So I’m running an 03’ with the 2.4 and I put in NGK Laser Iridium but Denso is perfectly fine. I’m surprised how much your plugs cost if your paying list price. The cost price is how much I paid for mine at the parts store. Both plugs are fine to use.
Hondas are notoriously picky about the plugs being Denso.
They are very picky with their spark plugs so you are limited to NGK which is oem.
Yes, a bad spark plug, incorrect type of spark plug, or a wide spark plug gap can cause a coil to fail. If electrical resistance in the secondary ignition circuit is too high the coil must generate a higher voltage to fire the plug.
I remember the first time I did anything besides oil, it was spark plugs and power steering fluid on my old accord. Starting it up after had me nervous, second guessing everything I did.
The only things it’s done to me is die (dead battery) and a misfire that cause it to go into limp mode at 118k miles (I went cheap on spark plugs instead of doing NGK’s)
If you used auto lite spark plugs that is almost certain the problem.
I tried one of the economy plugs on my 02 Accord. Ended up having to chuck it and buy a Denso.
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This part for Honda Accord is made around the world. We have reviews for spark plug manufacturers from countries such as: Japan, USA .
In March 2026, the ranking of spark plug for Honda Accord on PartReview included 4 manufacturers. It is based on 8 reviews and 24 votes.
Last month, PartReview users preferred OEM Honda. 25% of positive votes went to this manufacturer.
In second place: spark plug NGK — 12%.
Third place: Denso with 0% of the votes.
In the overall ranking of spark plug, which aggregates opinions of owners of different car makes and models, these brands hold the following positions:
After seeing which spark plug owners of Honda Accord prefer, check other popular parts for this car. In March 2026, leaders on PartReview were:
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