My 19 was the first year of a turbo for the GTR. I think they were being conservative with the 40k. I’ve been changing them at 60 and they look great. Just make sure you use the NGK (which is the Mazda brand as well).
The first one I remember is changing out the spark plugs and cables on my mom's Hyundai Accent. Car ran fine until she wrecked it or otherwise ran it into the ground.
It\u2019s very easy. My s3 has been stage 2 on e85 for the past 60k miles and I have had 0 issues. oil change, spark plugs, etc\u2026 all done by myself and it\u2019s easy.
Do follow the advice from the other replies and buy some Denso or NGK Iridium plugs for your Acura.
You can find the OE plug on the NGK site. Click on the Specifications tab to see the gap and torque value (0.8mm = 0.0315" and 18-21.6 lb. ft ) NGK plug for Arteon I bought the plugs from the dealer. I slightly re-gapped 2 of the 4 to meet spec, but expect that they would have been fine as was. My original plugs only had ~27k miles on them (but installed 7 years earlier) -- the originals came out easily and were in excellent condition.
Your observation is correct.
Bosch is the original manufacturer. Buying from them will be cheaper. Mercedes genuine just means they take the Bosch part and slap their name on it to say "yes, this component is up to our standard".
They are 2 hot for the engine , (the orange burns ) try colder plugs like heat range 8 NGK (SILZKR8E8G97080) are heat range 8 . The ones you have are 92422 are heat range 6 they are 2 hot . Same plugs fit my 2013 Veloster turbo fit your car .
Also I like the NGK sparkplugs more than Bosch.
Had some problems with Bosch plugs once.
Autolite are garbage plugs. Get denso or ngk plugs and gap them accordingly before installation. You can see signs of blow-by at the porcelain.
I wish my Toyota 4Runner spark plug service was that cheap in the Toyota dealer. I was quoted $800 parts + labor for OEM Denso.
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