E90/E91/E92/E93 (2006 - 2013)
For the record, I have a 2011 E93 328i with 143k miles.
I’ve been plagued with jumping, rough idle, and misfire codes for a while now. The shops all say the same thing: replace coils and spark plugs should solve the problem. After performing this maintenance with OEM parts, I was still plagued...