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Learn More About Brakes
Brake BoosterBRAKE SYSTEM OVERVIEWPADS & SHOESROTORS & DRUMSCALIPERSWHEEL CYLINDERSMASTER CYLINDERBRAKE BOOSTERBRAKE HOSES & LINESBRAKE HARDWAREDO-IT-YOURSELF
Brake Boosters - What you need to know
With the engine stopped, depress the brake pedal normally, several times. The brake pedal must be depressed before the engine is started in order to remove vacuum from the booster.

With the brake pedal depressed start the engine. When the engine is started, vacuum is created and operates the booster. This causes the pedal to go down.

If the brake pedal goes down slightly, the booster is operating normally. If the brake pedal does not move, the booster is not receiving manifold vacuum, or is malfunctioning.

Learn all about your vehicle's brake system at Pepboys.com

Brake BoosterBrake Booster
The brake booster is designed to create a greater braking force from minimum pedal effort, using a difference in atmospheric pressure and the engine's manifold vacuum. It increases the pedal force 2 to 4 times depending on the size of the diaphragm. The brake booster is located between the brake pedal and the master cylinder.

When pressure is applied to the brake pedal, pressure is exerted on the booster air valve. With pressure created by the booster the master cylinder is applied. Should the booster malfunction, the normal mechanical force of the master cylinder is maintained.
Prostop Brake Boosters
We have the largest selection of brake boosters in the market from one of the most trusted manufacturers in the country.
Brake Booster Advantage
Brake Booster Advantage
  • OE performance and reliability
  • Exclusive rust-prohibitive finishing process
  • Extends on-car and on-shelf life
  • Master Cylinder Output Rods are Pre-adjusted when included
  • Saves service dealer time and ensures easy and proper installation