That said, make sure they use quality parts. BMW/Bosch spark plugs and OEM pulleys (and belt) are a must. NGK plugs are cheaper and don\u2019t last as long. Same goes for off-brand belts and pulleys.
Went with Bosh double platinum plugs at 60,000km when I notice a stumble at idle and that's the interval for change. I instantly went from best of 9.6L/100km to 7.8L/100km big difference in performance and smoothness and i prefer a German plug in a German car with Bosch electronics.
I'd stick with the WR6DPO Bosch. Not sure why but they just work with no questions.
ive been using the RS7 spark plugs(Gapped properly) and swap every 10k miles, but nowadays I do not run very hard, just cruise and occasional hard accelerations. Paired with APR coil packs, havent had any issues.
Bosch Plugs are tops in any application you use them for... All of their parts are worth what you pay for them...I've...\"NEVER\" had a Bosch part of any kind to fail at its applied usage...! True top of the line German Engineering... period...!!!!!!
I have used NKG FOR THE PAST 6 years on the car , no issues at all. Recently replaced them with Bosch OEM spark plugs , it’s same shit , no difference.
Bought mine from rock auto; got the Bosch ones since the NGK’s are really only recommended if your car is tuned
definitely avoid Bosch spark plugs. I'm not personally a fan and I've seen plenty fail. Unless they were original in the motor (usually Subarus don't use Bosch), I'd stick with NGK or Denso in my opinion.
Bosch spark plugs are also trash.
Those spark plugs are junk, and on top of that, they are now carbon fouled. I would strongly encourage you to install new, normal, spark plugs.
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