Denso® 3478 - Iridium Long Life™ Spark Plug

17 reviews|Item # mpn4792335219
Missing Fitment Information
Fitment notes:
  • Fitment data unavailable. Compatibility is not guaranteed. Please purchase by part number only.
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$19.94
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In Stock (97)
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Vehicle Fitment

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Features

  • Manufactured to boost your engine’s performance
  • Engineered utilizing the finest materials and equipment
  • Provides reliable, hassle-free operation
  • Made in compliance with high industry standards
  • Made to perform and built to last
  • Denso Special Offers

Product Details

Iridium Long Life™ Spark Plug (3478) by Denso®. Denso's patented Iridium alloy is more durable than even Platinum, allowing the center electrode to be shrunk to only 0.7 mm in diameter. This produces a dramatic improvement in ignitability and spark plug life.

Denso® - Spark Plugs SpecificationsDenso® - CatalogsDenso Authorized DealerFeaturesWarrantyAbout us
Brand:
Denso
Part Number:
3478
UPC:
042511034785

Reviews

(17)
Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
/5
1-10 of 17 Reviews
5 of 5
Great Plugs
Great spark plugs at the fraction of the price compared to the car dealers or anywhere else for that matter. This was my first purchase from Denso, but definitely not the last.
Posted by Jake (Ontario, CA) / April 27, 20192013 Honda Civic
5 of 5
Denso 3461
What can I say other than a Denso product? Great price from MOTORCYCLEiD, great customer service. These are the spark plugs for my wife's Honda. Replacing originals after 110K miles. Thank you MOTORCYCLEiD!
Posted by Jorge (Miami, FL) / February 08, 20192010 Honda Accord
5 of 5
Excellent!
Great product, fast shipping. Thank you!
Posted by Thomas (Angier, NC) / October 27, 20182013 Nissan Altima
5 of 5
Great Product
Fits good.
Denso® 4503 - Platinum TT™ Spark Plug
Posted by Courtney (Edmonton, AB) / January 31, 20202007 Hyundai Sonata
5 of 5
Spark Plugs
Nice. Effective service.
Posted by Marco (Lindenhurst, NY) / September 11, 20191999 Nissan Sentra
3 of 5
Beware of Shipping Charges!!
The spark plugs arrived in broken box but they work as required by my vehicle. Could have purchased them locally but since I had an order in thought that they could be included for the convenience. My mistake, however, when I found that MOTORCYCLEiD charged me $297.00 for shipping, that is right $297.00 for shipping. Be cautious when buying from MOTORCYCLEiD as they have the ability to charge astronomical amounts for shipping and you are not aware until the order is placed and can not be cancelled.
Posted by William (Summerland, BC) / August 25, 20192010 Toyota Tacoma
5 of 5
Denso® - Double Platinum Spark Plug
These are quality platinum spark plug, easy to install, and the performance of the Acura TSX improves a lot. The price seem to be very reasonnable.
Posted by Thanh (Pflugerville, TX) / April 17, 20192007 Acura TSX
5 of 5
Great Service
Great service and product.
Posted by Lawrence (Beaumont, TX) / January 10, 20192007 Chevy Avalanche
3 of 5
20k Plug
Worked ok.
Posted by Charles (Bethpage, NY) / July 26, 20182008 Chevy Suburban
5 of 5
Good Plugs So Far
These plugs I installed myself in my Acura RSX 04 along with some accel super coils and so far so good, I torqued the plugs in at the 13lbs spec and made sure the gap on the plugs where at spec for my car which they were all in all a good product.
Posted by Cody (Claremont, NH) / February 23, 20182004 Acura RSX

Questions and Answers

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