2006 E90 330i Xenon headlight flickering issue - appears to be resolved. Thought i would post this in case it helps someone else out. Specifically this is related to an issue with my Xenon's flickering in step with bumps I was hitting on the road - on smooth roads they typically worked fine. Just over a week ago I bought my first BMW (2006 330i

The most common problems found on the 2008 BMW 3 Series include a broken belt tensioner, air conditioning system issues, and problems with the fuel pump. Overall, the problems are not widespread, and aren’t as bad as on other luxury cars. One downside is that parts are expensive if something does break. A broken belt tensioner is the most

The N57 also features a piezoelectric injector which is more delicate and prone to breakage, and at the same time is very expensive and non-regenerable. Overall the engine is still good, but not like the M57 anymore. The best variant of this BMW engine is the M57D30TÜ version with 218 HP power and 500 Nm of torque.

I ran an E90 330i for 4 years and about 55k miles. It was a 55 plate with an auto box running the N52 (258bhp) - that engine was rock solid and I never had a bad experience with it. I think the later 330i's, 07 onwards, came with the N53 putting out a little more power @ 272bhp IIRC - no experience with those though My understanding is that the electric water pump can fail as the car approaches 100k, which can cost almost $1k. Also, some of the early 330i will experience excessive engine ticking, which requires head replacement. Aside from those two issues, these cars appear to be quite reliable. FsG6.

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bmw e90 330i common problems