flange
An axle flange is the part of an axle that has the wheel studs coming through it in order to mount a wheel to the axle.

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Axle Flange
B

Backing Plate Gaskets
Backing plate gaskets protect your car's rear axle and keep water and debris out of it. It also helps prevent metal-to-metal contact and seal off any gaps between the metal surfaces.

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Backing Plate Gaskets

Balance Shaft Belt
Attaches to both the crank shaft and the balance shaft. It moves the balance shaft, which helps reduce vibration in the motor.

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Balance Shaft Belt

Ball Joint
Ball joints act as the pivot point for suspension articulation. Ball joints are designed to allow the suspension to move independently without interfering with the action of the wheel. This independent motion isolates the movement of the car or truck wheel from the chassis of the vehicle, creating a smooth and quiet ride.

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Ball Joint

Ball Mount
A removable platform, that attaches with a pin or a bar, to the trailer hitch. The trailer ball is then fastened to the flat portion of the platform. Offered in a variety in heights to accommodate the towing vehicle.

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Ball Mount

Ballast Resistor
A resistor inserted into a circuit to swamp or compensate changes, e.g., those arising through temperature fluctuations. One similarly used to swamp the negative resistance of an arc or gas discharge. Also called ballast tube. A resistor constructed of a special type wire, the properties of which tend to increase or decrease the voltage in direct proportion to the heat of the wire.

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Ballast Resistor

Band Clamp
Also called a Web Clamp. A type of clamp that is used to attach things that are not parallel, where there are multiple surfaces to attach, or where pressure is needed from multiple directions at the same time.

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Band Clamp

Banjo Bolts
A hollow bolt to allow fluid to flow through it; used for fuel, oil, or in hydraulic systems. Pipes or flexible hoses can be connected to it.

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Banjo Bolts

Basecoat Paints
A liquid mixture, usually of a solid pigment in a liquid vehicle, used as a decorative or protective coating.

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Basecoat Paints

Battery
A battery is a vessel containing one or more cells, used for the storage and transfer of electrical energy.

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Battery

Battery Backup
A source to provide power or charge to a system with the primary power source is unavailable. Can be used to charge a variety of electronics.

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Battery Backup

Battery Cable
Cable that connects from the battery to the starter. A compact grouping of copper strands inside a PVC jacket to protect the wires from weather, oil, heat, and abrasion.

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Battery Cable

Battery Charger
A device used to put energy (charge) back into a battery by forcing an electric current through it.

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Battery Charger

Battery Discharge
Battery discharge is the amount of electrical energy drawn from a battery over a specified period of time and for which immediate replenishment does not occur.

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Battery Discharge

Battery Life
Battery life is the amount of time, generally measured in months, that a battery will perform within the design specification of the product. Useful automotive battery life averages about four years.

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Battery Life

Battery Maintainer
Used to make sure a battery will still start after not being used for a long time. It uses a trickle charge approach to help the battery to keep a charge while sitting unused.

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Battery Maintainer

Battery Plates
Battery plates are lead-based grids that are stacked in an alternating negative-positive-negative fashion inside each battery cell. Plates in a conventional lead-acid battery are interconnected by a metal strap, allowing current to be conducted across cells and between the positive and negative terminals.

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Battery Plates

Battery Shelf Life
Battery shelf life is the amount of time, generally measured in months, that a battery is considered serviceable in storage. Generally, a battery will discharge at a rate of several percent per month. Left to discharge without boosting, battery shelf life is typically about 6 months and upwards of one year if maintained with a battery charger.

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Battery Shelf Life

Battery Solution (Electrolyte)
Battery electrolyte is usually a mixture of sulfuric acid and water and acts to conduct the electrical charge across the plates within a cell. Electrolyte level must be maintained within a battery so as not to allow the active material to dry.

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Battery Solution (Electrolyte)

Battery Terminal
Batteries have two connection points called terminals. One of the terminals is positively charged, and one is negatively charged; when connected a circuit is formed and electricity can flow through it to run the vehicle.

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Battery Terminal

Battery Testing
Battery testing is a process by which the condition of a battery is verified using any of a variety of test equipment ranging from a simple voltmeter to highly accurate capacitive and load testing. Battery testing is critical to avoid impending battery failure during operation and possible damage to charging system components.

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Battery Testing

Battery Vents
Battery vents are opening typically located in the filler caps or cap manifold of a battery. Vents are necessary to evacuate excessive hydrogen gas that may have built up inside the battery during charging. Without venting, dangerous vaper pressure may be allowed to build inside the battery.

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Battery Vents

Bedliner
Products that protect the truck bed from damage caused by hauling materials or weather. Can also provide a non-slip surface to make moving cargo safer. Bedliners come in two styles: Drop-in and Spray-in.

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Bedliner

Bellcrank
A bell crank is a type of crank that changes motion through an angle. The angle can be any angle from 0 to 360 degrees, although 90 degrees and 180 degrees are common.

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Bellcrank

Belt Tensioner
Tensioner is a device that applies a force to an object to maintain it in tension. Often the amount of force is adjustable. There are tensioners for applying a tensioning force to drive belts and chains, fibers, and bolts.

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Belt Tensioner

Blind Spot Mirror
A small, secondary mirror that can be attached to a side mirror for better visibility of vehicles and objects in a driver's blind spot.

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Blind Spot Mirror

Block Kit
Blocks/spacers used to lift the body of the vehicle higher onto the frame without altering the suspension. The ground clearance remains the same but the lift allows for bigger tires and wheels.

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Block Kit

Blower Motor
The motor that regulates the fan in the heating and air conditioning system.

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Blower Motor

Blower Wheel
The fan that propels air in the heating and air conditioning system.

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Blower Wheel

Bluetooth
Wireless connection between mobile phones or computers, and other electronic devices.

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Bluetooth

Body Repair
Service technicians fix damaged bodies and body parts of automotive vehicles such as cars, vans, trucks, buses, campers, and trailers. This can also involve pounding out small dents with a hammer, pick hammer, or punch.

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Car Covers

Body Filler
A semisolid putty or paste that hardens on drying, used to fill pores, cracks, or holes in the vehicle surfaces before sanding and finishing.

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Body Filler

Body Lift Kit
Utilizes blocks and spacers to lift the body higher onto the frame of the vehicle without altering the suspension. The ground clearance and steering remains unchanged.

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Body Lift Kit

Body Side Molding
Moldings on the car body that enhance the attractiveness and protects the body from scratches and weather conditions.

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Body Side Molding

Boost Gauge
Indicates the air pressure in the manifold, or turbocharger, of an engine. They are normally mounted in the radio slot or in the dashboard on the driver's side.

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Boost Gauge

Brake Calipers
Metal devices on disc brakes which house the brake pads. They squeeze the brake pads onto the discs when you hit the brakes.

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Brake Calipers

Brake Hose
Carries brake fluid from the master cylinder to the brake calipers or wheel cylinders. When the brake pedal is depressed, brake fluid presses against the rotors causing the vehicle to slow down.

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Brake Hose

Brake Hose Lock
Used to hold the brake hose in place by connecting it to the inside vehicle body.

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Brake Hose Lock

Brake Kit
Brake kits can be a combination of different setups to do the job of changing your vehicle's brakes, instead of buying each component separately. This can alleviate the fear of getting parts that are mismatched. Most common is a kit that includes the needed rotors and pads for either the front or rear of the vehicle, though they can also include calipers as well.

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Brake Kit

Brake Pad
A thin block of material that presses against a vehicle's brake disc or rotor creating friction causing the wheel to stop.

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Brake Pad

Brake Pedal Lock
A lock that attaches to the brake pedal and restricts use the brake pedal; this makes the vehicle inoperable if properly attached.

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Brake Pedal Lock

Brake Shoes
A lock that attaches to the brake pedal and restricts use the brake pedal; this makes the vehicle inoperable if properly attached.

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Brake Shoes

Breakerless Ignition
An ignition system using electronic switching devices to assist or eliminate the mechanical parts.

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Breakerless Ignition

Breakers
Breathers are a part of your vehicles emission system. Breathers allow air movement between the atmosphere and the component it is installed in and relieves heat in the engine to increase performance.

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Breakers

Breather
Used to allow fresh air into the crankcase while trapping oil mist and contaminants from being drawn in.

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Breather

Bud Shield
 An accessory for vehicles that attaches to the front end of the hood. It create a slipstream effect; redirecting insects and debris up and away from the windshield to help increase the driver’s visibility.

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Bud Shield

Bulb
 Light bulbs that perform multiple lighting tasks inside and outside your vehicle. Examples include headlights, brake lights, and interior dome lights.

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Bulb

Bulk Charge
Bulk charge is considered to be the first stage in automatic battery charging. This occurs when the battery charger applies a powerful amperage and voltage that is above the nominal to the battery. This first stage is responsible for about 3/4 of the battery charge.

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Bulk Charge

Bumper
 A metal or rubber bar across the front or back of a motor vehicle to reduce damage in a collision.

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Bumper

Bumper Paint
Designed to renew and revitalize your worn-out chrome or plastic bumper trims, giving them a like new shine and defending them against future wear and tear.

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Bumper Paint

Bushing
Bushings isolate and reduce transmitted noise, road shock, and vibration.

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Bushing
C

Cabin Air Filter
 Cleans the air prior to entering the interior of the vehicle. The cabin air filter removes air dust, pollen, mold, and smells from the air by passing through fibrous material.

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Cabin Air Filter

Cable Hook Up
Cable hook up as applies to vehicle batteries refers to the polarity of the battery cable or jumper cable with respect to that of the host battery. The positive battery cable is to be attached to the positive (generally labeled +) battery post, and the negative cable is to be attached to the negative (generally labeled -) battery post.

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Cable Hook Up

Cable Lock
Cable locks can be used for a variety of transportation and garage security purposes like car cover locking, bicycle security, tool locking, and cargo protection. Materials vary and can include woven steel, plastics, and rubbers.

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Cable Lock

Caliper Bracket
 Part of the brake system, it attaches to the caliper which holds the brake pads within.

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Caliper Bracket

Caliper Cover
Caliper covers are placed over the brake calipers to show personal style through your wheels instead of the plain caliper.

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Caliper Cover

Caliper Damper
 Part of the brake system, it attaches to the caliper which holds the brake pads within.

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Caliper Damper

Caliper Piston
 The pistons in brake calipers are responsible for the brake pads making contact with the brake discs and slowing the car. Pistons are found in both floating and fixed brake calipers.

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Caliper Piston

Cam
A stepped or curved eccentric wheel mounted on a rotating shaft. As a cam is turned, objects in contact with it are raised or lowered.

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Cam

Camber
A wheel alignment adjustment of the inward or outward tilt on the top of the wheel when viewed from the front of the vehicle. Correct camber improves handling and cuts tire wear.

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Camber

Camber Bolt
(Also called cam bolts) Camber bolts are used to offset the strut and the knuckle slightly from each other to adjust the camber.

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Camber Bolt

Camshaft
 A shaft with one or more cams attached to it that opens and closes the intake and exhaust valves at proper intervals in an engine.

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Camshaft

Camshaft Bearings
Camshaft bearings are a type of hydrodynamic bearing; they support and provide the rotation of the camshaft.

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Camshaft Bearings

Camshaft Position Sensor
Sets the ignition timing, and determines the engine speed, by deciding which cylinder is firing to create a coil firing sequence and synchronization.

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Camshaft Position Sensor

Canvas Car Cover
Made for indoor use and can help protect garage vehicles from dust and scratches.

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Canvas Car Cover

Capacitance Discharge
A type of ignition system. It can be either all-electronic or breaker point controlled.

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Capacitance Discharge

Capacitor/Condenser
Electrical device made of dry metal and dry insulation; used to store electrons.

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Capacitor/Condensor

Capacity Offset
Capacity offset refers to a correction factor programmed into many more sophisticated battery testers, chargers and maintainers. Simply stated, the ability of a battery to take and hold a charge is influenced by atmospheric temperature. The charge rate is corrected or offset according to the ambient temperature.

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Capacity Offset

Carburetor
 A device that mixes air with liquid fuel to supply it to an internal combustion engine.

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Carburetor

Cargo Bar
 A device that mixes air with liquid fuel to supply it to an internal combustion engine.

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Cargo Bar

Car Covers
A car cover protects your vehicle from dust, direct sunlight, tree sap and more.

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Car Covers

Car Detailing
Exterior detailing involves cleaning, and either restoring or exceeding the original condition of the surface of the car's finish (usually a paint with a glossy finish), chrome trim, windows, wheels, and tires, as well as other visible components on a vehicle's exterior.

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Car Covers

Car Wash
The washing of the exterior of an automobile with cleaning products.

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Car Covers

Car Wax
Car wax is used after washing and polishing to add a layer of shine to the car as well as a layer of protection. It is a type of paint sealant. If there is any dirt or stains on the paint, then the wax will seal it on the car. Wax will protect your car from UV rays and will prevent pollution and other dust from damaging your car. It also minimizes the moisture that comes into contact with the paint, as water causes corrosion.

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Car Covers

Caster
A wheel alignment adjustment that positions the wheels like the casters on a chair or shopping cart, so the tires follow naturally in a forward straight line.

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Caster

Catalytic Converter
The catalytic converter is a vital part of your vehicle emissions control system. Its job is to reduce toxic air by converting harmful pollutants into less harmful emissions, such as water, carbon dioxide and nitrogen.

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Catalytic Converter

Cathode
The negatively charged cell from which current flows in an electrolytic cell.

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Cathode

CB
 The Citizen's Band (CB) Radio, two-way personal radio service commonly used by truckers and motorists to communicate with others within close proximity while driving. 

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CB

Cell Change
A battery cell is a container within the battery case that holds a prescribed number of positive and negative battery plates, their separators and the electrolyte. In a conventional 12 volt battery, there are 6 cells, each producing just over 2 volts. Each cell within a battery is connected in series via a metal strap.

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Cell

Center Links
 Also called the relay rod, the center link on a car connects the pitman arm and idler arm in the vehicle's suspension.

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Center Links

Chameleon Paints
Paints that provide an illusion of sparkling or changing colors.

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Chameleon Paints

Chamois
 A soft leather or cotton cloth used to shine and dry a car after washing and waxing.

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Chamois

Charge Control
Charge control for batteries is the regulation of charge current and / or voltage used to charge or maintain a battery.

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Charge Control

Charging Cycle
Charging cycle is a program or series of programs used by battery chargers for replenishing a discharged battery.

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Charging Cycle

Chassis
Generally, chassis refers to the frame, engine, front and rear axles, springs, steering system, and fuel tank .

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Chassis

Circuit
 A path between two or more points along which an electrical current can be carried.

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Circuit

Circuit Breaker
 A device that stops the flow of current in an electric circuit as a safety measure if there is a surge.

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Circuit Breaker

Clamp
A mechanical coupling used to join and grip mating parts.

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Clamp

Class 1 Hitch
 Usually mounted to the bumper of vehicle frame, and are weight carrying rated up to 2,000 lbs. gross trailer weight (GTW).

