My wife owned an '06 330i for 5 years.
Every little thing on it kept failing - a door handle here, a control knob there - and the dashboard plastic cracked within 3 years.
It was our experience that thing was a total money pit.
and yeah, eventually the engine mounts (saddles) began to give.
Problem with Beemers is that the engines are big enough to hurt themselves, even with conservative driving, due to the supporting structure being fairly cheap.
They're dreamy cars for 3-4 years, after that, time to replace.