OE Fine Wire Iridium Spark Plug
Hover over the image to zoom in
Share this:

Bosch OE Fine Wire Iridium Spark Plug

Part No. 9603 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

Bosch OE Fine Wire Iridium. The only iridium spark plug line engineered for both High Performance and Long Life. The ultra fine wire design and laser welded, tapered ground electrode delivers the ultimate in High Performance. The laser welded iridium tipped center and ground electrodes (Double Iridium) provide exeptionally Long Life.

Product Features:
  • Double iridium- Iridium on the ground and center electrodes for longer life and increased performance
  • OE Fine Wire design requires up to 24% less voltage to ignite
  • Pre-gapped and nickel plated threads allow for quick installation without adjusting the gap or applying anti-seize
  • 360 degree continuous laser welding increases durability for increased life
  • Tapered ground electrode allows for better ignition throughout the life of the spark plug
Back To Top
Center Electrode Core Material:Nickel-Yttrium and Copper and Iridium
Center Electrode Tip Material:Iridium
Ground Electrode Quantity:1
Hex Size:16
Insulator Material:Ceramic
Reach:19 mm
Seat Type:Flat

REVIEW SNAPSHOT®

by PowerReviews
BoschOE Fine Wire Iridium Spark Plug
 
4.8

(based on 9 reviews)

Ratings Distribution

  • 5 Stars

     

    (7)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to install (6)
  • Increases power (6)
  • Improves engine efficiency (5)
  • Durable (4)

Cons

No Cons

Best Uses

  • Everyday driving (7)
  • Replacement (4)
    • Reviewer Profile:
    • Auto enthusiast (5), Casual driver (5)

Reviewed by 9 customers

Displaying reviews 1-9

Back to top

 
5.0

very nice

By 

from mi.

About Me Casual Driver

Verified Buyer

Pros

  • Durable
  • Easy To Install
  • Increases Power

Cons

    Best Uses

    • Everyday Driving
    • Replacement

    Comments about Bosch OE Fine Wire Iridium Spark Plug:

    there good for the money

    Comment on this reviewHelp Icon

     
    5.0

    bosch man rules

    By 

    from wilson

    About Me Auto Enthusiast

    Verified Buyer

    Pros

    • Durable
    • Easy To Install
    • Improves Engine Efficiency
    • Increases Power
    • Lightweight

    Cons

      Best Uses

      • Everyday Driving
      • Performance Driving

      Comments about Bosch OE Fine Wire Iridium Spark Plug:

      Easy the best purchase of my year. Why? Needed plugs badly and the rebate broke the deal. Game changer. SIX PLUGS with coupon and then the rebate. Now they owe me 1 DOLLAR. Don't forget about the quality.

      Comment on this reviewHelp Icon

       
      5.0

      Replaced in '02 Highlander V-6

      By 

      from Virginia Beach, VA

      About Me Auto Enthusiast, Casual Driver

      Verified Buyer

      Pros

      • Improves Engine Efficiency
      • Increases Power

      Cons

        Best Uses

        • Everyday Driving
        • Replacement

        Comments about Bosch OE Fine Wire Iridium Spark Plug:

        These spark plugs were listed as direct replacements for the NGK plugs that came OEM from Toyota. After ~120K miles, the NGKs in my wife's '02 Highlander V-6 were due for replacement. These went in like any other spark plug replacement and the change in performance was noticeable (and my wife is happy again :)

        On a side note: for those with this vehicle or similar, be prepared to remove the intake in order to replace the back 3 plugs (near firewall). Replacing the plugs was easy, removing/replacing the intake was NOT.

        Comment on this reviewHelp Icon

        (0 of 1 customers found this review helpful)

         
        4.0

        Good product

        By 

        from MD

        About Me Auto Enthusiast

        See all my reviews

        Verified Buyer
        3 or more reviews submitted

        Pros

        • Durable
        • Easy To Install
        • Improves Engine Efficiency
        • Increases Power

        Cons

          Best Uses

          • Everyday Driving

          Comments about Bosch OE Fine Wire Iridium Spark Plug:

          Straight forward application.

          Comment on this reviewHelp Icon

          (1 of 2 customers found this review helpful)

           
          4.0

          Dont Believe the hype

          By 

          from Rincon Ga.

          About Me Auto Enthusiast, Casual Driver

          Verified Buyer

          Pros

          • Easy To Install

          Cons

          • No Improvement In Performance

          Best Uses

          • Everyday Driving

          Comments about Bosch OE Fine Wire Iridium Spark Plug:

          Iridium plugs either work or they don't. Don't believe the hype that your engine will improve its performance and efficiency. Unless the plugs ar completely SHOT and causing misfire you will not notice an improvment.

          Comment on this reviewHelp Icon

          (1 of 2 customers found this review helpful)

           
          5.0

          Great Spark Plugs

          By 

          from Metairie

          About Me Auto Enthusiast, Casual Driver

          See all my reviews

          Verified Buyer
          3 or more reviews submitted

          Pros

          • Acceleration
          • Durable
          • Easy To Install
          • Improves Engine Efficiency
          • Increases Power
          • Lightweight

          Cons

            Best Uses

            • Everyday Driving
            • Replacement

            Comments about Bosch OE Fine Wire Iridium Spark Plug:

            Purchased online through Advance Auto Parts with 20% OFF SALE. Paid for and picked up within an hour at my nearest store. Toyota manufacture say change every 100,000 miles. I like to change mine every 50,000 to keep my engine running smooth and continue getting great gas mileage.

            Comment on this reviewHelp Icon

             
            5.0

            I would buy this product again

            By 

            from Vancouver, WA

            About Me Casual Driver

            See all my reviews

            Verified Buyer

            Pros

            • Easy To Install
            • Improves Engine Efficiency
            • Increases Power

            Cons

            • none

            Best Uses

            • Everyday Driving
            • Replacement

            Comments about Bosch OE Fine Wire Iridium Spark Plug:

            All 6 plugs were pre gaped perfectly

            Comment on this reviewHelp Icon

             
            5.0

            excellent plugs

            Comments about Bosch OE Fine Wire Iridium Spark Plug:

            Used to do a tune up

            Comment on this reviewHelp Icon

            (2 of 3 customers found this review helpful)

             
            5.0

            awesome

            By 

            from Frederick, Md

            See all my reviews

            3 or more reviews submitted

            Pros

            • Last a long time
            • No gapping
            • Oem equvalent

            Cons

              Best Uses

              • Tune up

              Comments about Bosch OE Fine Wire Iridium Spark Plug:

              Bosch says they guarantee your happy or money back. Well I'm happy. The car had a sticker that said only use iridium, don't gap, well I replaced mine at 106k and it purrs like a kitten. Trust Bosch!

              Comment on this reviewHelp Icon

              Displaying reviews 1-9

              Back to top

              Check out the specials in our monthly flyer.
               
               
              Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.