The sound would even come when the car is on stand still and the rpm goes up from 3k and onwards.
I will check for TSB.
Originally Posted by DEATH2000
Wow that's definitley an odd issue. It doesn't do that when idling? Have you tried getting a friend to sit in the car and push te throttle while you listen in the engine bay for it?
Since you said other people are experiencing this have you called te dealership to ask if a Technical Service Bulletin (TSB) has been issued regarding this problem. If their is a TSB about it then BMW may cover the fix, especially since your car is newer.