Count me in the Whistling club... 328i Sport 11/12 build.
Over 45 mph a definite whistling, seems a bit louder when in passenger seat. Hard to localize...
I have an appt at the dealer this thurs. I will be asking them to focus on the drip moulding as mentoned earlier in this thread.
My 1st BMW, ugh. Pretty embarrasing when you drive someone in your new car and they say - is the sunroof open? Where is the whistling coming from?
(PS - thx to all who have posted, it keeps my confidence up that it will get fixed)