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

Bosch OE Fine Wire Iridium Spark Plug

Part No. 9604 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


by PowerReviews
BoschOE Fine Wire Iridium Spark Plug

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 3 customers

Displaying reviews 1-3

Back to top


Great plug


from Fort Myers, FL

About Me Auto Enthusiast

Verified Buyer


  • Increases Power


    Best Uses

    • Everyday Driving

    Comments about Bosch OE Fine Wire Iridium Spark Plug:

    Great price for a great plug. Improved performance and mileage a little.

    (1 of 1 customers found this review helpful)


    Bosch- Goog plug-1/2 priced


    from Mt Airy MD

    About Me Auto Enthusiast, Casual Driver, Truck Enthusiast


    • Easy To Install
    • Improves Engine Efficiency
    • Increases Power


      Best Uses

      • Everyday Driving
      • Replacement

      Comments about Bosch OE Fine Wire Iridium Spark Plug:

      Installed these plugs in a 2006 Honda Pilot LX. The SUV had original NGK plugs in it and they had 140,000 miles on them. I finally started to notice sluggishness and fuel mileage drop off. So that being said, NGK's are great plugs. However, the Bosch are 1/2 the price and really improved perfomance. If they last 1/2 as long as the NGK's, well worth it! If you plan on driving another 100K miles or so, then maybe go NGK.

      (3 of 3 customers found this review helpful)


      Worked great - half the price of OEM NGK


      from Nashville, TN

      Verified Buyer
      Helpful Reviewer

      Comments about Bosch OE Fine Wire Iridium Spark Plug:

      These are a direct replacement for the NGK laser iridium plugs that Honda put in my 2005 Odyssey. The OEM plugs went for 110,000 miles with no issues and I expect these Bosch plugs will do the same. They check all the same boxes as the twice-as-expensive NGKs - iridium-tipped, laser-welded, anti-sieze plating on threads, etc. With Bosch you get all the latest technology but at nearly half the price of the NGKs. Amazing quality, easy replacement, good price - it was a no-brainer. Excellent product.

      Displaying reviews 1-3

      Back to top

      Do you have questions about this product?


      Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

      1 Question | 1 Answer
      Displaying question 1
      • Q:

        Is this spark plug just as good as the OEM NGK plugs
        Asked on 11/28/2012 by Marlon from Garfield Hts, Ohio

        1 answer



          Bosch original equipment iridium spark plugs combine a 360 degree continuous laser-welded iridium center electrode with a laser-welded ground electrode to provide unmatched quality and original equipment long-life performance. They feature a 0.6mm ultra-fine wire iridium center electrode to provide exceptional ignitability. The laser-welded electrodes offer more area for flame growth and increased durability. The plugs have a nickel plated housing for superior resistance to corrosion and come factory set pre-gap for an easy installation. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

          Answered on 11/28/2012 by Steve from AAP
      Displaying question 1

      Do you have a question about this product? 

      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.