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NGK Laser Iridium Spark Plug (12-18 3.6L Jeep Wrangler JK)

Item J103333
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$13.49 (each)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • High performance replacement spark plug
      • Improves fuel economy
      • Iridium disk for stable spark
      • Ensures fast startup and lower emissions
      • Sold individually
      • For 2011-2018 3.6L Jeep Wrangler JK models


      High Performance. Maintain your Jeep and ensure reliable sparking power by replacing your old, worn out spark plugs with NGK's Laser Iridium Spark Plug. This high performance replacement spark plug provides improved fuel efficiency, lower emissions, and a faster start up for reliable and consistent performance.

      Superior Materials. The NGK Laser Iridium Performance Spark Plug feature Iridium and Platinum disks welded to the electrodes to reduce the wear rate of both surfaces ensuring greater durability and increased life performance. NGK uses pinpoint precision laser welds to reduce excess debris decreasing the required voltage to bridge the spark gap for a more efficient burn.

      Application. This NGK Laser Iridium Spark Plug is designed for use in 2011-2018 3.6L Jeep Wrangler JK models.

      Fitment: 2012 2013 2014 2015 2016 2017 2018 Details

      MPN# ILKR7B8

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (8)

      Write a Review

      Ratings Summary

      4.5 out of 5 overall rating from 8 customers

      Installation Time: Afternoon

      • April 10, 2019

        5 2017 Wrangler - RyBang Installation Time: Afternoon

        Simple Improvement

        Great and simple change out. May take a little time if you’re planning to do yourself on the 3.6L. You have to take the whole throttle body off to get to the other three plugs. Better response, better pick up, and slight fuel economy improvement, like 0.4 mpg better. Take fuel gains where you can on Jeeps.

        Helpful (3)
      • June 14, 2018

        5 2017 Wrangler - ClaudioM Installation Time: Less than 1 Hour

        Spark plugs

        Everything that i wanted it to do, works great, no worries, I love it

        Helpful (12)
      • May 30, 2018

        1 2014 Wrangler - JimH Installation Time: Afternoon

        Not correct plug for 3.6L!!

        These plugs caused P0300 code within 25 miles of driving. I went to NGK's website and these plugs are not even listed as the correct ones for a pentastar motor. They are gapped to .031" (0.8mm) when the correct gap for a 3.6L is .044" (1.1mm). These plugs are apparently meant for Kia Soul, Mitsubishi outlander, and Smart cars. Very frustrated that I will have to pull them back out and replace them, especially since it is not a simple 20 minute job.

        Helpful (27)
      • May 04, 2018

        5 2014 Wrangler - Alex Installation Time: Afternoon

        Way better

        I change the original champion to these. N I could say it’s a difference feels a lot better engine wise!!! A little better response when getting on fw and M waiting for my afe pipes should make a big difference

        Helpful (14)
      • April 20, 2018

        5 2016 Wrangler - RAD Installation Time: Less than 1 Hour

        The right plug

        Don't waste your time and money. NGK plugs last longer between tune-ups and perform better than other the cheaper( least coasting) brands.

        Helpful (13)
      • December 24, 2017

        5 2012 Wrangler - JustMe Installation Time: Afternoon

        Way Better than Stock

        After installing these at 80,000 miles engine has sharper response and since I have owned this jeep since it was new I always had pinging under almost any load. I checked for vacuum leaks, there were none and my manifold vacuum was 15-16psi. With these plugs my vacuum reading went to a very steady 18 psi. I used the Actron vacuum gauge and tested near throtle body and then at mainfold plenum. Great buy and well worth the effort of having to take of the plenum off. FYI: replace all six intake gaskets, I replaced my oil filter housing, checking all the fasteners I could that I couldn't reach with the plenum on.

        Helpful (13)
      • March 14, 2017

        5 2016 Rubicon - TxRubicon Installation Time: Afternoon

        Better than the stock Champion plugs

        Installed in my 2016 Jeep Wrangler and they cured my spark knock issue that the factory blamed on my aftermarket exhaust. The gaps were all good to go right out of the box. I will definitely buy these again when the time comes.

        Helpful (15)
      • May 05, 2016

        5 2014 Wrangler Unlimited - Jeeper Installation Time: Less than 1 Hour

        Good replacement, no noticeable gain nor loss

        I bought these as a replacement for my brothers 2014 JKU, and had no issues with them. I dont feel they are really any better per se, but they arent that much different in price than the factory plugs and NGK always makes solid products. Why not just go with the better option in my opinion

        Helpful (15)

      Questions & Answers (1 answers)

      1 Top Rated Question

      These spark plugs come from the NGK factory with a .031" (0.8mm) GAP set. The Jeep OE Champion spark plugs have a gap set to .043" (1.1mm). Do you your customers usin these spark plugs set the gap to .043" or run them at the stock NGK .031" gap setting?

      • The NGK Laser Iridium Spark Plug do not come pre gaped and would have to be gaped to your vehicles recommended size.

      Helpful (6)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Spark plug

      Will It Fit My Wrangler

      • JK Rubicon 2 Door - 12, 13, 14, 15, 16, 17, 18
      • JK Rubicon 4 Door - 12, 13, 14, 15, 16, 17, 18
      • JK Wrangler 2 Door - 12, 13, 14, 15, 16, 17, 18
      • JK Wrangler 4 Door - 12, 13, 14, 15, 16, 17, 18