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Class 1 Hitch

Class 2 Hitch
 Usually mounted to the bumper of vehicle frame, and are weight carrying rated up to 2,000 lbs. gross trailer weight (GTW).

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Class 2 Hitch

Class 3 Hitch
 Usually mounted to the bumper of vehicle frame, and are weight carrying rated up to 2,000 lbs. gross trailer weight (GTW).

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Class 3 Hitch

Class 4 Hitch
 Usually mounted to the bumper of vehicle frame, and are weight carrying rated up to 2,000 lbs. gross trailer weight (GTW).

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Class 4 Hitch

Clear Coat Finishes
An automotive painting technique in which a coating of clear lacquer or other synthetic liquid is applied over the base color to enhance the shine and durability of the paint.

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Clear Coat Finishes

Clear Coat Paint
Clear coat paint, or a clear coat finish as it is commonly referred to, is paint that does not contain any pigment or color.

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Clear Coat Paint

Clutch Flywheel
 The flywheel is a disc that is attached to the crankshaft in the engine on a manual transmission vehicle. It provides one of the friction surfaces for the clutch.

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Clutch Flywheel

Clutch
 The flywheel is a disc that is attached to the crankshaft in the engine on a manual transmission vehicle. It provides one of the friction surfaces for the clutch.

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Clutch

Coachwork
Coachwork is the body of a motor vehicle. The term is usually reserved for bodies built on a separate chassis, rather than being of unitary or monologue construction.

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Coachwork

Code Scanner
 An electronic tool that interacts with the vehicle control modules to diagnose or reprogram issues found within them.

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Code Scanner

Coil Connector
The coil connector takes low voltage current from the engine control module and amplifies it into high voltage to be sent to the spark plugs during ignition.

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Coil Connector

Coil on Plug
A coil for each spark plug.

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Coil on Plug

Coil Primary
An alternating current in the primary side of the ignition coil.

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Coil Primary

Coil Spring
A suspension spring made from coiled wire having a cylindrical or conical outline.

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Coil Spring

Cold Cranking Amp
Cold cranking amps (CCA) is the amount of current that a battery can deliver at 0 degrees Fahrenheit. Specifically, it is the number of amps that a battery can deliver for a period of 30 seconds while maintaining a minimum of 1.2 volts per cell (7.2 volts for a 12 volt battery). CCA has been the generally accepted standard for battery power.

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Cold Cranking Amp

Collision Repair
Collision repair technicians fix damaged bodies and body parts of automotive vehicles such as cars, vans, trucks, buses, campers, and trailers.

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Car Covers

Combination Switch
Switch that allows you to operate two separate applications in your vehicle. An example is the switch that can control both headlights and windshield wipers.

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Combination Switch

Combination Valve
Configuration that includes a proportioning valve and a brake pressure differential switch. In disc/drum systems it also includes a metering valve. The proportioning valve is used to control the rear brakes. The brake pressure differential switch grounds and alerts if brake pressure is lost in either front or rear portion of the brake system. The metering valve is used to control the pressure going to the front wheels so that the brakes apply evenly between the front and back-end of the vehicle. The disc brakes in the front apply quicker then the rear drum brakes, so the metering valve is needed to prevent the car from nose diving.

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Combination Valve

Combustion Chamber
The volume of the space in the cylinder above the piston with the piston at top dead center (TDC) in the compression stroke. The head of the piston, the cylinder walls, and the head form the chamber. Combustion of the fuel-air mixture.

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Combustion Chamber

Compound
 A substance used to fill gaps or holes in surfaces or seal joints between surfaces.

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Compound

Compression Cycle
It is the squeezing of the fuel-air mixture in the cylinder of a spark-ignition engine or the squeezing of the air in a diesel engine. Compression makes the process of combustion more effective and increases engine efficiency.

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Compression Cycle

Compression Spring
 Traditionally a coil shape, used to provide resistance to any force trying to compress the spring.

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Compression Spring

Condensation
the collection of moisture removed from ambient air.

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Condensation

Condenser
 As part of the cooling system, it is where vapor is turned into liquid by the removal of heat. As part of the ignition, it is to reduce the spark at the contact points to prevent burning and damage to the points.

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Condenser

Connector
Automotive connectors are used to connect electrical wires at your vehicle's component level. They provide for single wire removal or replacements while providing sealing and protection from moisture and corrosion.

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Connector

Constant Current
Constant current is an older technology method for charging batteries. It is also known as trickle charging when the application is a small amount of current. Constant current means that the charge current does not change regardless of the batteries state of charge.

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Constant Current

Contact Breaker
A mechanical switch in the distributor with two metal Contact points (usually made of silver, platinum, or tungsten) that open and close. When the points are closed, energy is stored in the Primary windings of the Coil. When the breaker points open, this energy is transferred to the secondary windings of the coil and stepped up, resulting in a high voltage to fire the plugs.

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Contact Breaker

Control Arm
The primary function of a control arm is to provide the connection point between the body of the vehicle and wheel. This allows the wheel to move up and down while the body frame and passengers stay smooth and level. Key components that are normally found on a control arm include the control arm bushing and the ball joint.

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Control Arm

Conversion Gasket Set
The lower engine gasket set.

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Conversion Gasket Set

Constant-Velocity Axle
Used mostly in front-wheel and all-wheel drive vehicles, CV axles have two CV joints incorporated into them to provide flexible power to the wheels.

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Constant-Velocity Axle

Constant-Velocity Joint
Constant-velocity joints (also known as CV joints) let the drive shaft transmit power at constant speed, without building friction.

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Constant-Velocity Joint

Coolant Check Valve
Coolant check valves help maintain the right pressure in the cooling system. As the coolant warms and expands it creates pressure; the valve opens and lets the out the overflow coolant so the pressure isn't too much. Once the coolant returns to a safe temperature it creates a vacuum through the valve allowing it back into the system.

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Coolant Check Valve

Coolant Recovery Tank
A coolant recovery tank catches the overflow coolant that has expanded due to the engine's heat and cycles it back through the system after it has cooled to a lower temperature.

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Coolant Recovery Tank

Coolant Reservoir
Normally made of plastic, the coolant reservoir is mounted in the engine compartment, and is used to store the coolant for the engine.

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Coolant Reservoir

Coolant Temperature Sensor
Used to measure the temperature of the engine coolant, the sensor sends the results to the engine control unit to adjust the ignition timing and fuel injection.

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Coolant Temperature Sensor

Cooler
Normally made of plastic, the coolant reservoir is mounted in the engine compartment, and is used to store the coolant for the engine.

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Cooler

Corrosion
Corrosion, as pertains to batteries, is a chemical reaction that occurs both inside and outside the battery. Internally, the sulfuric acid electrolyte acts to corrode the plates over time, eventually reducing the strength and density of the plates. Externally, acid spillage or fumes acts to chemically corrode metals in contact or near the battery. Specifically, corrosion is commonly known to occur on the battery cable ends and cable wire.

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Corrosion

Covers
Battery covers are often specified by the original equipment vehicle manufacturer in order to insulate the battery from engine heat and/or protect adjacent components from the battery.

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Covers

Crab Steering
Crab steering is a special type of active four-wheel steering. It operates by steering all wheels in the same direction and at the same angle. Crab steering is used when the vehicle needs to proceed in a straight line but under an angle, or when the rear wheels may not follow the front wheel tracks.

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Crab Steering

Crank Angle Sensor
A detection device which picks up signals to locate the position of a part and sends the information to the ECU.

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Crank Angle Sensor

Cranking Amp
Cranking amps (CA) is the amount of current that a battery can deliver at 32 degrees Fahrenheit. Specifically, it is the number of amps that a battery can deliver for a period of 30 seconds while maintaining a minimum of 1.2 volts per cell (7.2 volts for a 12 volt battery). CA is often referred to as marine cranking amps.

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Cranking Amp

Crankcase
The lower section of the engine that supports the crankshaft, confined by the lower block casting and the oil pan.

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Crankcase

Crankcase Seal
Keeps the oil in the crankshaft from leaking out of the engine crankcase while it is rotating.

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Crankcase Seal

Cranking Amp
Cranking amps (CA) is the amount of current that a battery can deliver at 32 degrees Fahrenheit. Specifically, it is the number of amps that a battery can deliver for a period of 30 seconds while maintaining a minimum of 1.2 volts per cell (7.2 volts for a 12 volt battery). CA is often referred to as marine cranking amps.

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Cranking Amp

Crankshaft
A main rotating shaft running the length of the engine. The crankshaft is supported by main bearings. Portions of the shaft are offset to form throws to which the connecting rods are attached.

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Crankshaft

Cross Drill Rotor
Disc-shaped component that revolves with hub and wheel, with concentric holes drilled into them their main purpose is to release heat and gases so that brakes last longer and provide consistent stopping even after long time use.

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Cross Drill Rotor

Custom Fit Cover
Car cover that is designed to fit the exact make and model of your vehicle.

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Custom Fit Cover

CV Axle
(Also known as Constant Velocity Joint Axles) CV axles are part of the drivetrain. They send power from the transmission to the CV joint in wheels of the vehicle, which allow for flexibility while driving.

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CV Axle

CV Joint
(Also known as Constant Velocity Joint) CV joints are on the ends of the drive shafts. They deliver the torque from the transmission to the drive wheels at a constant speed, giving a flexibility while driving.

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CV Joint

Cycle Life
Cycle life is the amount of discharge and recharge cycles that a battery can tolerate before it fails to meet the design specifications of output. The depth of discharge are carefully controlled during determination of cycle life.

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Cycle Life

Cylinder
The round chamber or hole in the cylinder block that houses the pistons and where combustion takes place. Also called bore or barrel.

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Cylinder

Cylinder Head
The cover of a cylinder in an engine that allow the pistons to create pressure of the cylinders contents.

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Cylinder Head
D

Damper
A damper is a device that deadens, restrains, or depresses the impact of shock.

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Damper

Deep Cycle Battery
A deep cycle battery is a specific design that allows the battery to be deeply discharged and recharged many times without substantial degradation to performance or battery life. Typical applications for deep cycle batteries are marine trolling motor batteries, motor homes and campers and solar power systems.

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Deep Cycle Battery

De-Icer
Chemical mixture used during the winter to remove snow, ice, or frost from a vehicle's windshield and keep the contents of the washer fluid reservoir and hoses from freezing in cold weather.

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De-Icer

Desiccant
Drying agents that absorb and remove moisture from the air conditioning system.

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Desiccant

Diesel Engine Oil
Engine lubricant that is used specifically in diesel engines. Cannot be used in gasoline engines.

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Diesel Engine Oil

Diesel Exhaust Fluid
(Also called DEF) Diesel exhaust fluid is a solution that is used in diesel vehicles to lower the nitrogen oxides in the emissions from the engine.

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Diesel Exhaust Fluid

Differential
A differential is a device, usually using gears, which is connecting three shafts or chains, through which it transmits torque and rotation.

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Differential

Differential Cover
To protect the intricate moving parts of your differential, an aluminum differential cover is the perfect answer, adding an extra layer of protection to your vehicle's underside.

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Differential Cover

Differential Cover Gaskets
Differential gaskets seals the differential housing and protects the rear-end gears and axles from exposure to the elements.

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Differential Cover Gaskets

Differential Steering
Tracked vehicles such as bulldozers and tanks usually employ differential steering - that is, the tracks are made to move at different speeds or even in opposite directions, using clutches and brakes, to bring about a change of course or direction.

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Differential Steering

Digital Power Inverter
Electrical device that converts voltage from direct current (DC) to alternating current (AC).

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Digital Power Inverter

Dipstic
A rod for measuring the depth of oil a vehicle's engine.

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Dipstick

Direct Fit Catalytic Converter
Direct-fit catalytic converters exactly match the vehicle they purchased for with no modifications needed.  

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Direct Fit Catalytic Converter

Discharge Rate
The discharge rate is the amount of amperage drawn from a battery over a specified amount of time.

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Discharge Rate

Distributor
A unit in the ignition system designed to make and break the ignition Primary circuit and to distribute the resultant high voltage to the proper cylinder at the correct time.

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Control Arm

Distributor Cap
An insulated cover containing a central terminal or tower with a series (one per cylinder) of terminals or towers that are evenly spaced in a circular pattern around the central terminal or tower, the secondary voltage travels to the central terminal or tower where it is then channeled to one of the outer terminals or towers by the rotor. The cap also keeps dirt and moisture out of the distributor.

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Distributor Cap

Distributor Gear
A gear which works together with the camshaft gear to rotate the distributor shaft.

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Distributor Gear

Distributor Rotor
A component in the ignition system that carries a spark from the ignition coil to the distributor cap. 

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Distributor Rotor

Direct Ignition
A system where each spark plug has its own ignition coil, thus eliminating the need for a distributor.

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Direct Ignition

Door Cylinder Lock
A lock where the pins and tumblers are housed inside a cylinder. Cylinder locks can be changed without altering the bolt hardware.  

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Door Cylinder lock

Drag Link
In a vehicle's steering system the drag link converts rotary motion from a crank arm, to a second crank.  

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Drag Link

Drive Axle
The axle that is being driven by the engine. Depending on the vehicle, this could be the front or rear axle.

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Drive Axle

Driveshaft
A shaft that carries torque, through rotation, in an engine to the wheels.

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Driveshaft

Driving Lights
Forward facing lights on a vehicle that are on when the vehicle is, but the headlights are not. They are not intended for use alone at night.

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Driving Lights

Drum Brakes
A type of brake that stops a vehicles by using friction caused by shoes or pads pressing outward against a rotating cylinder called a brake drum.

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Drum Brakes

Dual Purpose Battery
A dual purpose battery typically refers to a unit that performs the function of both a starting and deep cycling battery. Many AGM batteries perform this dual function.

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Dual Purpose Battery

Dynamo
A British term for a generator producing direct current.

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Dynamo
E

ECM
Abbreviation for Electronic Control Module which is the master computer responsible for interpreting electrical signals sent by engine sensors and for activating automated engine components and processes accordingly in order to produce optimum performance.

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ECM

ECU
Electric power steering (EPS or EPAS) uses an electric motor to assist in steering the vehicle. Sensors detect the position and torque of the steering column, and a computer module applies assistive torque via the motor, which connects to either the steering gear or steering column.

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ECU

Electric Power Steering
Electric power steering (EPS or EPAS) uses an electric motor to assist in steering the vehicle. Sensors detect the position and torque of the steering column, and a computer module applies assistive torque via the motor, which connects to either the steering gear or steering column.

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Electric Power Steering

Electric Spark
An electric spark is a type of electrostatic discharge that occurs when an electric field creates an ionized electrically conductive channel in air producing a brief emission of light and sound. A spark is formed when the electric field strength exceeds the dielectric field strength of air.[1] This causes an increase in the number of free electrons and ions in the air, temporarily causing the air to become an electrical conductor through dielectric breakdown.

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Electric Spark

Electrolyte
Electrolyte is the fluid medium by which electrical energy is transferred between the positive and negative plates within a battery cell. Electrolyte is more commonly referred to as battery acid.

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Electrolyte

Electronic Ignition
An ignition system using electronic switching devices to assist or eliminate the mechanical breaker points.

