Originally Posted by sdbill

My apologies to anyone who relied on my advice regarding the quality of NGK-branded coils. Bought a set from Rock Auto in Feb, 2019. They came in NGK- printed boxes and had the NGK logo and part number stamped on them, so thought they were decent. One failed a month ago, just prior to the expiration of the three-year warranty and was promptly replaced by Rock Auto. A second one failed last night, fortunately, not far from my garage, and I limped home under "Restricted Performance". I replaced it with one of the original Densos I kept as spares. Now, I am thinking I will just leave it in the car, as probably no more trouble than trying to navigate the replacement coils market at this stage. Just travel with a replacement spare and a small metric socket set. Anyone have a new/better choice for coils? Good experience with the new Denso 673-9331 or later model ones?

Originally Posted by jagmantom

Greetings, My 03" XK8 is just about to hit 100K miles and I want to give her some TLC. The service book say to change the plugs at 100K miles but it doesn't say anything about the coils. As long as I'm in there does it makes sense to change them? Also, there is such a wide range in prices in the aftermarket ones and the OEM ones are stupid expensive. So, the question is do they need changing and am I better with 100K OEM coils or new aftermarket coils? I see new no name aftermarket set going for anywhere between $99 a set on Amazon, to $165 a set on eBay, to $300 plus for NGK on eBay. Any recommendations from experience would be greatly appreciated.

Originally Posted by zray

Any tips on identifying the counterfeit NGK coils ?

Z

Originally Posted by xalty

NGK coils are not quality parts in the first place

Originally Posted by zray

are the Denso’s even still available ?


Z