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.
If you're talking about the "Service Engine Soon" light, yeah that could accompany a change in the sound of your engine. Find someone who will read the fault-codes for free from the diagnostic port under your hood, then post what the faults were.
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