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Electronic Ignition

Emission Solenoid
The emission solenoid, part of the EVAP system, is an electronic purge valve controlled by the engine computer to slowly open allowing some fuel vapor to be burned by the engine. When the engine is off the emission solenoid is closed.

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Emission Solenoid

Enamel Paints
Due to heavier body, these paints are harder for application. Enamel paints dry slowly as they have a heavy body. If filtered air supply doesn’t exist in working area, they may receive lint, dust or other imperfections. But due to same heavy body, they deliver excellent performance.

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Enamel Paints

Engine Air Box
An empty chamber on the inlet of engines that collects air from outside and gives it to the intake hoses of each cylinder.

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Engine Air Box

Engine Analyzer Tester
An electronic tool for basic automotive diagnostic and electrical testing found within the engine.

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Engine Analyzer Tester

Engine Mount
Engine mounts secure the engine and transmission to the frame of the vehicle and absorbs engine vibrations so passengers don't feel them inside the vehicle.

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Engine Mount

Engine Paint
An electronic tool for basic automotive diagnostic and electrical testing found within the engine.

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Engine Paint

Engine Tensioner
Most often an enamel paint, that has a hard, glossy finish and provides high heat resistance needed for an engine.

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Engine Tensioner

Engine Management System
(EMS) An electronic engine control system which covers at least the functioning of the fuel injection and ignition, but may also include emission controls and self-diagnostics.

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Engine Management System

Equalizer
An equalizer is used to adjust the amplitude (volume) of audio signals at particular frequencies.

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Equalizer

Evacuate
Using a vacuum pump to remove all atmospheric air and moisture from inside the air conditioning system.

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Evacuate

Evaporation
The act of changing a liquid to a vapor.

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Evaporation

Evaporator
A component of the air conditioning system that removes heat from the air located within the evaporator housing.

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Evaporator

Exhaust Adapter
An equalizer is used to adjust the amplitude (volume) of audio signals at particular frequencies.

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Exhaust Adapter

Exhaust Clamp
Similar to an exhaust adapter, an exhaust clamp holds two pieces of pipe together.

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Exhaust Clamp

Exhaust Gas Temperature Gauge
(Also called an EGT gauge) The EGT gauge is used to monitor the exhaust gas temperature of an engine. Using one can give the driver an idea of the car's air-fuel ratio.

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Exhaust Gas Temperature Gauge

Exhaust Hanger
Also known as muffler straps. Exhaust hangers are made of rubber, or a combination of rubber and steel, that attach to the bottom of the vehicle to hold the muffler in place.

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Exhaust Hanger

Exhaust Header
Exhaust headers allow the engine to push gases out of the cylinders, removing the manifold's back pressure.

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Exhaust Header

Exhaust Manifold
Collects the exhaust gasses from multiple cylinders into one pipe to be delivered to the exhaust pipe.

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Exhaust Manifold

Exhaust Pipe
Piping used to lead exhaust fumes away from the engine and out the muffler.

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Exhaust Pipe

Exhaust Resonators
Exhaust resonators are used in place of a muffler. They cancel out specific sound frequency ranges to create a custom sound for your vehicle's exhaust system and typically remove the ranges in exhaust noise that would be compared to a droning or buzzing sound.

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Exhaust Resonators

Exhaust Turndown
Exhaust turndowns redirect exhaust flow exiting the muffler making them louder, and giving a customized look.

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Exhaust Turndown

Expansion Plug
(Commonly called frost plugs, freeze plugs, or core plugs.) Expansion plugs are used to prevent the engine block from cracking in freezing situations. If the water in the engine freezes and expands, the expansion plug "pops out" to prevent damage to the engine.

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Expansion Plug

Expansion Valve
A term used for the thermal expansion valve.

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Expansion Valve

Exhaust Gaskets
A metal ring used on the exhaust to seal pressure. A piece of thin compressible material such as cork, rubber, or soft metal, placed between two mating surfaces to form a seal.

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Exhaust Gaskets

Exhaust Manifold Gaskets
Exhaust manifold gaskets seal gaps to keep exhaust fumes out of the emissions system, as well as reduce engine noise and improve fuel efficiency.

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Exhaust Manifold Gaskets

Exterior Car Paint
If you have ever considered repainting your vehicle, there are various types of exterior car paints that are available. Achieving the perfect car paint finish usually involves several different types of paint or finish to ensure proper bonding of the paint to the metal surface of the vehicle and to create a glossy shine that is attractive.

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Exterior Car Paint
F

Fan Clutch
Engine cooling fans spin freely without power when cooling isn't needed, the fan clutch turns on the fan as temperatures increase, so that the fan is driven by engine power and moves air to cool the engine.

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Fan Clutch

FEAD Kit
Front-End Auxiliary Drive (FEAD) kits, may vary in contents, but in most cases with contain a combination of alternator, tensioner, belt, idler pulleys and hardware.

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FEAD Kit

Feeler Gauges
A tool used to measure gaps or clearance between two parts that are difficult to reach.

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Feeler Gauges

Filter Wrench
A tool for removing spin-on type oil filters. Spin-on filters are smooth canisters that are difficult to grip, using a filter wrench allows for easy removal during oil changes.  

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Filter Wrench

Flange Gasket
Categorized by their inside and outside diameter, flange gaskets are made to fit between two sections of pipe that are flared.  

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Flange Gasket

Flannel Car Cover
A flannel car cover’s material is 100% cotton or cotton/polyester blends. Flannel covers are not water resistant and should not be used outside for long periods of time. For indoor use, the 100% cotton flannel cover is the gentlest on the paint and probably the best choice. If you store your car over the winter, or drive your pride and joy infrequently, a 100% cotton cover may be a wise investment.

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Flannel Car Cover

Flasher
Another name for a car's turn signal, the lighted indicator that blinks to designate which way a vehicle is turning. 

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Flasher

Flat Washer
A thin plate with a hole that is used to distribute the load of a screw or nut. 

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Flat Washer

Flex Fan
Flex fans has steel frame with blades of either plastic or steel riveted to the frame. These blade flatten out once the vehicle reaches set RPM which reduces drag on the engine. The biggest advantage of a flex fan is that is can pull a large amount of air through the radiator during idle.

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Flex Fan

Flexplate
Found in automatic transmission vehicles, that flexplate is a metal disk that connects the engine to torque converter.

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Flexplate

Float Step
Float step is a breakpoint in a non-linear battery charger whereby the charge current is either ramped up or down depending upon the state of charge.

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Float Step

Flooded Lead (Lead Acid Battery; Wet Cell Battery)
A flooded battery is a considered to be a conventional battery. It is constructed of lead plates, coated with active material and contained within cells in the battery case. Each cell is flooded to approximately the top of the plates with sulfuric acid.

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Flooded Lead (Lead Acid Battery; Wet Cell Battery)

Floor Mats
Protective mats placed on the floor of a vehicle to hinder tracking of mud or debris, and protect the interior carpet from wear and tear over time.

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Floor Mats

Flywheel
A flywheel provides energy to start the engine and stores rotational energy for the engine to use when the energy source isn't continuous. It is specifically weighted to provide balance for the crankshaft and is a connection of power between the engine and transmission.

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Flywheel

Fog Lights
Fog lights are bright lights on a motor vehicle, they are used during fog to improve road visibility or warn other drivers of another vehicle on the road.

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Fog Lights

Four-Stroke Engines
A four-stroke engine (also known as four-cycle) is an internal combustion engine in which the piston completes four separate strokes - intake, compression, power, and exhaust - during two separate revolutions of the engine's crankshaft, and one single thermodynamic cycle.

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Four-Stroke Engines

Four Wheel Drive Actuator
Switch used to engage the front differential in vehicles that have the ability to activate a four-wheel-drive setting.

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Four Wheel Drive Actuator

Freeze Plug
(Commonly called frost plugs, expansion plugs, or core plugs.) Freeze plugs are used to prevent the engine block from cracking in freezing situations. If the water in the engine freezes and expands, the expansion plug "pops out" to prevent damage to the engine.

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Freeze Plug

Freon
The registered trademark for several different types of refrigerants.

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Freon

Front Wheel Drive
Front-wheel drive (FWD) is a form of engine/transmission layout used in motor vehicles, where the engine drives the front wheels only. Most modern front-wheel-drive vehicles feature a transverse engine, rather than the conventional longitudinal engine arrangement generally found in rear-wheel-drive and four-wheel-drive vehicles.

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Front Wheel Drive

Front Ride Height
Ride height (also called ground clearance or simply clearance) is the amount of space between the base of an automobile tire and the underside of the chassis; or, more properly, to the shortest distance between a flat, level surface, and any part of a vehicle other than those parts designed to contact the ground (such as tires). Ground clearance is measured with standard vehicle equipment, and for cars, is usually given with no cargo or passengers.

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Front Ride Height

Fuel-Air Mixture
A combination of Vaporized fuel and air which is brought into the cylinder through the carburetor or fuel injectors. When it is compressed and ignited, it produces the power needed to drive the engine. A mist consisting of fuel and air that's compressed in the cylinders and ignited to drive the pistons in a car's engine.

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Fuel-Air Mixture

Fuel Door
The fuel door is used to protect the entry location of fuel into the vehicle. Fuel doors are also used to camouflage the gas cap location to improve the appearance of the vehicle.

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Fuel Door

Fuel Economy Gauge
A feature in many vehicles that displays how many miles per gallons the vehicle is getting at any given moment.

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Fuel Economy Gauge

Fuel Filter
Normally consist of paper filter cartridges in the fuel line that removes dirt and rust from the fuel.

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Fuel Filter

Fuel Injector
A pump and valve mechanism that sprays fuel under pressure into the combustion chambers of an engine that doesn't have a carburetor.

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Fuel Injector

Fuel Level Gauge
An instrument, normally on the vehicle's dashboard, which shows the amount of fuel in the tank.

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Fuel Level Gauge

Fuel Pressure Regulator
Found in almost all vehicles with internal combustion engines. Part of the vehicle's fuel system, it regulates the pressure of the fuel flowing through the system.

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Fuel Pressure Regulator

Fuel Pump
The fuel pump draws fuel from a tank to supply fuel for a carburetor or fuel injection system.

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Fuel Pump

Fuel Tank Sending Unit
The fuel tank sending unit uses a float and a resistor to measure the gas level and relays the amount of fuel in the gas tank to the gauge on your dash.

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Fuel Tank Sending Unit

Fuel Vapor/Vent Pressure Sensor
The fuel vapor/vent pressure sensor is part of the fuel pump assembly. It's part of the evaporative emissions system and reads pressure in the fuel system to detect leaks, such as a loose or faulty gas cap.

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Fuel Vapor/Vent Pressure Sensor

Funnel
A device that is narrow at the bottom and wide at the top, it is used to guide liquid or powder into containers with a small opening.

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Funnel

Fuse
A device used for safety with a wire strip that melts or breaks when an electric current goes above a safe level.

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Fuse
G

Gasket
A shaped or molded piece of rubber or other material that is used to seal the gaps between two surfaces.

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Gasket

Gas Charged Shock Absorber
A plastic cell of gas that fills the space to reduce aeration, installed between the reserve tube and the pressure tube of a two-stage shock absorber.

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Gas Charged Shock Absorber

Gasket Paper
Gasket sheets are used for areas where extreme heat and pressure sealing are required such as exhaust gaskets.

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Gasket Paper

Gear Oil
A high-viscosity lubricant made for transmissions, transfer cases, and differentials in vehicles to protect the gears.

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Gear Oil

Generator
A device that converts mechanical energy from an external source into usable electrical energy.

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Generator

Glowplug
An electrical element located in the combustion chamber of a diesel engine which helps to heat up the air in the chamber so that the diesel fuel will be ignited more quickly. Often they are connected in series so that when one becomes defective the others are inoperative. Also called a 'heater plug'.

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Glowplug

GPS
GPS receivers are devices which determine the position, speed, and time at the vehicles location. They are used to provide navigational information to locations.

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GPS

Grease Gun
A tool used to apply lubrication to a specific point.

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Grease Gun

Grids
Grids are another name for battery plates, because the plates are perforated in such a manner as to form the appearance of a grid.

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Grids

Grill
A grill covers the front opening in the body of a vehicle allowing air to enter, while stopping the entrance of debris, and protecting the radiator and engine.

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Grill

Ground
Ground, also known as earth, negative or return. Ground carries electrical energy to complete the electrical circuit through a substitute for earth, in the case of a vehicle normally through the chassis.

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Ground

Guide Bolt
Used to position the caliper.

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Guide Bolt
H

Harmonic Balancer
A harmonic balancer is a drive component connected to the crankshaft of an engine, it's purpose is to reduce engine vibration and serve as a pulley for drive belts.

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Harmonic Balance

HC12a
A hydrocarbon refrigerant blend.

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HC12a

Head
An alignment head is a device which clamps to a wheel, to give a technician the ability to check the condition of the vehicle's wheel alignment.

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Head

Headers
Headers eliminate the exhaust manifold's back pressure, making it easier for the engine to push exhaust gases out of the cylinders.

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Headers

Head Bolts
The bolts that fasten the cylinder heads to the engine block.

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Head Bolts

Head Gaskets
A head gasket is a gasket that sits between the engine block and cylinder head(s) in an internal combustion engine. Its purpose is to seal the cylinders to ensure maximum compression and avoid leakage of coolant or engine oil into the cylinders.

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Head Gaskets

Headlamp Motor
A motor in some vehicles that is used to move headlights up, down, and side to side.

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Headlamp Motor

Headlight
Forward facing lights on a vehicle that contain a reflector and special lens to illuminate the road ahead while driving in low or no light conditions.

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Headlight

Headliner
Material that is adhered to the inside roof of vehicles. Normally fabric with a thin layer of foam under it.

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Headliner

Heater
A device used to heat the interior of a vehicle.

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Heater

Heater Air Intake
Increases the temperature of the air going into the engine to improve the mixing of air and fuel in order to improve fuel usage and reduce emissions.

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Heater Air Intake

Heater Blend Door
Controls the flow of heated air allowed into the cabin area of a vehicle.

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Heater Blend Door

Heater Cord
Used to heat the vehicle cabin area. Like a radiator, it is composed of a winding tube carrying hot coolant through the core and produces heat.

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Heater Cord

Heater Hose
Hose used to transport coolant to the heater core from the engine.

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Heater Hose

Heat Sink
A finned housing, normally made of aluminum, that is used to dissipate heat.

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Heat Sink

Helper Springs
Used to support parts of the vehicle suspension. They can be added to a vehicle that needs extra suspension support due to heavy loads to level out the load stress on the vehicle.

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Helper Springs

Hex Nuts
Nuts with six sides and are used with screws or bolts to hold items in place.

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Hex Nuts

Hex Sockets
A socket that has six points and is used to tighten or loosen a hexagonal nut or bolt.

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Hex Sockets

High Heat Paint
High heat paint is for use up to temperatures of 1,200 degrees Fahrenheit. Normally the paint is rust and corrosion resistant for durability.

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High Heat Paint

High-pressure line
The discharge side for the air conditioning system that carries high pressure vapors, liquid, or air.

