[DriftKr6l]

Got my M spark plugs.
made in Germany and looking much better than the Russian crap.

[2020m2c]

Originally Posted by F87source

I can't imagine that the bmw oem ones and the bosch ones would be made in different places because they're literally the same plug minus the M logo. But who knows. Please keep us updated though.

But at this price I wouldn't think if you don't have life time warranty just switch to the NGK's anyways.

Agreed. I've been using NGK's for a bunch of cars lately - Mini, Porsche, Lambo, BMW — and very happy with performance.

[DriftKr6l]

Originally Posted by 2020m2c

Agreed. I've been using NGK's for a bunch of cars lately - Mini, Porsche, Lambo, BMW — and very happy with performance.

Problem is that NGK doesnt make the same heat range as stock plug, OEM is 5 vs NGK is 8 and resistance is different as well.

[agent_orange]

Originally Posted by DriftKr6l

Problem is that NGK doesnt make the same heat range as stock plug, OEM is 5 vs NGK is 8 and resistance is different as well.

Bosch 5 is equivalent to NGK 7, so only one range colder.
I'd also want to be running stock heat range on a stock tune or light tune though.
Wonder why NGK doesn't make a suitable plug in a 7 heat range?

[chris719]

Originally Posted by agent_orange

Bosch 5 is equivalent to NGK 7, so only one range colder.
I'd also want to be running stock heat range on a stock tune or light tune though.
Wonder why NGK doesn't make a suitable plug in a 7 heat range?

Not sure myself, you would assume enough N55 and S55 engines were built for NGK to be interested.

[F87source]

Originally Posted by chris719

Not sure myself, you would assume enough N55 and S55 engines were built for NGK to be interested.

Yeah, the amount of plugs for this car is not that high.


Generally you don't want to go colder without cause as that can cause misfires and rough idling due to incomplete combustion. However from what I have seen it appears it is fine to go colder on this platform without having issues. So if you want it would be ok to go with the 1 step colder NGK's.

Albeit with FCP euro you can just get the OEM plugs and pay the crazy fee once and from there on out it is free. I just hope bosch moves all production back to Germany so the quality issues on the standard non bmw part is better.

[DriftKr6l]

Exactly my thought.
Free from now on, and factory specs.

Originally Posted by F87source

Yeah, the amount of plugs for this car is not that high.


Generally you don't want to go colder without cause as that can cause misfires and rough idling due to incomplete combustion. However from what I have seen it appears it is fine to go colder on this platform without having issues. So if you want it would be ok to go with the 1 step colder NGK's.

Albeit with FCP euro you can just get the OEM plugs and pay the crazy fee once and from there on out it is free. I just hope bosch moves all production back to Germany so the quality issues on the standard non bmw part is better.