Platinum+4 Spark Plug
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Bosch Platinum+4 Spark Plug

Part No. 4458 Warranty  

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The Bosch Platinum+4 spark plug features unique revolutionary firing technology that combines the advantages of surface air gap technology, 4 nickel-yttrium ground electrodes and a heat-fused center electrode with pure platinum to provide optimum engine performance, smoother acceleration and top fuel efficiency.

Product Features:
  • Revolutionary surface air gap firing technology, featuring multiple spark paths, delivers a powerful spark for ultimate engine performance
  • Offers smoother acceleration, top fuel economy and maximum engine power
  • 4 yttrium-enhanced ground electrodes provide optimum access to the air/fuel mixture for the most efficient combustion; yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life
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Electrode Core Material:Nickel-Yttrium and Copper and Platinum
Electrode Tip Material:Platinum
Ground Strap Quantity:4
Insulator Type:Pyranit
Manufacturer Heat Range:8
Resistor:Yes
Shorty Spark Plug:No
Spark Plug Seat Type:Tapered
Tip Configuration:Surface
Type:HGR8DQP

REVIEW SNAPSHOT®

by PowerReviews
BoschPlatinum+4 Spark Plug
 
4.0

(based on 23 reviews)

Ratings Distribution

  • 5 Stars

     

    (16)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (5)

73%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (13)
  • Increases power (13)
  • Easy to install (12)
  • Durable (6)
  • Lightweight (3)

Cons

  • No improvement in performance (4)

Best Uses

  • Everyday driving (10)
  • Replacement (9)
  • Performance driving (3)
    • Car & Truck:
    • Truck enthusiast (4), Casual driver (3), Mechanic (3)
    • Reviewer Profile:
    • Casual driver (7), Truck enthusiast (5), Auto enthusiast (3), Mechanic (3)

Most Liked Positive Review

 

Very Good Quality Plug

Purchased these plugs for my 2000 Chevy Blazer 4.3,took advatage of the online discount, replaced the oem ac delco plugs which wernt bad or worn out, wanted to see if fuel mpg would...Read complete review

Purchased these plugs for my 2000 Chevy Blazer 4.3,took advatage of the online discount, replaced the oem ac delco plugs which wernt bad or worn out, wanted to see if fuel mpg would go up, was surpirsed that the engine actually felt smoother at idle and more responsive, mpg appears to be better, will know by next fillup,

VS

Most Liked Negative Review

 

Don't do it I was fooled

I have a 1996 Chevy silverado k1500 z71 5.7liter and I replaced my old ac delcos at 160000 miles because the started to misfire not bad for as many miles they had on them. ...Read complete review

I have a 1996 Chevy silverado k1500 z71 5.7liter and I replaced my old ac delcos at 160000 miles because the started to misfire not bad for as many miles they had on them. I wanted to upgrade to what I thought was a better plug but after 15000 miles they started misfiring. They were covered with thick black carbon. I learned my lesson so I went back to ac delco iridium plugs and my truck is like brand new again. Don't get me wrong I loved the Bosch plugs when they were new. The truck ran awesome. They just aren't built to last.

Reviewed by 23 customers

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Displaying reviews 1-10

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(1 of 1 customers found this review helpful)

 
5.0

Great Plugs

By Will

from Lakeville, MN

About Me Auto Enthusiast, Mechanic, Truck Enthusiast

Verified Buyer
Level 1

Pros

  • Durable
  • Last Set Lasted 110k

Cons

    Best Uses

      Comments about Bosch Platinum+4 Spark Plug:

      The spark plugs showed up when they were promised and installed easily. The old set of the same plugs had 110K miles on them and had fairly little discernable wear. It's nice not having to gap the plugs.

      Comment on this review(earn points)

      (2 of 2 customers found this review helpful)

       
      1.0

      Don't do it I was fooled

      By Jim

      from Marion,OH

      About Me Truck Enthusiast

      Pros

      • Improves Engine Efficiency
      • Increases Power

      Cons

        Best Uses

        • Replacement

        Comments about Bosch Platinum+4 Spark Plug:

        I have a 1996 Chevy silverado k1500 z71 5.7liter and I replaced my old ac delcos at 160000 miles because the started to misfire not bad for as many miles they had on them. I wanted to upgrade to what I thought was a better plug but after 15000 miles they started misfiring. They were covered with thick black carbon. I learned my lesson so I went back to ac delco iridium plugs and my truck is like brand new again. Don't get me wrong I loved the Bosch plugs when they were new. The truck ran awesome. They just aren't built to last.

        Comment on this review(earn points)

        (3 of 5 customers found this review helpful)

         
        5.0

        item great but havent received rebate

        By Paul

        from Crossville, TN

        Verified Buyer
        3 or more reviews submitted

        Comments about Bosch Platinum+4 Spark Plug:

        item great but havent received rebate

        Comment on this review(earn points)

        (3 of 5 customers found this review helpful)

         
        5.0

        Huge Improvement!

        By LR RANGER

        from Fayetteville, NC

        About Me Casual Driver, Truck Enthusiast

        Ask me a question

        Level 3

        Pros

        • Improves Engine Efficiency
        • Increases Power

        Cons

          Best Uses

          • Everyday Driving
          • Replacement

          Comments about Bosch Platinum+4 Spark Plug:

          Replaced Autolite platinum with Bosch+4 Immediate improvement in power and performance. Had "spark knock" on acceleration which is now gone. Lots more power throughout gears and RPM ranges. Well worth doing...I have 162K miles and it now runs better than ever. I was constantly using injector cleaners through the engine to attempt to correct spark knock. I would have never guessed one small change could make such a big difference. Fuel economy has improved as well due to increase in power.

