3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
The service manual that came with the car lists out all the different things you're supposed to check/do at each of the different "Inspections". My book's in my car so I can't look it up, but it does list what the service interval is for spark plugs.
imho: all this "tune-up" is not worth anything. an e46 is so new, and comes with platinums, and burns sooooo stinking clean that practically you cannot tell any wear after 50kmiles (if you maintain it). ditto coils, wires and all assorted stuff.
now, if you got hi-voltage coils, urethane bushings, wide throttle body, cold induction or such, this will make a difference, but not because of wear on oem , but because there is a quantitative perfomance difference.
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