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High-pressure line

Hitch
The main component of a towing system. It is attached to the chassis of a vehicle allowing it to be used to pull a trailer.

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Hitch

Hoist/Stand Lift
A lifting support stand used to lift heavy parts out of a vehicle making hard jobs easier to accomplish in your home garage.

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Hoist/Stand Lift

Hose Clamps
Clamps used to attach and seal a hose onto a fitting.

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Hose Clamps

Hot Cranking Amp
Hot cranking amps (CCA) is the amount of current that a battery can deliver at 80 degrees Fahrenheit. Specifically, it is the number of amps that a battery can deliver for a period of 30 seconds while maintaining a minimum of 1.2 volts per cell (7.2 volts for a 12 volt battery).

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Hot Cranking Amp

Housing Gasket
Both external and internal oil filters attach to the housing, which mounts to the engine and requires a gasket to keep engine oil from leaking out around it.

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Housing Gasket

Hub
The hub is located between the brakes and the drive axle. It is mounted to the chassis holding bracket on the axle side, and mounted to the wheel hub bolts on the brake side.

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Hub

Hydraulic Cylinders
An actuation device that makes use of a pressurized hydraulic fluid is known as a hydraulic pump. This mechanism is used for producing in linear motion and force in applications that transfer power.

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Hydraulic Cylinders

Hydraulic Hose
A hydraulic hose is a reinforced hose that carries pressurized hydraulic fluid within valves, actuators, and tools.

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Hydraulic Hose

Hybrid Battery
A battery used in hybrid cars that aren't housed in the engine cavity. Hybrid batteries are rechargeable lithium I\ion batteries.

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Hybrid Battery

Hybrid Wiper Blades
Hybrid wiper blades combine the pressure points of bridge wiper blades with the features and efficiency of beam style wiper blades.

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Hybrid Wiper Blades

Hydraulic Power Steering
Power steering helps drivers steer vehicles by augmenting steering effort of the steering wheel. Hydraulic or electric actuators add controlled energy to the steering mechanism, so the driver needs to provide only modest effort regardless of conditions. Power steering helps considerably when a vehicle is stopped or moving slowly.

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Hydraulic Power Steering

Hydrometer
A hydrometer is a device used to measure the specific gravity of the battery electrolyte or acid. Specific gravity of the electrolyte changes in proportion to the amount of electrical energy (voltage) in the battery.

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Hydrometer
I

Idle Control Motor
(Also known as a Idle Control Valve) Regulates the idling RPM of your vehicle's engine.

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Idle Control Motor

Idler Arm
Creating tension and guidance for drive belts, idler pulleys are routed around front end and engine accessories and can provide reduced vibration and improved clutching action.

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Idler Arm

Idler Pulley
Pulley that is responsible for guiding and tensioning the engine drive belts.

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Idler Pulley

Ignition Box
The ignition box produces the spark that starts the combustion of the air and fuel mixture when starting the vehicle.

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Ignition Box

Ignition Coil
A step-up pulse transformer which is a part of the ignition system. It receives a small amount of electrical voltage from the battery and steps up the low primary voltage and amplifies it into a big jolt of secondary voltage of volts, and sends it to the spark plugs. It is made of two windings and a core of iron. Also called just coil.

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Ignition Coil

Ignition Coil Boot
A small cylinder that connects the ignition coil to the spark plug wires.

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Ignition Coil Boot

Ignition Control Module
The main component of the vehicle's ignition system. It is a computer that controls the ignition coil, or the ignition coil's firing time. 

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Ignition Control Module

Ignition Lock
The ignition lock cylinder is the part where the key is inserted into ignition to start a vehicle.

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Ignition Lock

Ignition Manifold
The intake manifold is a series of tubes that distributes air and fuel mixture coming into the engine from the carburetor.

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Ignition Manifold

Ignition Module
A transistorized component in an electronic ignition that triggers the ignition coil to fire high voltage. It replaced the breaker points on older cars.

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Ignition Module

Ignition Rotors
The intake rotors are a moving piece inside the distributor cap that controls the connection between the spark plugs and ignition coil.

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Ignition Rotors

Ignition Sensor
A sensor that sends information back to the various computers on a vehicle.

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Ignition Sensor

Ignition Spark
The combustion of the compressed air/fuel mixture in the combustion chamber that is ignited by an electric spark from a spark plug.

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Ignition Spark

Ignition Switch
A control device that is generally operated with a key that closes and opens an electrical current to connect and disconnects the ignition system from the battery so that the engine can be started and stopped as desired.

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Ignition Switch

Ignition System
The system that provides the electrical current or spark to ignite the air-fuel mixture in the combustion chambers.

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Ignition System

Ignition Timing
The relationship between the time a spark plug is fired and the position of the piston in terms of degrees of crankshaft rotation.

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Ignition Timing

Ignition Wires
High tension lines (spark plug wires) to the spark plugs where it ignites the air-fuel mixture. The high voltage wires that go to each of the spark plugs are called spark plug wires or high tension leads.

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Ignition Wires

Included Angle
Included angle is the angle formed between the SAI and the camber. Included angle is not directly measurable. To determine the included angle, you add the SAI to the camber. If the camber is negative, then the included angle will be less than the SAI, if the camber is positive, it will be greater. The included angle must be the same from side to side even if the camber is different. If it is not the same, then something is bent, most likely the steering knuckle.

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Included Angle

Independent Rear Suspension
Independent suspension is a broad term for any automobile suspension system that allows each wheel on the same axle to move vertically (i.e. reacting to a bump in the road) independently of each other.

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Independent Rear Suspension

Indoor Car Cover
Designed to help protect garage vehicles from dust, scratches, and insects.

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Indoor Car Cover

Induction Coil
Same as a ignition coil. A pulse-type transformer for increasing the voltage to fire the spark plugs.

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Induction Coil

Intake Manifold Gaskets
The intake manifold is an aluminum, steel or plastic cover that sits on top of the engine. It is attached to the top of the engine by an intake manifold gasket that is made of plastic and rubber. The intake manifold directs the air-fuel mixture in the engine to the corresponding cylinder where it is burned to produce power.

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Intake Manifold Gaskets

Intercooler
Intercoolers are most often used in supercharged or turbocharged cars. The intercooler cools intake air compressed by the turbocharges, this increases the density of the air going into the engine.

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Intercooler

Intercell Connections
The intercell connections are often referred to as the strap. It is generally a flat metal plate that connects each of the cells inside a battery so as to provide continuity through the battery.

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Intercell Connections

Internal Combustion Engine
(ICE or IC) An engine that burns fuel within itself as a means of developing power (unlike an External combustion engine such as a steam engine).

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Internal Combustion Engine

Inverter
Device that converts voltage from direct current (DC) to alternating current (AC).

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Inverter
J

Jack Stand
A jack stand is used to keep a vehicle lifted after a floor jack has raised the vehicle up.

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Jack Stand

Jumper Cables
Pair of connected cables with clips on the end, which are used to start a vehicle with a dead battery by connecting it to another live battery.

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Jumper Cables

Jumpstart
A jumpstart is used to act like the battery of another car to generate enough power to "jump" a dead battery and start your vehicle's engine.

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Jumpstart
K

King Bolt
A bolt connecting the fore axle with the body of a vehicle.

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King Bolt

Kingpin
The kingpin is the main pivot in the steering mechanism of a heavy truck. It usually consists of a machined steel bolt, washers, bearings and seals.

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Kingpin

Knock Sensor
Used to sense the vibrations of the engine knock to change ignition timing as needed. Traditionally located on the engine block, cylinder head, or intake manifold.

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Knock Sensor

Knuckles
In an automotive suspension a steering knuckle is the part which contains the wheel hub or spindle, and attaches to the suspension components. It is variously called a steering knuckle, spindle, or hub as well.

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Knuckles
L

Lacquer-Based Automobile Paints
Due to fast drying process and thin body, lacquer based paints flow smoothly. Lacquer-based finishes and paints can easily be sprayed and dried with gloss finish.

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Lacquer-Based Automobile Paints

Lash
Clearance in the valve operating train with cam follower on camshaft base circle.

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Lash

LC Circuit
An LC circuit can store electrical energy oscillating at its resonant frequency.

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LC Circuit

Leaf Spring
A leaf spring is a piece of the suspension system that is made of think strips of metal that are layered to make a single curved piece. Leaf springs absorb vibration from the vehicle's weight and any bumps by creating friction and sliding over each other while bending.

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Leaf Spring

Leak Detection Tester
A device to test for refrigerant leaks.

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Leak Detection Tester

Lift Ramp
Unlike a jack which lifts a car straight up from single point, a lift ramp raises a vehicle when driven up onto gradual ramps.

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Lift Ramp

Lift Support
A hydraulic cylinder that restores the original opening and closing speeds of your hood, hatch or trunk.

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Lift Support

Load Bearing
Is a Bearing that handles the stress of a wheel. It used to enable rotational or linear movement, while reducing friction and handling stress.

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Load Bearing

Load Tester
A load tester, often called a resistance tester or carbon pile, is a battery tester that applies an electrical load to the battery to simulate the effect of a starter or other large electrical load within a vehicle. Load testing is a dynamic test that often reveals battery problems that a simple voltage tester would not.

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Load Tester

Lock Cylinder
Part of the ignition system where you enter the key to start a vehicle. It is composed of tumblers or pins.

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Lock Cylinder

Lock Nut
Lock nuts are high quality nuts that stay tight under vibrations and torque.

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Lock Nut

Lock Washer
A washer with physical attributes to stop rotation. They are used to lock nuts and bolts in place. Lock washer can have a few different appearances some are rings with uneven ends, others are star shaped with an outer ring of teeth.

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Lock Washer

Lubricant
A substance used to reduce friction between surfaces that are in contact.

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Lubricant

Lug Lock
Lug locks are used in place of a lug nut on a vehicle, they can only be removed with a special key that comes with the set. They are used to deter theft of wheels.

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Lug Lock

Lug Nut
Lug nuts are used to secure wheels to the vehicle's axles, preventing problems during driving.

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Lug Nut

Lug Wrench
A specialized socket wrench used to loosen and tighten lug nuts.

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Lug Wrench

Low-pressure line
The return side of the air conditioning system that carries low pressure vapors, liquid, or air.

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Low-pressure line
M

Magnet
A piece of magnetized steel that will attract all ferrous material. The Permanent magnet does not need electricity to function and will retain its magnetism over a period of years. Often shaped into the letter U.

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Magnet

Magnetic Pickups
A pulse generator consisting of a stator with a permanent magnet and a rotor, which induces an AC voltage in the inductive winding by the periodic change of the air gap between stator and rotor. Magnetic pick-ups attached to the distributor for ignition triggering have as many teeth on the pole piece (stator) and on the trigger wheel (rotor) as the engine has cylinders. Some magnetic pick-ups have a bowl-like rotor with ferrite rods inserted in the walls. Magnetic pick-ups on the crankshaft flywheel act as reference mark sensors.

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Magnetic Pickups

Manifold Vacuum
As the pistons move down on the Intake stroke, they create a suction or vacuum in the intake manifold.

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Manifold Vacuum

Marine Cranking Amp
Marine cranking amps (MCA) is the amount of current that a battery can deliver at 32 degrees Fahrenheit. Specifically, it is the number of amps that a battery can deliver for a period of 30 seconds while maintaining a minimum of 1.2 volts per cell (7.2 volts for a 12 volt battery). MCA is better known as cranking amps.

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Marine Cranking Amp

Marine Power Inverter
Marine grade electrical device that converts voltage from direct current (DC) to alternating current (AC).

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Marine Power Inverter

Mass Air Flow Sensor
Used to measure the mass flow rate of air entering the engine. The sensor conveys this information to the engine control unit to ensure the correct amount of fuel mass is delivered to the engine.

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Mass Air Flow Sensor

Master Cylinder
The hydraulic pump in a vehicle's brake system, it supplies pressurized hydraulic fluid to the brakes.

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Master Cylinder

Master Cylinder Cap
The cap on the master cylinder. Provides a tight seal preventing brake fluid from leaking out of the master cylinder, and protecting the braking system from external elements.

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Master Cylinder Cap

Master Cylinder Gasket
Gasket used to prevent moisture from entering the master cylinder. Also helps to keep hydraulic pressure to ensure brakes work to the best of their ability.

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Master Cylinder Gasket

Matte Finishes
Matte is a dull non-gloss finish. Matte (or flat paints) diffuses light in a range of angles, making the paint have no shine effect. It’s not common to see matte finishes, but some niche vehicles are available in a variety of matte colors, usually grey or black.

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Matte Finishes

Memory Effect
Memory effect refers to the conditioning of a battery, whereby the discharge pattern repeats for each subsequent time that the battery is charged and discharged.

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Memory Effect

Metallic
Metallic paints are effectively the same as solid paints, only with a small quantity of powdered metal added. The size and type of metal added varies depending on manufacturer choices, but it’s commonly about 1 part in 50 of aluminum powder.

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Metallic

Metal Polish
Polish for chrome, aluminum, magnesium, brass, copper, stainless steel, and many other metals.

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Metal Polish

Metric Tires
A size designation for tires that is more common for foreign cars. When looking at the wall of the tire where the size is you will not see a "P" in front of the size if it is a metric tire.

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Metric Tires

Microfiber
Material used to make mats, upholstery, industrial filters, cleaning products and more.

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Microfiber

Microfiber Towel
Cleaning cloth used to wash and wax your car.

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Car Covers

Mirror Cover
Covers put on the side mirrors of a vehicle that protect them from road debris damaging the mirror as it flies off the road. Also used to add an owners personal flair to the exterior of the car.

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Mirror Cover

Misalignment
The state of your vehicle's wheels when they are out of alignment. This can lead to uneven and rapid treadwear resulting in the need to replace tires sooner.

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Misalignment

Moisture
Damp or wet areas of water.

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Moisture

Motorcycle Battery
Converts chemical energy into electrical energy used to run the motorcycle; composed of cells that produce between 2.11 to 2.2 volts each.

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Motorcycle Battery

Motor Mounts
Brackets, usually made of rubber with metal bolt bracket holes, used to bolt the engine to the frame of the vehicle. They support the engine and transmission assemblies within the engine compartment.

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Motor Mounts

Motorcycle Oil
Oil specifically made for use in motorcycles. Due to the not needing friction modifiers like other automobiles, they contain more anti-wear additives to limit wear on the engine.

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Motorcycle Oil

Muffler
Mufflers are commonly known as the silencer. They play a major role in your exhaust system by reducing the amount of noise emitted by your internal combustion engine. Your muffler also helps prevent fumes from getting inside your vehicle, and they improve your engine and fuel efficiency.

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Muffler

Muffler Clamp
Used to support the muffler under the vehicle.

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Muffler Clamp

Multi Meter Tester
An electronic device that is used to measure voltage, current, and resistance. Commonly used to troubleshoot electrical issues.

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Multi Meter Tester
N

Negative Charge
Negative charge simply means that one source has a lower electrical potential than another.

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Negative Charge

Negative Grounded
In a negative ground electrical system, current travels from the positive to negative using the chassis as a current return path to the battery. The vast majority of road vehicles in use today are negative grounded.