          Comment on this review(earn points)

          (2 of 4 customers found this review helpful)

           
          5.0

          best plug on market

          By john

          from erie pa

          About Me Casual Driver

          Ask me a question

          Verified Buyer
          Level 3

          Pros

          • Durable
          • Improves Engine Efficiency
          • Increases Power

          Cons

            Best Uses

            • Everyday Driving

            Comments about Bosch Platinum+4 Spark Plug:

            price was good product was excellent would buy again

            Comment on this review(earn points)

            (3 of 5 customers found this review helpful)

             
            1.0

            If you own a gm, do. not. buy.

            By keith

            from michigan

            About Me Auto Enthusiast

            Pros

            • Easy To Install

            Cons

            • Decreases Gas Mileage
            • No Improvement In Performance

            Best Uses

              Comments about Bosch Platinum+4 Spark Plug:

              do not buy these if you have a gm, 2003 blazer, threw a code, made the engine tick, lost serious mpg, swapped with ac delco, tick went away, and code cleared itself, disappointed in bosch, will not be buying anything they make for my truck again.

              Comment on this review(earn points)

              (2 of 4 customers found this review helpful)

               
              5.0

              good performance

              By theplungerboy

              from flushing MI

              About Me Auto Enthusiast

              Verified Buyer
              Level 1

              Pros

              • Easy To Install
              • No Gaping Needed

              Cons

              • None at this time

              Best Uses

              • Everyday Driving
              • Replacement

              Comments about Bosch Platinum+4 Spark Plug:

              out of the box ready to go easy install

              Comment on this review(earn points)

              (3 of 5 customers found this review helpful)

               
              2.0

              Go With AC Delco Iridiums

              By JD

              from Milton, NH

              About Me Diyer

              Pros

              • Easy To Install

              Cons

              • No Improvement In Performance
              • Short Lifespan

              Best Uses

              • Christmas tree ornament

              Comments about Bosch Platinum+4 Spark Plug:

              The plugs worked only okay for a little while. Then the 4.3L V-6 in my Chevy 1500 pickup started running rough after about 25,000 miles and I pulled a plug, and they were already needing to be replaced. The 4 prongs allows carbon to easily collect which led to plug fouling and bad spark. I took my truck to the shop and the mechanic told me to replace them with AC Delco Iridiums. I did so and the Iridiums put these to shame. Save the trouble and go with AC Delco Iridiums from the beginning.

              Comment on this review(earn points)

              (2 of 4 customers found this review helpful)

               
              5.0

              Well worth the money!!

              By ride 787

              from Radford, VA

              About Me Casual Driver

              Verified Buyer
              Level 1

              Pros

              • Improves Engine Efficiency
              • Increases Power

              Cons

                Best Uses

                • Everyday Driving
                • Performance Driving

                Comments about Bosch Platinum+4 Spark Plug:

                Great product and well worth the money spent!!

                Comment on this review(earn points)

                (2 of 4 customers found this review helpful)

                 
                5.0

                This made my escape run so much better.

                By waterworld

                from deltona fl

                About Me Truck Enthusiast

                Verified Buyer
                Level 1

                Pros

                • Easy To Install
                • Improves Engine Efficiency
                • Increases Power
                • Run So much better

                Cons

                • none

                Best Uses

                  Comments about Bosch Platinum+4 Spark Plug:

                  Great product

                  Comment on this review(earn points)

                  Displaying reviews 1-10

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                  Do you have questions about this product?(earn points for answers!)

                   

                  Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                  4 Questions | 5 Answers
                  Displaying questions 1-4
                  • Q:

                    Do you recomend this for an 04 mazda 6 sw v6 over doubble platinum?
                    Asked on 2/5/2013 by basscannon6

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Yes, this Bosch Platinum+4 Spark Plug - part# 4458 features unique revolutionary firing technology that combines the advantages of surface air gap technology, 4 nickel-yttrium ground electrodes and a heat-fused center electrode with pure platinum to provide optimum engine performance, smoother acceleration and top fuel efficiency and is an exact fit for your 2004 Mazda 6. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                      Answered on 2/5/2013 by Vincent from AAP
                  • Q:

                    Do you recommend these plugs for a 1997 Cadillac Eldorado? If not, then what plugs do you recomment?
                    Asked on 5/20/2011 by Rich

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Yes, these are the best spark plugs for your vehicle.

                      Answered on 5/20/2011 by DIY Daniel from AAP
                  • Q:

                    Does this spark plug come in 1 or 2 units per package?
                    Asked on 5/15/2010 by Anonymous

                    2 answers

                    • CUSTOMER CARE

                      A:

                      This is a single spark plug.

                      Answered on 5/17/2010 by Mike from AAP
                    • A:

                      1 plug per box

                      Answered on 6/10/2010 by Walt from Pittsburgh, PA
                  • Q:

                    i'm thinking of trying these in my 1996 buick sta-wag,i've owned 3 buicks with this engine and got 25-27 mpg, but this one only about 18 mpg,i've done all the regular stuff when milage drops off,ie: fuel filters,air filters,tire pressure,new tires,etc,made no difference.i now have 94k on it so its time for plugs anyway.any advice is appreciated and any opinions on these plugs.
                    Asked on 12/15/2009 by 6-47mm from abilene,texas

                    1 answer

                    • VERIFIED BUYER

                      A:

                      i have installed them in my buick roadmaster and the mileage and performance has improved

                      Answered on 1/15/2010 by chevy man from north granby ct
                  Displaying questions 1-4

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