One problem related to engine belts and pulleys has been reported for the 2006 BMW 330. The most recently reported issues are listed below.
My 2006 BMW 330i began leaking oil. After inspection it was determined to be broken bolts. This vehicle has been properly cared for. It has not been in an accident and has been serviced and maintained. After online review, this problem has happened to several Bmws. The oil leaks onto brakes, belts, exhaust, etc. . . . Causing a severe safety hazard. This needs to be elevated to a recall.