Originally Posted by ManhattanBMW
Tomorrow my car is going into the shop to fix an undercarriage trim piece which is no longer attached properly to the car on one of its sides. What happens, when I get over 80 mph, is that the airflow underneath the car is sufficient to cause the loose side to flex and rub against the road surface, and create a noise. Maybe this is what you are experiencing.
maybe this is it,how did you find out about it,did you ear any noise at speeds over 80 mph?as i said,i hear the noise only at around 200km/h...
will BMW take care of your problem,i mean its nothing serious?