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Negative Grounded

Nitrous
Nitrogen Oxide, commonly known as Nitrous, is used to create more power in an engine. When you inject nitrous into an engine the heat splits it into oxygen and nitrogen, this causes there to be more oxygen available during combustion allowing for more fuel injection.

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Nitrous
O

OE Touch Up
Paint specially formulated to exactly match the color of the original factory applied coating. Ideal for use on all OEM paint surfaces.

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OE Touch Up

Off Road Lights
External vehicle lights commonly used to perform specific jobs, from illuminating the road in dense fog or heavy rain to removeable spotlights for use with search and rescue missions and more.

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Off Road Lights

Ohm
An ohm is a measure of electrical resistance that causes one volt to produce a current of one ampere.

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Ohm

Oil
Oil is a lubricant added to engines to reduce friction created with internal part rubbing.

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Oil

Oil Absorber
Variations of clay, pads, "socks," and other materials, oil absorbers are designed to help clean up shop and garage spills of water, oil, grease, and other chemicals.

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Oil Absorber

Oil Additive
Addition to oil that can be for multiple purposes, including stopping leaks in front and rear seals.

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Oil Additive

Oil Breather
The oil breather is the vent to release the pressure that builds around the crankcase.

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Oil Breater

Oil Cooler
Often used on heavy duty vehicles and vehicles with towing applications, oil coolers assist in providing additional cooling of engine oil. Typically, they are designed like a small radiator and are an aftermarket option that works alongside other cooling elements to keep engine oil at an ideal temperature.

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Oil Cooler

Oil Pump
A pump that circulates the oil through the engine from the oil pan. Without a working oil pump your engine can not do its job.

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Oil Pump

Oil Drain Plug
A drain plug is a plug which is taken out to allow a fluid to be drained from a tank such as an engine oil pan or sump.

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Oil Drain Plug

Oil Drain Plug Gasket
Some vehicles have oil drain plug gaskets in addition to their drain plugs. They serve to stop oil from leaking and act as a lock washer for the drain plug. These gaskets need to be replaced with every oil change.

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Oil Drain Plug Gasket

Oil Filter
A component, located near the oil pump, that removes abrasive particles from the motor oil by a straining process as the oil circulates through the lubrication system.

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Oil Filter

Oil Filter Cap
Cap used to cover the hole on the engine where the oil is added.

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Oil Filter Cap

Oil Filter Gasket
Used to stop oil from leaking out of the filter when mounted to the engine.

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Oil Filter Gasket

Oil Level Sensor
Measures the amount of oil in the oil pan before the engine is started.

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Oil Level Sensor

Oil Pan
Metal container that contains the oil; it is attached to the bottom of the engine.

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Oil Pan

Oil Pan Gaskets
An oil pan is a metal container that contains the engine oil. The oil pan gasket seals the oil pan to the bottom of the engine.

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Oil Pan Gaskets

Oil Pressure Gauge
Normally found on a vehicle's dashboard, the oil pressure gauge shows what the oil pressure is and warns if oil pressure is too low, which can be an indication of a broken oil pump or a worn bearing.

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Oil Pressure Gauge

One-Part Paint
The single/one or two-part component paints are also known as 1K or 2K and these distinctions simply refer to the need or non-need of an activator for the paint to dry. You can spray one or single part products instantly, although they might need a solvent like thinner so it can go through a spray gun properly. This kind of paint is not usually used to paint a whole car.

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One-Part Paint

Open Circuit Voltage
Open circuit voltage (OCV) in reference to a battery is the voltage as measured across the battery terminals with no load applied.

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Open Circuit Voltage

Orifice Tube
A component of the air conditioning system that controls the flow of liquid refrigerant to the evaporator.

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Orifice Tube

Outdoor Car Cover
Created for outdoor use against the elements that can damage your car’s paint and finish.

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Outdoor Car Cover

Out-Of-Alignment
The state of your vehicle's wheels when they are out of alignment. This can lead to uneven and rapid treadwear resulting in the need to replace tires sooner.

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Out-Of-Aligmnent

Overcharge
Overcharge is the continuous introduction of charging current through a battery after all the active material has been converted chemically to a charged state. Overcharge by definition is the exceeding of 100% state of charge.

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Overcharge

Over Discharge
Over discharge is an excessive discharge applied to a battery and can be damaging.

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Over Discharge

Oversteer
The tendency for a vehicle, when negotiating a corner, to turn more sharply than the driver intends.

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Oversteer

Oxygen Sensor
An oxygen sensor, senses the amount of oxygen in the exhaust system. The amount of oxygen in the exhaust gas stream is in the same ratio to the air and fuel mixture being burned in the cylinders.

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Oxygen Sensor
P

Padlock
Padlocks are detachable locks on a pivoted U-shape. They can be used to secure tools, cargo and storage boxes, and other garage and shop items.

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Padlock

Paint Classification Systems
Paint classification systems are used to individualize paint in single-stage, undercoat, mid-stage, clear-coat and base-coat products. With these systems, automobile paints are classified into usage instead of composition in the process of painting.

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Paint Classification Systems

Paint Remover/Stripper
Any variation of chemicals and/or tools used to strip paint from surfaces. Abrasive pads, sandpaper, and chemical-based paint remover products are used to prep surface (both automotive and other) prior to paint application.

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Paint Remover/Stripper

Pan Gaskets
The pan gasket is a mechanical seal between the transmission oil pan and the transmission itself.

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Pan Gaskets

Parasitic Drain
Parasitic drain, also referred to as parasitic draw, is the unintended discharge of a battery through applied electrical loads that typically remain on continually. Typical parasitic drain can be the keep-alive memory in the vehicle computers, but can also be an unintended load such as a glove box light left on.

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Parasitic Drain

Parking Assist
A series of sonar sensors on front and rear bumpers that can allow your vehicle to calculate parking angles. Parking assist is a factory on some makes and models, but can also include aftermarket electronics like dash cams and backup cameras.

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Parking Assist

Parking Brake
Sometimes known as a hand brake or emergency brake, a parking brake can be either a drum or disc brake used to keep a vehicle from moving when parked or for an emergency stop. Parking brakes are activated through the use of a hand lever of foot pedal.

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Parking Brake

Parts Cleaner
Solution used for cleaning parts

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Parts Clearner

Passive Rear Wheel Steering
The passive steering system uses the lateral forces generated in a turn (through suspension geometry) and the bushings to correct this tendency and steer the wheels slightly to the inside of the corner. This improves the stability of the car, through the turn.

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Passive Rear Wheel Steering

Paste Wax
Traditional wax typically used by professional detailers that can be repeatedly buffed and shined.

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Paste Wax

Patch
Traditional wax typically used by professional detailers that can be repeatedly buffed and shined.

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Patch

PCM
Abbreviation for Powertrain Control Module A computer that controls the operation of the engine's fuel, ignition, and emission-control systems as well as the transmission on vehicles with automatic transmission.

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PCM

Peelable Paint
Paint that is removable by peeling, commonly used for things like racing stripes and rims.

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Peelable Paint

Pedal Sensor
Sensor that when you depress or lift off the throttle/accelerator sends and electrical signal to the engine control unit, which then transmits it to the fuel system.

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Pedal Sensor

PCV Valve
The PCV valve is a spring-loaded valve with an orifice size designed to restrict the amount of air that's taken from the crankcase into the intake manifold.

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PCV Valve

Pearlescent
Pearlescent paints use ceramic crystals that don’t just reflect light but refract it too, splitting it into different colors by allowing some light in and slowing it down as it passes through. This gives the paint not just a sparkle, but a deep color that can vary depending on how you look at it, making for interesting effects where the car’s bodywork creases or changes direction.

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Pearlescent

Pedal Pads
Pedal pads are, quite simply, the top of the foot pedals for the gas, brake, and clutch. Replacement, custom, and performance pedal pads are available for varying applications.

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Pearlescent

Petrol Engine
Gas Engine. A British term for gasoline.

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Petrol Engine

Pigment
the pigment or what is also known as the tint is the one responsible for the color of the paint.

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Pigment

Pigtails
Several wires that terminate into a connector or plug.

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Pigtails

Pinstripe
A stripe or stripes used to customize the exterior of a vehicle. Pinstripes can be applied with paint or decals.

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Pinstripe

Pipe Plug
Pipe plugs are used to plug unused holes and seal pipe ends in automotive applications, including the engine block and manifold.

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Pipe Plug

Pipe Thread Fittings
Designed to resist movement and vibration, pipe thread fittings are used for sealing and connecting pipes.

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Pipe Thread Fittings

Piston
Pistons transfer force from pressurized gas in a cylinder to operate the crankshaft. They are moving parts encapsulated in a cylinder that seal in gas using piston rings on the outer diameter.

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Piston

Piston Ring
Fits in a groove on the outside of a piston; it seals gas for the combustion chamber, improves heat transfer from the piston to the cylinder wall, regulates oil between the piston and cylinder wall, and maintains engine oil consumption.

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Piston Ring

Pitman Arm
A short lever arm splined to the steering gear cross shaft , the pitman arm transmits the steering force from the cross shaft to the steering linkage system.

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Pitman Arm

Plastic Car Cover
Designed to be waterproof and a temporary solution for outdoor protection.

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Plastic Car Cover

Plastic Restorer
Product used to revitalize faded exterior plastic and rubber components.

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Plastic Restorer

Plastic Spreader
Application device constructed of plastic. Ideal for spreading body fillers.

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Plastic Spreader

Plenum Chamber
An area, filled with air at a pressure that is slightly higher than the surrounding air pressure, such as the chamber just before the blower motor.

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Plenum Chamber

Plenum Gaskets
A piece of thin compressible material such as cork, rubber, or soft metal, placed between two mating surfaces to form a seal within the plenum chamber.

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Plenum Gaskets

Plenum
A chamber containing air under pressure.

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Plenum

Plug
Either an obstruction blocking a hole, or a device for making an electrical connection.

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Plug

Polarity
Polarity is the electrical condition of positive or negative charge.

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Polarity

Polarization
Polarization is the change in electrical potential in a battery cell that is caused by current flow through the battery.

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Polarization

Polish
Car polish is used before you apply the wax coat. It is used to remove grease, dirt, scrapes, and scratches that cannot be removed from washing. This is a type of car wax prep and car detailing product. Polish comes in the form of creams, sprays and liquids and contains solvents that will remove impurities to allow the paint to shine through.

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Polish

Polisher
Device used for polishing. Similar to a buffer, except it oscillates rather than rotates, which lessens the chances of the machine inflicting swirls into the car's finish.

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Polisher

Polishing Bonnet
Polishing pad covers made of fabric, bonnets can be used removing and waxes and polishing. Materials can include cotton, wool, and microfiber.

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Polishing Bonnet

Polishing Cloth
Cloth used for polishing. Regarding cars, polishing cloths are typically soft and used on final wipe downs after washing, waxing, and polishing.

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Polishing Cloth

Position Sensor
A position sensor is any device that permits position measurement. In the automotive world some examples are: crankshaft position sensor, camshaft position sensor, and throttle position sensor.

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Position Sensor

Positive Charge
Positive charge refers to introduction of electrons toward the electrode or terminal with a shortage of electrons.

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Positive Charge

Power Brake Booster
Used to lessen the amount of force needed to press hydraulic brakes.

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Power Brake Booster

Power Cylinder
A linear actuator consisting of a piston in a cylinder, driven by pneumatic or hydraulic fluid under high pressure.

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Power Cylinder

Power Inverter
A power inverter is designed for changing DC power to AC power for a portable, conventional power source.

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Power Inverter

Power Steering
A system for steering used on vehicles, where the torque applied to the steering wheel is augmented by engine power.

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Power Steering

Power Steering Belt
Is a belt used to transfer energy between the engine and the power steering pump to drive the power steering system.

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Power Steering Belt

Power Steering Control Valve
A power steering pump contains a pressure-relief valve to make sure that the pressure does not get too high, especially at high engine speeds when so much fluid is being pumped.

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Power Steering Control Valve

Power Steering Filter
Is an aftermarket device used when replacing a rack & pinion or power steering pump to remove contaminants usually found in the fluid after a previous system failure. Enables the replacement part to work more efficiently having clean fluid throughout the system.

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Power Steering Filter

Power Steering Gear Box
A gear box refers to the mechanism by which energy output of an engine or a high speed motor is redirected into another mechanical component in the same machine at a higher torque and at a lower rotational speed. The mechanism is also known as gear shifter.

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Power Steering Gear Box

Power Steering Hose
Power steering hoses deliver pressurized power steering fluid between the pump and cylinders to control the rate of return on the steering wheel.

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Power Steering Hose

Power Steering Fluid
A pressurized hydraulic fluid pumped against the pistons to help turn the wheels.

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Power Steering Fluid

Power Steering Pipe
A device used on a hydraulic system for the passage of hydraulic fluid to pass through the system to and from the pump. Similar in nature to a power steering hose, but is 100% metal.

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Power Steering Pipe

Power Steering Pressure Switch
The Power Steering Pressure switch feeds information about the demand on power to the Engine Control Module.

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Power Steering Pressure Switch

Power Steering Pulley
A power steering pulley is a pulley used to drive a power steering pump on an automobile or truck. Usually is attached to the Power Steering Pump which attaches to a belt and is driven by the engine.

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Power Steering Pulley

Power Steering Pump
The power steering pump transfers power steering fluid under pressure to other power steering system components, allowing the driver to steer with minimal effort.

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Power Steering Pump

Power Steering Hose
Power steering hoses are grouped into two parts, high pressure hose and low pressure hose. High pressure hose is required to supply the fluid under high pressure and hence it is used with compression fittings. Hoses are made up of reinforced synthetic compound and are highly resistive against the high pressure and temperature of the fluid passing through it. The low pressure hose is used to bring back the fluid from the gearbox to the reservoir and is not usually applied with compression fittings as the pressure of oil is comparatively low.

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Power Steering Hose

Power Window Regulator
Mechanism that moves the window up and down, powered by an electric motor. There is one power window regulator needed for each power window in the vehicle.

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Power Window Regulator

Pre-heater Hose
Directs warm air between the air cleaner and the exhaust manifold to prevent the carburetor from icing during cold conditions.

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Pre-heater Hose

Premix Paint
Ready-to-spray system that requires no mixing or reducing, and with no re-coat window.

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Premix Paint

Prep Finishes
Prep finishes are referred to as primers. Car paint primers are usually available in either grey or black and are used to 'prime' the surface of the vehicle and make it ready for painting. Primer is designed to help car paint better adhere to the vehicle by creating a binding layer that can bond to paint easier and more consistently than bare metal.

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Prep Finishes

Pressure Gauge
A device used to measure the amount of pressure in a given system.

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Pressure Gauge

Pressure Washer
Pressure washers utilize high pressure water for various household and garage cleaning applications, including decks, driveways, gutters, garage floors, and much more.

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Pressure Washer

Primer
Sometimes referred to as undercoat, primer is a preparatory coating applied to materials before painting.

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Primer

Primary Angles
The primary angles are the basic angle alignment of the wheels relative to each other and to the car body. These adjustments are the camber, caster and toe. On some cars, not all of these can be adjusted on every wheel.

