See Details

25% Off Online Orders of Select Hard Parts. Enter Promo Code MMJ30 in Cart.

Close (X)

Receive Up To 25% Off Your Online Purchase Of Select Parts And Accessories
Use promotional code MMJ25 at checkout to receive 25% off the following categories: Select Brake Parts, Water Pumps, Belts, A/C Parts, Starters, Alternators, Fuel Pumps, Radiators, Radiator Fans, Thermostats, Caps & Clamps, Clutches, Plug Wires, Chassis, CV Axles, Batteries, Battery Chargers & Booster Cables, OE Locks, Rack & Pinons, Window Motors, RainX Wipers, Appearance Chemicals, Car Wash Accessories, Floor Mats, Lift Equipment, Hand Tools, Travel Accessories, Outdoor Lifestyle, Towing, Car Covers, Seat Covers, Wheel Covers, Body Repair, Collectibles and Apparel.

Use promotional code MMJ20 at checkout to receive 20% off the following categories: Shocks & Struts, Ignition, Bearings & Seals and Engine Parts.

Offers not valid in combination with any other discounts, promotions or items already on sale. Not valid on gift cards, special orders, installed 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 the following brands: Champion, Powerstop, Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, Thule, Thule Karrite, JVC, Flowmaster, Hurst, B&M, MSD, Moog, Wagner, Philips and BBK Performance. Valid online until 2:59 am EST on 7/3/17.

Free Shipping on Orders Over $50 or in-store pickup

Bosch Platinum +4 Spark Plug 8809728
Zoom [+]
  • Part #: 4459|
  • SKU: 8809728

Available today

Pay in Store Available

    • Revolutionary surface air gap firing technology featuring multiple spark paths that delivers the longest, most powerful spark for ultimate engine performance
    • More platinum vs. Bosch Platinum plus for smoother acceleration, top fuel economy and maximum engine power

Bosch Platinum +4 Spark Plug

If you require the best in platinum performance over the longest service life, Platinum+4 is the spark plug for you. Platinum+4's unique revolutionary firing technology combines the advantages of surface air gap technology, four yttrium-enhanced ground electrodes, and a heat-fused center electrode with the most platinum, creating the most powerful spark you can buy.
  • Revolutionary surface air gap firing technology featuring multiple spark paths that delivers the longest, most powerful spark for ultimate engine performance
  • More platinum vs. Bosch Platinum plus for smoother acceleration, top fuel economy and maximum engine power
  • Four yttrium enhanced ground electrodes provides optimum access to the air/fuel mixture for the most efficient combustion, plus the yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life
The Bosch Group is a leading global supplier of automotive and industrial technology, consumer goods and building technology. As one of the leading automotive suppliers in North America, the Automotive Technology business has approximately 30 primary locations and is Bosch's largest business sector in North America.

Spark Plug Wire Electrode Core Material
Side Electrode Tip Material
Spark Plug Insulator Type
Short Style Spark Plug
Spark Plug Reach (In)
Spark Plug Drive Size
5/8 in
Spark Plug Thread Size (mm)
Center Electrode Tip Material
Spark Plug Seat Style


Bosch Platinum +4 Spark Plug is rated 4.5 out of 5 by 26.
Rated 1 out of 5 by from This product does not fit my 2010 Mazda 5 This product did not fit my 2010 Mazda 5 with the 2.3L engine. The thread reach was not long enough. The reach should be .98 inches. Looks like it was well made but the threads were too short.
Date published: 2015-07-03
Rated 5 out of 5 by from Great improvement! Increase in power and overall performance! Worth the extra pennies!
Date published: 2015-01-13
Rated 5 out of 5 by from Awesome for BMW E36s The plugs are perfect for my 1994 BMW 325is!
Date published: 2014-12-26
Rated 5 out of 5 by from Excellent product. I highly recommend it to all of you. Excellent product that provided superior high performance.
Date published: 2014-12-02
Rated 5 out of 5 by from Great Experience ! Excellent business. Great Spark Plugs. Will buy from again and again!!
Date published: 2014-11-10
Rated 5 out of 5 by from Installed on a 99 Saturn works great. Car seems to run better with these plugs. Also don't have to set gap.
Date published: 2014-10-19
Rated 5 out of 5 by from multiple tip heads work better truck runs like a champ!
Date published: 2014-08-24
Rated 5 out of 5 by from This product was perfect for my project Great price! Great product! Pepboys always there to help me.
Date published: 2014-07-08
Rated 5 out of 5 by from Quality Product Bought these to install in my 1991 Chevy Caprice. It had been about 5 years since I last changed the plugs on the car. I changed these out along with the spark plug wires. Simple to install. It's been about 2 months since installing them and I can already see the savings in the gas mileage! Will definitely purchase again for my other vehicles. Plus I was able to get the extra 20% off deal that Pep Boys is offering on them when I purchased them!
Date published: 2014-04-19
Rated 5 out of 5 by from Power I use these because power wise they are the only ones I notice an increased difference with when I drag race at Englishtown NJ and in my regular cars, they look kind of ridiculous, I've tried them against E3's and all the others, My gas mileage does seem to go down a hair but maybe that's just my aggressive foot, they don't crack apart like some plugs will over time and high RPM's if you want gas mileage go with Autolite Double platniums they are the best for that
Date published: 2014-03-10
Rated 5 out of 5 by from Great Spark Plug! I have been buying these spark plugs for my Chevy's since they first came out. I will never buy anything else. 5 Star and I would recommend these to anyone with a Chevy. Not sure how they do in other makes.
Date published: 2014-02-02
Rated 5 out of 5 by from Quality product I am happy I was able to install the Bosch platinum spark plug in my car. The car runs smoother now. It was a great deal from Pep Boys at the right price.
Date published: 2014-01-13
Rated 5 out of 5 by from Easy to install, works like a charm, no gapping required! Overall great sparkplugs. Replaced my previous set of Bosch platinum plugs which worked well and lasted. Easy to install and no gapping required.
Date published: 2013-11-30
Rated 5 out of 5 by from Excellent Spark Plugs 4 Great Price! Since I installed these Sparks Plugs My Bimer star easily in the morning. No more misfires and fuel efficiency has improved in 10% better performance. They are Awesome! I cant wait to get my rebate on the mail.
Date published: 2013-10-17
Rated 1 out of 5 by from Didn't Perform Well In My Car These Bosch spark plugs didn't perform good in my 1998 Honda Civic. I will return them back to Pep Boys for a refund.
Date published: 2013-08-31
Rated 5 out of 5 by from Great price and increased power and fuel economy Bought these and went 4000 mile round trip to Nebraska and back increased power and increased mileage by almost 5 miles a gallon average both city and highway will use them again in my other cars./
Date published: 2013-07-10
Rated 5 out of 5 by from Bosch platinum +4 Bosch is a solid spark plug all around. I installed them on a 07 Honda Odyssey and after only a week the gas mileage increased by 10% as well as greater acceleration and smoother idle. I highly recommend it since they are found on most high end German automobiles. I know I'll be fine for another 100k miles.
Date published: 2013-06-21
Rated 5 out of 5 by from Fixed my issues.. They work as claimed. And fixed the issues I was having because of my old plugs.
Date published: 2013-04-18
  • y_2017, m_3, d_5, h_1
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0
  • cp_2, bvpage2n
  • co_hasreviews, tv_0, tr_26
  • loc_en_US, sid_8809728, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_pepboys
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.