: Do a search on 'whistling' or 'clear bra whistle' (although it's NOT cause by clear bra) in the forums. There are several posts about this whistling wind noise.
The mirror cap has a design flaw that causes the whistling. My 135i is actually at BMW Service now for this issue.
Quote:
Originally Posted by JC Jai
I'm not sure if my issue is the same but yea lately I've notice some whistling from the driver side window when the windows are closed, at speeds upwards of 80 KM/h. Getting pretty annoying.
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