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Primary Angles

Prop Shaft
A type of drive shaft that connects the rear differential and gearbox through a universal joint shaft, a prop (or propeller) shaft is common used on rear-wheel and four-wheel drive vehicles.

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Prop Shaft

Proportioning Valve
A component of the combination valve, the proportioning valve is used to control the release of enough brake fluid to the rear brakes during use.

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Proportioning Valve

Protectant Spray
Heat protectant spray designed to help protect against damage to car parts or finish from harsh temperatures.

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Protectant Spray

Pulse Board
Controls the entire windshield wiper system, from the electricity sent to the wiper motor to activate the wiper arm and move the wiper blades.

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Pulse Board

Pushrod Cover Gaskets
A piece of thin compressible material such as cork, rubber, or soft metal, placed between two mating surfaces to form a seal between the valve lifter and rocker arm.

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Pushrod Cover Gaskets

Pushrod
A solid or hollow rod which serves as a link between the valve lifter and rocker arm. The pushrod transmits the movement and force of the driver from the brake pedal lever to the master cylinder.

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Pushrod

Pyrometer
A pyrometer is type of thermostat that measure surface temperature. In the automotive world, it is used to measure exhaust temperature through the exhaust manifold.

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Pyrometer
Q
R

R-12
A chlorofluorocarbon refrigerant, also known as CFC-12, which was once the common chemical compound used in older refrigerant systems.

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R-12

R-134a
The refrigerant that is now used in automotive air conditioning systems today, which can be converted from R-12.

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R-134a

Racing Seats
Racing seats are designed to accommodate the performance and safety needs of race vehicles, including ergonomic support for extended driving, extra crash support, and safety harnesses/racing seatbelts.

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Racing Seats

Rack and Pinion
A rack and pinion is a type of linear actuator that comprises a pair of gears which convert rotational motion into linear motion. A circular gear called "the pinion" engages teeth on a linear "gear" bar called "the rack"; rotational motion applied to the pinion causes the rack to move, thereby translating the rotational motion of the pinion into the linear motion of the rack.

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Rack and Pinion

Radiator
A heat exchanger used to remove heat from the coolant in the cooling system containing a vertical or horizontal-finned tubing section connected between two tanks.

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Radiator

Radiator Cap
Acts as a pressure valve that releases coolant to the overflow tank when pressure inside the radiator goes above a certain level.

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Radiator Cap

Radiator Flush Kit
Designed to flush clean a vehicle's cooling system, a radiator flush kit allows for visual inspection and removal of debris in the coolant system.

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Radiator Flush Kit

Radiator Hose
Used to circulate coolant through the radiator and engine to help maintain the needed temperature.

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Radiator Hose

Radiator Overflow Tank
A radiator overflow tank is designed to collect coolant overflow created by heat expansion. The overflow tank then recycles the coolant and returns it to the cooling system once the heat has dissipated.

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Radiator Overflow Tank

Ratings
Ratings, as applies to batteries, are determined through a prescribed and precise series of tests. Ratings include cranking amperage, reserve capacity and voltage.

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Ratings

Rear Camber
The vertical axis angle of the rear wheels. Camber can be adjusted on vehicles to maintain the most traction of the tires on the road during turns.

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Rear Camber

Rear Wheel Drive
Rear-wheel drive (RWD) is a form of engine/transmission layout used in motor vehicles, where the engine drives the rear wheels only. Most rear-wheel-drive vehicles feature a conventional longitudinal engine arrangement.

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Rear Wheel Drive

Rear Ride Height
Ride height (also called ground clearance or simply clearance) is the amount of space between the base of an automobile tire and the underside of the chassis; or, more properly, to the shortest distance between a flat, level surface, and any part of a vehicle other than those parts designed to contact the ground (such as tires). Ground clearance is measured with standard vehicle equipment, and for cars, is usually given with no cargo or passengers.

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Rear Ride Height

Receiver
Also known as drier, receiver drier, or dehydrator. A storage component of the A/C system for liquid refrigerant and desiccants.

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Receiver

Recharge
The action of refilling the air conditioning system once a leak is fixed or repair is made.

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Recharge

Recirculating Ball
The recirculating ball steering mechanism contains a worm gear inside a block with a threaded hole in it; this block has gear teeth cut into the outside to engage the sector shaft (also called a sector gear) which moves the Pitman arm. The steering wheel connects to a shaft, which rotates the worm gear inside of the block.

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Recirculating Ball

Refrigerant
The substance used in the air conditioning system in order to create a cooling effect; its chemical compound can be changed from liquid to gas.

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Refrigerant

Refrigeration Cycle
The process in which the air conditioning system recycles refrigerant.

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Refrigeration Cycle

Relay
Switches used to let a low amp circuit to turn a high amp circuit on or off.

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Relay

Release Bearing
(Also known as a throw-out bearing) The release bearing moves the pressure plate's release fingers against the pressure plate spring force to initiate the clutch when the clutch pedal is engaged.

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Release Bearing

Reluctors
A ferrous metal piece attached to the distributor shaft. Made up of teeth of which the number are the same as the number of engine cylinders. As the reluctor teeth pass through the pick-up magnetic field, an alternating current is generated in the pick-up coil. Also called an Armature.

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Reluctors

Remote Starter
Available as both factory and aftermarket options on most new vehicles, remote starters are radio-controlled devices that allow drivers to start their vehicle without being in it.

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Reluctors

Reserve Capacity
Reserve capacity is the number of minutes a battery can maintain a specified voltage under a 25 ampere discharge load.

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Reserve Capacity

Resin
The resins in automotive paint are usually made up of one of three elements namely urethane, enamel or lacquer. In general though, enamel and urethane are the common terms for the chemical combination of hydrocarbon polymers that formulates the resins in paints. This chemical combination impacts the durability and look of a paint’s finish, the manner by which it is applied and its costs.

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Resin

Resistance
Resistance, also known as impedance is the restriction to electrical current flow within a battery.

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Resistance

Resister
A device that restricts current flow through a circuit.

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Resister

Resonator Assembly
Resonators eliminate specific exhaust sounds to highlight others, allowing drivers of performance vehicles to customize the exhaust sound their car or truck produces.

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Resonator Assembly

Respirator
A device or mask worn when applying paint or other chemicals to reduce breathing in unsafe materials and particles.

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Resonator Assembly

Reversal
A computer or module used in order to switch the A/C system on and off.

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Reversal

Rib Belt
(Also known as a serpentine belt) Rib belts are continuous belts used to drive your vehicle's alternator, water pump, power steering pump, air conditioning compressor, air pump and more.

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Rib Belt

Rim
Another name for a wheel.

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Rim

Rivet
A rivet is a cylindrical steel pin or bolt used to permanently fasten two or more pieces of metal in mechanical applications by flattening the headless end after insertion.

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Rivet

Rocker Arm
Rocker arms are curved levers that use a push are to engage valve stems to open valves within the engine.

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Rocker Arm

Rolling Chassis
Is an assembled working frame & Chassis of the automobile, including the wheels and suspension.

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Rolling Chassis

Rotary Backing Plate
Circular, flexible backing plates on rotary polishers that minimize heat transfer and flex to meet the contour of a vehicle.

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Rotary Backing Plate

Rotary Polisher
Polisher with a head that spins on a single axis in a circular motion, which causes heat and friction to build, allowing the user to perform paint correction processes.

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Rotary Polisher

Rotor (Ignition)
A small rotating cap-like unit at the end of the distributor shaft. It is located on the breaker cam inside the cap. It connects between the center electrode and the various outer spark plug terminals as it turns, thus distributing the high voltage from the ignition coil secondary winding to the proper spark plug. Also called rotor arm.

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Rotor (Ignition)

RPM
Abbreviation for revolutions per minute. The number of times a rotating object turns every minute.

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RPM

RTV Sealants
Seals, bonds, repairs, mends and secures glass, metal, plastics, fabric, vinyl, weather stripping and vinyl tops.

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RTV Sealants

Rubber Conditioner
Detailing product used to help protect rubber from drying, extreme temperatures, and everyday use.

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Rubber Conditioner

Rubber Insulator
(Also called a bushing) Rubber insulator is used to absorb vibration between two parts that interface while still allowing a needed amount of movement.

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Rubber Insulator

Rubbing Compound
An abrasive material used to grind the surface layers of a car's damaged or dull paint. Sometimes called cutting paste, it allows user to apply a new top coat of paint.

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Rubbing Compound

Running Board
Attached to the side of a truck or SUV to give an additional step up that eases the rider's entry into the vehicle's cab.

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Running Board

Rust Prevention
Products used to prevent rust.

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Rust Prevention
S

Safety Vent
A safety vent is also referred to more commonly as a vent cap, and is designed to vent excess hydrogen gas from the inside of a battery in the event of buildup in gas volume or pressure.

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Safety Vent

Sanding Disc
Sandpaper in the shape of a disc that is used on a sander.

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Sanding Disc

Sanding Sponge
Special type of sponge used for the replacement of blocks and traditional sanding screens. Used for wet or dry sanding on wood, paint, metal, or drywall.

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Sanding Sponge

Scan Tool
An electronic diagnostic tool, a scan tool connects to a vehicle's DLC (data link connector) and provides DTCs (diagnostic trouble codes), live data feeds, and programming capabilities depending on the model.

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Scan Tool

Scratch Remover
Product designed to remove light scratches and imperfections, such as swirl marks and hazing, in a car's finish.

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Scratch Remover

Scuffing Pad
Pad designed to scuff base, primed, or painted surfaces prior to applying primer or paint.

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Scuffing Pad

Sealant
Substance used to block the passage of fluids though the surface, joints, or openings in materials.

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Sealant

Seat Cover
Cover fitted to a vehicle's seat to protect the original seat fabric and/or add personal fashion to a vehicle.

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Seat Cover

Secondary Angles
The secondary angles include numerous other adjustments other than Caster, camber & toe, such as steering axis inclination, included angle, max turns, track width, etc.

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Secondary Angles

Sensor Connectors
A sensor connector is any device that connects a sensor to its needed part. In the automotive world some examples are: crankshaft sensor connector, camshaft sensor connector, knock sensor connectors, and cruise control sensor connectors.

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Sensor Connectors

Separators
Separators are comprised of paper, plastic or fiber batting and are used to separate the negative and positive plates within a battery cell, such that they are not permitted to touch one another.

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Separators

Serpentine Belt
Serpentine Belts, are also known as Poly-V, Multi-Rib, Multi-V or Poly Rib belts. Serpentine belts are a continuous belt used to drive your vehicle's alternator, water pump, power steering pump, air conditioning compressor, air pump and more.

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Serpentine Belt

Setback
Setback is a measurement referencing the wheels to a line placed perpendicular to the vehicle centerline. This line would be parallel to a line drawn through the centers of the spindle. If a vehicle has setback, one front tire/wheel assembly is farther back from this imaginary reference line across the front of the vehicle than the other.

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Setback

Severe Duty Brake Pads
Brake pads designed to perform in high heat environments, as well as towing, racing, and heavy-duty application.

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Severe Dute Brake Pads

Shift Knob
The top of the gear shifter in vehicles with a manual transmission, the shift knob - or gear knob - outlines a shift pattern and allows the driver to move between gears while operating the vehicle. In addition to OE replacement knobs, performance and sport knobs are aftermarket options.

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Shift Knob

Shock
A component using friction to dampen and control a vehicle's suspension up and down movement. Modern shocks are of the hydraulic type, using an oil to dissipate the heat of friction to the outside air. They contribute to your vehicle's ride quality.

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Shock

Shock Absorber
A component using friction to dampen and control a vehicle's suspension up and down movement. Modern shocks are of the hydraulic type, using an oil to dissipate the heat of friction to the outside air. They contribute to your vehicle's ride quality.

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Shock Absorber

Shop Towel
Multi-purpose towels designed to absorb grease, oil, and other spills.

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Shop Towel

Short Circuit
A short circuit refers to the direct and generally unintended connection of a battery negative and positive terminal using an electrical conductor. Short circuiting a battery may result in rapid battery discharge, causing formation of hydrogen gas, sparks, heat and a generally dangerous situation.

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Short Circuit

Shorted Cell
A shorted cell refers to a condition where one or more negative plates within a cell come in contact with the positive plates. This condition generally results in a zero voltage or dead cell.

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Shorted Cell

Siphon Pump
Pump used to transfer most liquids. Used for changing oil, siphoning gas, and other jobs of that nature.

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Siphon Pump

Sleeves
Adjustable connecting sleeves attaching to the outer tie rods allow for directional changes from the Pitman arm to be transmitted equally to both sides, making them turn in unison.

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Sleeves

SLI
SLI is an abbreviation for starting, lighting and ignition, and is the designation of most automotive batteries.

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SLI

Slotted Rotors
Disc-shaped component that revolves with hub and wheel, have grooves cut along the face of the rotor where the pad makes contact their main purpose is to release heat and gases for better pad bite and to provide consistent stopping even after long time use.

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Slotted Rotors

Small Engine Oil
Oil used in smaller combustion engines, such as those in lawn mowers.

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Small Engine Oil

Smoke Detector
A safety device that alerts the presence of smoke either optically (photoelectric) or physically (ionization).

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Smoke Detector

Snap Ring
A type of fastener with an open-ended metal ring. Also known as a C-clip or retaining ring.

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Snap Ring

Snaking Effect
The "Snaking effect" is a term experienced while towing a travel trailer. In order to move the hitched vehicle in one direction, you must steer the vehicle in the other direction.

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Snaking Effect

Snow Chain
Fitted and attached to tires to add additional traction in extreme snow and ice.

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Snow Chain

Sockets
An electrical device receiving a plug or light bulb to make a connection

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Sockets

Solid Paint
Almost all cars are available in a no-cost basic, solid color. The most common options are white, red, blue or black.

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Solid Paint

Solenoid
Coil of wires that act as a magnet and carry electric current.

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Solenoid

Solenoid Switch
(Also called a starter relay) The solenoid switch sends an electric current to the starter, which sets the engine into motion.

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Solenoid Switch

Spacers
Spacers are used to change wheel bolt patterns and to widen the offset of the wheel. They bolt onto the studs of an axle in place of the wheel and have new studs for the wheels to attach to.

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Spacers

Spark Plug
A device containing two electrodes across which electricity jumps to produce a spark to fire the fuel charge. The center electrode is insulated from the spark plug shell by means of a molded insulator resembling Porcelain. The side electrode protrudes from the bottom edge of the spark plug shell and is so positioned that there is a gap between it and the center electrode.

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Spark Plug

Spark Plug Tube Seals
Protect the spark plugs by stopping oil within the valve cover from getting into the spark plug tube.

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Spark Plug Tube Seals

Spark Plug Wires
Connect an ignition coil, distributor, or magnet to the spark plugs in the engine of the vehicle.

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Spark Plug Wires

Spark Timing
Timing of ignition spark.

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Spark Timing

Spatter Paint
Paint that dries with a spatter finish

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Spatter Paint

Speciality Paints
Also known as custom paints. Examples include, metallic finish paints or chameleon paints. There are many other types of specialty paints that a professional paint shop may be able to recommend to you.

