I've had perfectly fine luck with aftermarket coils, 4 years 2 cars no faults. I'm running factory RS7 plugs, I forget if they were NGK or Denso, but they are 1 heat range colder. Working fine with stage 2.
Pros: working fine with stage 2
Reviews of NGK parts For Business
Average Rating
?
The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
3.8
Manufacturer Ranking
#103
790
Spare Parts
2
Country
Japan
Website
ngk.de
Spare Parts
Comparisons
NGK. Coils aren’t something worth saving a couple bucks over picking a worse part
Pros: good quality
Ngk has been much better in my experience
Pros: much better
I've had success with NGK coils via Rock Auto on multiple vehicles.
Pros: had success
I like NGK’s. No longer have my E28 but in my 944 i still run NGK’s.
Pros: reliable, good performance
Vehicle:
Porsche
I suggest buying a known high quality replacement, not being picky about the exact spec, and seeing if that makes a difference. At under $5 it's a minimal cost and effort. Based on the what this engine was likely copied from, I would pick a NGK BPR4ES or BPR5ES from a vendor that doesn't have a reputation for NGK counterfeits.
Pros: high quality replacement
Cons: counterfeit risk
I removed the Champion plug and replaced it with an NGK and on the first pull it ran.
Pros: ran on first pull
Cons: did not start
I recently put in NGK LKAR7BIX-11S (93501) and some cheap amazon coils. A coil failed and I just replaced it all to be sure.
Put in NGK ILKAR7B11 (4912) around 186k miles. I've burned so much oil and did a piston soak at 205k~. I scrubbed the tips with a wire brush but it didn't do much. Lots of carbon. I really don't notice a difference.
Cons: lots of carbon, no difference
Mileage: 33372 km
Part number: 93501
Never had good runs with ngk
Cons: poor performance
Yep. Ordered some NGK iridium plugs on Amazon, 2600 miles later the car was misfiring. The gap was toast. Counterfeit for sure.
Cons: misfiring, gap toast
Mileage: 2600 km
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