OE Fine Wire Iridium Spark Plug
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Bosch OE Fine Wire Iridium Spark Plug

Part No. 9651 Warranty Details  
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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
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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 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

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Definitely would buy this product again well worth the money


from Henrico va

Verified Buyer

Comments about Bosch OE Fine Wire Iridium Spark Plug:

I would definitely buy this product again they work great actually made the car run the best it ever has fixed a lot of issues I was having

  • Was this a gift?:
  • No

(0 of 1 customers found this review helpful)


Go with NGK not these


from Gurnee, IL

About Me Auto Enthusiast


  • Easy To Install


  • Decreases Gas Mileage
  • No Improvement In Performance

Best Uses

    Comments about Bosch OE Fine Wire Iridium Spark Plug:

    It is horrible that these only have a 3 year warranty. I bought these and put them in my wife's 2010 Chrysler Sebring 2.4L I4 engine. After 3 days it started throwing error codes that the cylinders were not having proper burn. Her car would constantly stutter and die out. She only put 10k miles on them since they were installed. She did not drive it but down the block so fixing it was no big deal. Well I finally replaced them and the error code has gone away and error codes are gone. They were replaced by NGK, these have improved her gas mileage and the car runs very smooth.

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    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.

    2 Questions | 2 Answers
    Displaying questions 1-2
    • Q:

      What should I do if these have gone bad during the warranty period?
      Asked on 4/20/2015 by ConquerComputers from Gurnee, IL

      1 answer



        Hi Conquercomputers, I'm glad to assist you! If the item goes bad due to a defect in materials or workmanship under normal use and service after proper installation, within the warranty period stated on your original sales receipt within the warranty period, can be returned to any Advance Auto Parts store along with your original receipt and the Store Manager will be in a better position to assist you with your warranty replacement inquiry.

        Answered on 4/20/2015 by Solomon
    • Q:

      Is this plug a singel or double electrode type?
      Asked on 3/10/2012 by liteangel from Louisiana

      1 answer



        This Bosch Iridium Spark Plug with part#  9651combines a 360° continuous laser-welded iridium center electrode with a laser-welded ground electrode to provide unmatched quality and OE long life performance.

        Answered on 3/11/2012 by Vincent from AAP
    Displaying questions 1-2

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