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Speciality Paints

Speedometer
A speedometer is a dashboard gauge that indicates a vehicle's traveling speed. Speeds are typically measured in miles per hour (MPH) and kilometers per hours.

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Speedometer

Speed Sensor
Type of tachometer. It is a device that is used for reading the speed of a vehicle's wheel rotation.

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Speed Sensor

Spinner Wheels
An inner wheel or hubcap ornament that rotates independently of the rim.

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Spinner Wheels

Splash Guard
Also known as mud flaps, splash guards are designed to keep, mud, rocks, and other debris from spraying onto a vehicle's exterior.

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Splash Guard

Split Flange
Used to strengthen or attach piping, a split flange is constructed of two interlocking pieces for ease of installation.

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Split Flange

Sponge
Tool or cleaning aid consisting off soft, porous material.

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Sponge

Squeegee
Scraping implement with a rubber-edged blade set on a handle that is typically used for cleaning windows.

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Squeegee

Stabilizer End Link
(Also called a sway bar link) Suspension end links connect the outer end of the sway bar to the suspension. In most vehicles sway bar links have ball joints at each end.

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Stabilizer End Link

Starter
The starter is the main component in the process involved in starting up vehicles. The starter is a direct current (DC) electric motor and starter solenoid, which is attached to the motor.

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Starter

Starter Relay
(Also called a starter solenoid) The starter relay sends an electric current to the starter, which sets the engine into motion.

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Starter Relay

Starter Switch
Switch in the control system of an internal combustion engine that activates the main electrical systems for the vehicle.

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Starter Switch

Starting Battery
A starting battery is a specific construction and design, where a large amount of momentary current is permitted to be drawn from the battery for starting purposes without consequential damage to the battery.

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Starting Battery

State of Charge
State of charge refers to the condition of a battery with respect to its design voltage and capacity.

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State of Charge

Stator
A self-contained unit of the magnetic pick-up, consisting of a permanent magnet, an inductive winding, and the pick-up core; the stator can be a disc-shaped pole piece with stator tooth or a simple pole piece. The fixed electrical windings on a magneto, alternator, or generator. It turns within the rotor.

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Stator

Steering Arm
Arms, either bolted to, or forged as an integral part of the steering knuckles . They transmit the steering force from tie rod to the knuckles, thus causing the wheels to pivot. Also called tie rod arm.

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Steering Arm

Steering Axis Inclination
The angle between the centerline of the steering axis and vertical line from center contact area of the tire (as viewed from the front). SAI is typically not adjustable, but deviations from specification can indicate vehicle damage. A maximum variation side to side of ± 1.0° may also indicate vehicle damage. This topic is covered in detailed charts later.

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Steering Axis Inclination

Steering Column
A shaft connecting the steering wheel to the steering gear assembly. Also called the steering shaft.

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Steering Column

Steering Shaft
A shaft connecting the steering wheel to the steering gear assembly. Also called the steering shaft.

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Steering Shaft

Steering System
The mechanism that allows the driver to guide the vehicle down the road and turn the wheels as he desires. The system includes the steering wheel, steering column, steering gear, linkages, and the front wheel supports.

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Steering System

Steering Wheel
Used by the driver to directionally steer a vehicle, a steering wheel connects to the steering column.

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Steering Wheel

Step Bar
Attached to the side of a truck or SUV to give an additional step up that eases the rider's entry into the vehicle's cab.

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Step Bar

Stop Leak
A product specifically designed to stop leaks in air conditioning system.

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Stop Leak

Stoplight Switch
Connects and break the circuit that turns a vehicle's brake lights on and off when applying the brakes.

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Stoplight Switch

Strobes
Device used to produce regular flashes of light.

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Strobes

Strut
Struts are part of your vehicle's suspension, and do the same job as a shock absorber. A vehicle will either have struts or shock absorbers, or a combination of both (i.e. struts in the front, and shock absorbers in the rear). They regulate how much your vehicle can move up and down, and keeps the tires in contact with the road surface after going over a bump.

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Strut

Strut Bar
A strut bar is a rigid bar designed to connect a vehicle's struts, thereby reducing flexibility in the chassis and improving handling. Also known as a strut tower brace.

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Strut Bar

Strut Boot
A durable housing designed to cover the entire strut shaft, a strut boot protects new struts from debris and wear.

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Strut Boot

Strut Cartridge
Although struts cannot be rebuilt, some strut assemblies have a replaceable strut cartridge that can be changed out instead of replacing the entire assembly.

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Strut Cartridge

Strut Mount
Strut mounts connect the vehicle’s suspension system to the vehicle body, and are located between the strut and the chassis at the upper strut attachment point. For the front fitting applications, the mount includes a bearing that serves as a steering pivot. Because these are load-bearing, worn strut mounts can affect a vehicle’s handling and safety.

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Strut Mount

Suction Gun
Tool for filling and draining parts like transmissions, differentials, and gear cases.

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Sunction Gun

Sulfation
Sulfation is a condition where lead sulfate crystals form in a battery, typically through a prolonged discharge condition. The lead sulfate precipitates to the bottom of the case, where it impedes electrical flow through the battery.

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Sulfation

Sump
A sump is a reservoir that collects unwanted water or liquids. In an engine, the oil pan or drain pan that collects engine oil is a sump.

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Sump

Sunshade
A foldable piece of material that can be placed in the windshield of a parked vehicle, a sunshade helps to keep temperatures lower and protect the interior of a vehicle from sun damage.

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Sunshade

Supercharger
Superchargers increase the power of an engine by compressing the air supplied to it. The increased air pressure or density gives the engine more oxygen letting it burn more fuel to increase the power.

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Supercharger

Surface Charge
Surface charge is the indicated state of voltage with a battery sitting at equilibrium and is not an indicator of the true condition of the battery. Before testing, it is necessary to remove the surface charge through momentary loading.

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Surface Charge

Suspension Stabilizer Bar
(Also known as a Sway Bar) The suspension stabilizer bar is a component in the suspension system that stops the car body from leaning too much (preventing rolling), and helps with stability during turns.

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Suspension Stabilizer Bar

Suspension System
A system that cushions the passenger compartment of the vehicle from the bumps and shocks caused by the wheels moving over irregular road surfaces. Includes springs, shock absorbers , steering linkage, upper and lower control arms, torsion bars, and stabilizers.

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Suspension System

Sway Bar
Component in the suspension system that stops the car body from leaning too much (preventing rolling) and helps with stability during turns.

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Sway Bar

Sway Bar Link
Sway bar links connect the outer end of the sway bar to the suspension. In most vehicles sway bar links have ball joints at each end.

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Sway Bar Link

Switch
A device that is used to complete or break a electrical circuit connection.

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Switch

Swivel Hanger
A swivel hanger is a type of exhaust mount. It is used to secure the exhaust pipe and absorb vibration from the exhaust system and keep it running more quietly.

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Swivel Hanger

System Evacuation
Evacuating a refrigeration system serves two primary objectives: To remove noncondensables and to dehydrate the air conditioning system (remove water vapor). If noncondensables such as air are not removed, the system will operate at higher than normal condensing pressures. If water vapor is not removed, it can cause a freeze at the expansion device, causing a block in the refrigeration process.

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System Evacuation
T

Tachometer
A gauge used to measure vehicle RPM's or engine speed.

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Tachometer

Tailgate Motor
The tailgate motor provides power to open and close the tailgate of a truck with a push of a button.

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Tailgate Motor

Tailpipe Extension
A tailpipe extension is an additional length of pipe that can be added to the tailpipe of a vehicle to add a personal touch to the exhaust of your car.

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Tailpipe Extension

Tail Light
Taillights are the housing and bulbs on the rear of a vehicle used to display running lights, as well as signal turns and braking.

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Tail Light

Tail Pipe
Pipe attached to the end of the muffler, it releases exhaust from the vehicle.

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Tail Pipe

Temperature Actuator
A temperature actuator - or blend door actuator - a mechanism that controls the temperature in the interior of a vehicle by combining cold and warm air.

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Temperature Actuator

Thermostat
A driver-operated device used to cycle the clutch to control the rate of refrigerant flow as a means of temperature control. A temperature-sensitive component located in a housing at the coolant outlet of the engine that restricts coolant flow to the radiator to maintain the desired engine-operating temperature.

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Thermostat

Thermal Expansion Valve
A component of the refrigeration system that regulates the rate of flow of refrigerant in the evaporator; as the refrigerant enters the TXV, as a high-pressured liquid, it expands reducing its pressure to become a low-pressure liquid. It then is able to enter the evaporator.

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Thermal Expansion Valve

Thread Repair Tool
Designed to repair damaged threads, thread repair tools cut and reshape internal and external threads to restore stripped and damaged threads.

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Thread Repair Tool

Threadlocker
Threadlocker - or thread locking fluid - is an adhesive used to improve sealing in threaded fasteners and prevent leaks and corrosion.

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Threadlocker

Throttle Body
Located between the intake manifold and air intake valve, the throttle body is a valve that regulates air flow to the engine. Driven by pressure on the gas pedal, more air is released, leading to more fuel being injected and ultimately more power output.

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Throttle Body

Throttle Body Intake
The throttle body intake controls the amount of air that flows into the engine in response to the accelerator pedal being pressed.

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Throttle Body Intake

Terminal Type
Terminal type refers to the design of the attachment point of the battery to the electrical system. Most automotive batteries are either a post style terminal or a threaded side terminal; however some today use a threaded design that resembles a flag.

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Terminal Type

Thermistor
A thermistor is a temperature compensating resistor and generally refers to the charge level compensation in an alternator regulator that is used to replenish the battery.

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Thermistor

Thermostat
A driver-operated device used to cycle the clutch to control the rate of refrigerant flow as a means of temperature control. Also known as a temperature-sensitive component that is located in a housing at the coolant outlet of the engine that restricts coolant flow to the radiator to maintain the desired engine-operating temperature.

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Thermostat

Throttle Body Base Gaskets
The body throttle gasket is the seal the keeps outside air from entering the space between the intake manifold and the throttle body.

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Throttle Body Base Gaskets

Throttle
The device that controls the vacuum created in the Venturi of the carburetor. The greater the vacuum, the richer the fuel-air mixture. The throttle enables the engine to run on a richer mixture and produce more power for high-speed driving.

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Throttle

Tie Rod
A rod, or rods, connecting the steering arms together. It links the pitman arm and the idler arm to the steering knuckle arms. When the tie rod is moved, the wheels pivot.

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Tie Rod

Tiller Steering
A steering device present on some very early automobiles before the steering wheel became the only car steering utility.

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Tiller Steering

Timing Belt
A flexible, toothed belt, the timing belt allows for smooth vehicle operation by synching the camshaft and crankshaft and controlling valve opening.

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Timing Belt

Tire
Molded rubber rings that provide traction for the vehicle while moving, and transfer the weight of the vehicle from the axle into the ground.

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Tire

Tire Cap
Plastic cap that screws over a tire valve.

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Tire Cap

Tire Cleaner
Formulated to quickly and easily clean both wheels and tires, including blackwalls and whitewalls.

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Car Covers

Tire Coating
An acrylic-based resin that forms a flexible, chemical-resistant coating on tires.

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Car Coating

Tire Foam
Product that uses foam to clean tires.

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Car Foam

Tire Gel
Product that can clean, rejuvenate, and/or condition tires.

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Car Gel

Tire Pump
Too used to inflate tires.

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Car Pump

Tire Shine
Product used to enhance gloss on tires.

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Tire Shine

Tire Valve Stem
Self-contained valve that opens to admit gas to a chamber.

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Tire Valve Stem

Tire Wall
One of several components that makeup a tire. Sidewalls protect cord plies and features tire markings and information, such as tire size and type.

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Tire Wall

Tire Wet
Product used to give tires a wet, glossy look.

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Tire Wet

Toe
Toe relates to the difference in the distance between the front of the tires and the rear of the tires on the same axle, or to the vehicle centerline. Toe-in, or positive toe, is defined as the front of the tires being closer together than the rear of the tires. Toe-out, or negative toe, is when the rear of the tires are closer together than the front of the tires.

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Toe

Toe out on Turns
When the vehicle negotiates a curve, the inner wheel turns more sharply and while the wheels remain in this position, a condition of toe-out exists.

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Toe out on Turns

Toe Shim
Used to correct any issues with the angle the wheel makes in relationship with a perfectly straight front to back alignment orientation.

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Toe Shim

Torque
A force that turns or tends to turn an object.

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Torque

Torque Converter
Typically taking the place of a manual clutch in vehicles with automatic transmissions, a torque converter is a hydrodynamic device designed to transfer power between the engine and the driving load. The converter multiplies torque and creates a type of "reduction gear."

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Torque Converter

Torque Wrench
Torque wrenches are designed to measure the specific amount pressure used to tighten a bolt. They look similar to a ratchet, and in many cases, include a ratchet arm.

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Torque Wrench

Torx Head Screw
A screw with a six-pointed star shape on the head, the torx screw is designed to reduce slippage and wear.

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Torx Head Screw

Touring Tire
Typically, all-season touring tires are designed for longer life and a comfortable, smooth ride on paved surfaces. Touring tires are usually offered in premium brands.

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Touring Tire

Towing Coupler
Fitted over a trailer ball or hitch, a towing coupler is designed to allow for towing and turning without the trailer becoming detached for the vehicle doing the towing.

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Towing Coupler

Towing Mirror
Towing mirrors are extended side view mirrors designed to allow for better visibility when towing a trailer or other type of hitched load.

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Towing Mirror

TPMS Sensor
TPMS - or tire pressure monitoring system - is used to notify drivers of equipped vehicles when tire pressure is below a safe operating level. Working with wheel speed sensors in a vehicle's anti-lock brake system, TPMS activates a dashboard warning light when pressure is outside of the recommended range.

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TPMS Sensor

Track Bar
Also known as a Panhard rod, a track bar is a suspension piece that connects the end of the axle to opposite side of the vehicle chassis. The purpose of the track bar is to limited lateral movement of the wheels.

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Track Bar

Track Width Difference
The measurement of the center of tire to center of tire or outer edge to outer edge.

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Track Width Difference

Trailer Hitch Ball
A trailer hitch ball connects the hitch receiver on the tow vehicle and the trailer being towed. It is designed to provide a secure connection and reduce sway during towing.

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Trailer Hitch Ball

Transaxle Gasket
Prevents leaking from the connection between the axle and the rear differential or transmission.

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Transaxle Gasket

Transfer Case Gaskets
A piece of thin compressible material such as cork, rubber, or soft metal, placed between two mating surfaces to form a seal.

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Transfer Case Gaskets

Transfer Case
A small transmission used on four-wheel-drive vehicles to transfer engine torque to the front and/or rear axles.

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Transfer Case

Transmission
Whether manual or automatic, a transmission in an automobile is used to transfer power from the engine to the drive wheels by changing the gear ratio while accelerating and decelerating. On manual transmission vehicles this is controlled by the driver through the use of the clutch. In a vehicle equipped with an automatic transmission, the torque converter provides the connection between the engine and transmission.

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Transmission

Transmission Additives
Whether manual or automatic, a transmission in an automobile is used to transfer power from the engine to the drive wheels by changing the gear ratio while accelerating and decelerating. On manual transmission vehicles this is controlled by the driver through the use of the clutch. In a vehicle equipped with an automatic transmission, the torque converter provides the connection between the engine and transmission.

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Transmission Additives

Transmission Control Solenoid
Directs transmission fluid into the valve body to engage the correct gear in the transmission.

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Transmission Control Solenoid

Transmission Cooler
Air moving over fins in the transmission cooler lowers the temperature of engine fluid that has run through the transmission. After the fluid is cooled, it is returned to the transmission in a continuous loop.

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Transmission Cooler

Transmission Filter
Transmission filters prolong the life of the transmission and its fluid by trapping potentially harmful particles and abrasives. A properly functioning filter ensures that transmission fluid is free from contaminants.

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Transmission Filter

Transmission Filter Gasket
Prevents leaks between the transmission pan and the transmission filter assembly.

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Transmission Filter Gasket

Transmission Fluid
Used to lubricate the working parts of the transmission. It is also used as a coolant in automatic transmissions.

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Transmission Fluid

Transmission Gaskets
Transmission gasket is a mechanical seal between the transmission oil pan and the transmission itself.

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Transmission Filter

Transmission Line Connector
Made to stop leaks between transmission lines or between the radiator and transmission.

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Transmission Line Connector

Transmission Modulator Valve
A transmission modulator valve uses a vacuum to control pressure on the throttle valve in lieu of a cable link in some vehicles equipped with an automatic transmission.

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Transmission Modulator Valve

Transmission Mount
Holds the transmission firmly to the car's frame and prevents any movement caused by the road.

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Transmission Mount

Transmission Pan
Holds the transmission fluid, and provides easy access to both the transmission fluid and transmission filter.

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Transmission Pan

Transmission Seal
The transmission seal is located between the input and output shafts, and prevents transmission oil from leaking.

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Transmission Seal

Transistor
Electronic device commonly used for amplification. A small semi-conductor electronic component, with no moving parts, that functions as a switch, amplifier, or detector by controlling the flow of current.

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Transistor

Trickle Charge
A trickle charge is a steady battery charger current that does not vary with the battery state of charge. Trickle charges are considered to be old technology and have largely given way to automatic battery maintainers.

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Trickle Charge

Truck Bed Coating
A rubberized or chemical coating applied to a truck bed or other surface to protect it from scratching, impact, and other damage from normal use.

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Truck Bed Coating

Truck Box
Available in a variety of sizes of styles, truck boxes are storage containers for the bed of a pickup truck. They can also provide security and protection from the elements and are often used for tools and small equipment.

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Truck Box

Truck Lock Cylinder
When the key is turned in a trunk lock, the trunk lock cylinder activates the latch and allows the trunk to open.

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Truck Lock Cylinder

Truck Paint
Paint used for truck parts.

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Truck Paint

Tune-Up
The intent of a tune-up is to obtain the maximum performance and economy of an engine with the lowest possible exhaust emissions so that the vehicle engine will meet the manufacturer's Specifications. It involves checking the components of the ignition, fuel, and emmission system and cleaning, adjusting, or replacing them. Tune-ups should be performed according to the recommendation of each manufacturer.

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Tune-Up

Turndown Pipe
An exhaust tip that is added to the system after the muffler. It is visible from the exterior of the cars, and is a way to add personal flare to your vehicle's exhaust system.

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Turndown Pipe

Turning Radius
The turning radius or turning circle of a vehicle is the diameter of the smallest circular turn (i.e. U-turn) that the vehicle is capable of making.

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Turning Radius

Turbocharger
Designed to improve power and efficiency in an internal combustion engine, a turbocharger uses an exhaust gas driven turbine to increase air flow in the engine's cylinders and allow the engine to burn fuel more quickly.

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Turbocharger

Twist Beam Suspension
The twist-beam rear suspension, also known as torsion-beam axle is a type of automobile suspension based on a large H or C shaped member. The front of the H attaches to the body via rubber bushings, and the rear of the H carries each stub-axle assembly, on each side of the car. The cross beam of the H holds the two trailing arms together, and provides the roll stiffness of the suspension, by twisting as the two trailing arms move vertically, relative to each other.

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Twist Beam Suspension

Two-paint Paint
Two-part paint products are those that need activators or hardeners to stimulate chemical bonding between the paint and the car’s surface, which is commonly known as drying or evaporating. Without activators, two-part paints have longer shelf life because they do not dry by themselves. They are also non-porous and weatherproof. You can apply a 2K primer on your car and leave it without having to worry about the rusting of your sheet metal.

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Two Paint Paint
U

Undercoat Finishes
Undercoat finishes are referred to as primers. Car paint primers are usually available in either grey or black and are used to 'prime' the surface of the vehicle and make it ready for painting. Primer is designed to help car paint better adhere to the vehicle by creating a binding layer that can bond to paint easier and more consistently than bare metal.undercoat-finishes.

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Undercoat Finishes

Understeer
The tendency for a vehicle, when negotiating a corner, to turn less sharply than the driver intends.

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Understeer

Universal Fit Catalytic Converter
Universal-fit converters can be made compatible with a number of vehicles with minor alterations.  

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Universal Fit Catalytic Converter

Universal Joint
Also called a U-joint, a universal joint is a coupling that allows for the transmission of rotary motion in a variety of angles. In automotive applications they are commonly used in the operation of the driveshaft in rear wheel drive vehicles.  

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Universal Joint

Urethane Paints
These paints are known for their heavy-body base and they last longer than enamel or lacquer based paints. Urethane paints are usually applied on engine parts and those parts which receive high temperature.

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Urethane Paints
V

V-Belt
V-Belts are traditionally found in older motors. V-belts run from the crankshaft, to power a variety of other parts such as the alternator or a/c compressor. Not replacing a v-belt can cause these accessories to stop working, or engine overheating.

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V-Belt

Vacuum Motor
Found on many four-wheel drive vehicles, the vacuum motor is used for switching between two and four wheel drive. It is a small motor inside the transfer case that moves the needed parts to change between the different drive modes.

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Vacuum Motor

Valve Cover
A metal cover on the top of the engine, a valve cover and the corresponding gasket work together to provide a seal and prevent oil leaks.

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Valve Cover

Valve Cover Gaskets
The valve cover is a metal cover that is found on very top of the engine. The valve cover is attached to the engine by a gasket made of rubber or cork.

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Valve Cover Gaskets

Valve Stem Seals
Valve stem seals are engineered to allow a small amount of oil to pass through their oil-metering to lubricate the valve stem interface of an engine.

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Valve Stem Seals

Valve Stem
A device mounted in the rim or inner tube to provide a method of increasing or decreasing air pressure inside a tire.

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Valve Stem

Valve Timing Solenoid
Controls the flow of oil to the variable valve timing system as it engages.

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Valve Timing Solenoid

Vapor Canister
Part or the emissions system, it traps the fuel that would be evaporated and returns it to the fuel tank.

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Vapor Canister

Vent
Any opening serving as an outlet or inlet for air.

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Vent

Ventilation
The circulation of flow of air through openings; the direction of ambient cabin air through openings to other sections of the vehicle.

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Ventilation

Vinl/Fabric Paint
Usually offered in a spray application, vinyl and fabric paint - or coating - can be used to restore or customize automotive upholstery in a variety of OEM and aftermarket colors.

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Vinyl/Fabric Paint

Voltage
Voltage is a measure of electrical pressure. All batteries are rated in volts DC (Direct Current).

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Voltage

Voltage Delay
Voltage delay is the time required after an electrical load is applied for a battery to deliver the requisite voltage.

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Voltage Delay

Voltage Depression
Voltage depression is an unexpected drop in battery voltage below anticipated values during the discharge of a battery.

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Voltage Depression

Voltage Regulator
A voltage regulator is a device that controls the charging output of an alternator or generator so as to maintain charge volts within defined parameters.

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Voltage Regulator

Voltmeter
A volt meter is a device that measures and indicates the voltage within an electrical system or electrical circuit.

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Voltmeter
W

Wash Brush
Brush used to wash objects such as a vehicle.

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Wash Brush

Washer
A thin metal plate - typically circular - with a hole in the center, a washer is a common piece of hardware used to evenly distribute pressure from threaded fasteners in a wide variety of applications.

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Washer

Washer Fluid
Fluid used to clean your windshield, housed in the windshield washer fluid reserve.

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Washer Fluid

Water Neck
Also known as a thermostat housings, the water neck covers and protects the thermostat and directs the coolant flow from open valves.

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Water Neck

Water Outlet Gasket
A water outlet gasket is designed to create a seal between the water outlet housing and intake manifold.

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Water Outlet Gasket

Water Temperature Gauge
Indicates the temperature of the water flowing around the engine; if the temperature is too high, it could indicate that a problem has occurred in the cooling system.

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Water Temperature Gauge

Waterborne Enamels
Due to the rise of environmental concerns, the water-based acrylics, waterborne and urethane paints are developing faster. You can apply waterborne enamels on primers or bare metal or present coatings. For DIY car finishers, these paints are safe and widely-known option to work from personal garage.

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Waterborne Enamels

Waterless Car Care
The washing of the exterior of an automobile without using water, and only using car care products.

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Car Covers

Water Pump
The primary function of the water pump is to circulate antifreeze, so that it can travel to and from the engine, radiator and heater core.

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Water Pump

Water Resistant Car Cover
Treated for moisture repellency. These types of covers will repel most of the water yet allow air to circulate, preventing condensation. Most have ultraviolet screens woven into the mesh to help them withstand sunlight degradation and are usually mildew resistant.

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Water Resistant Car Cover

Waterproof Car Cover
Waterproof car covers are usually plastic film or a plastic-coated fabric and will keep the rain off your car, but will also trap condensation between the cover and your car. The plastic type of car cover is useful if you store your car over the winter in a garage and use a flannel cloth cover against the surface and the plastic one as an outer protective shield.

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Waterproof Car Cover

Water Inlet
A pipe that brings water into a machine or a room.

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Water Inlet

Water Pump Gaskets
The water pump gasket is a simple sheet comprised of gasket paper, rubber, silicone, metal, felt, and fiberglass or plastic polymer. It fills the gap between the engine and the water pump in your vehicle.

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Water Pump Gaskets

Weatherproof Car Cover
Fabric sheds water as soon as it hits the car cover, leaving your vehicle dry.

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Weatherproof Car Cover

Weatherstripping
In automotive applications, weatherstripping is EPDM rubber or silicone stripping used around the doors, windows, trunk, sunroof, and other openings to prevent noise and weather elements from penetrating the vehicle interior.

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Weatherstripping

Welding Helmet
Protective gear for the head and face to be worn when welding. Constructed of flame-retardant materials with a built-in visor for visibility.

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Welding Helmet

Welding Rod/Welding Wire
Technically known as welding electrodes, welding rods are metal rods or wires that are melted down in the welding process to created joints. Welding rods can contain a number of different metals depending on the application, including iron, steel, brass, copper, and aluminum.

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Welding Rod/Welding Wire

Wheel Bearing
Found inside the hub, they are a set of steel balls that enable the wheel to spin freely while the car is in motion.

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Wheel Bearings

Wheel Arch Molding
Wheel arch or wheel well molding is rubberized or hard plastic molding pieces or strips designed to protect the wheel wells of a vehicle.

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Wheel Arch Molding

Wheel Chock
A heavy-duty wedge used - along with the braking system - to keep a vehicle from moving while parked.

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Wheel Chock

Wheel Cover
A wheel cover is a decorative accessory that covers the entire wheel for protection or customization without replacing the wheel itself.

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Wheel Cover

Wheel Cylinder
Located in the wheel, a wheel cylinder works within a drum brake system by forcing contact between the brake shoe and brake drum and creating friction.

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Wheel Cylinder

Wheel Hub
Wheel hubs are the mounting assembly that keeps the wheel spinning while keeping it attached to the vehicle.

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Wheel Hub

Wheel Paint
Available in a wide variety of colors, wheel paint can be used to restore or customize a vehicle's wheels, as well as provide protection.

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Wheel Paint

Wheel Speed Sensor
(Also called an ABS speed sensor)Used to monitor the speed of the wheels and send the information to the ABS computer, so that during an emergency stop the wheels don't lock up.

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Wheel Speed Sensor

Wheel Stud
Threaded bolt-like fasteners that combined with the lug nuts hold the wheels on a vehicle. They are attached directly to the wheel hub.

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Wheel Stud

Wheel Weight
Small metal weights - usually steel or zinc - used to balance the tire and wheel.

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Wheel Weight

Whitewall Tires
Tires having a stripe or entire sidewall of white rubber, popular on cars made prior to the 1980s.

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Whitewall Tires

Window Motor
Provides the power that is needed to raise and lower the window. It is powered by a switch on the panel of the door.

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Window Motor

Windshield Washer Pump
The windshield washer pump in a vehicle pressurizes windshield washer fluid from the reservoir so it can be applied through nozzles onto the windshield.

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Windshield Washer Pump

Windshield Washer Reservoir
The windshield washer reservoir - or windshield washer tank - is a plastic container fitted near the engine of a vehicle that stores extra windshield washer fluid.

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Windshield Washer Reservoir

Windshield Wiper
Rubber blade attached to a metal arm that moves across the windshield in an arc to keep it clear of rain and debris.

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Windshield Wiper

Windshield Wiper Arm
The structure that holds the wiper blade against the windshield.

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Windshield Wiper Arm

Windshield Wiper Blade
A rubber blade that connects to the wiper arm and sweeps rain, snow, and other elements off of a vehicle's windshield.

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Windshield Wiper Blade

Wing Nut
A small piece of hardware, a wing nut is a nut that can be tightened by hand through the use of small built on tabs.

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Wing Nut

Wiper Motor
Provides the power needed to create the back-and-forth motion used to clean the windshield.

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Wiper Motor

Wire Brush
A handheld or power tool accessory with steel bristles used for heavy duty cleaning, paint removal, and a variety of other applications.

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Wire Brush

Wiring Harness
Assembly of electrical cables or wires that transmit signals or electrical power.

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Wiring Harness

Worm and Sector
A type of steering gear that looks like a bolt & nut, but the sector of this type looks like a gear instead of a nut. The teeth of the sector are machined in an arc or curve to look like a section of the gear.

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Worm and Sector

Wheel
A wheel is a round object that is intended to rotate on a bearing. Wheels, in conjunction with axles, allow heavy objects to be moved easily moved or rolled.

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Wheel

Wheel Cleaner
Formulated to quickly and easily clean both wheels and tires.

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Car Covers

Wheelbase Difference
The wheelbase of a vehicle equals the distance between its front and rear wheels. At equilibrium, the total torque of the forces acting on a vehicle is zero.

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Wheelbase Difference
X
Y

Y Pipe
A Y pipe is an exhaust pipe designed improve exhaust flow and increase horsepower by splitting the I pipe from the exhaust manifold. Y pipe can also refer to a two-into-one fitting for air intake systems.

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Y Pipe
Z