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Old 08-09-2011, 03:52 PM
dtc100 dtc100 is offline
Officially Welcomed to the 'Fest
Location: Norcal
Join Date: Jan 2011
Posts: 4,694
Mein Auto: 2011 328i
We have this issue on the 3 series. The whistle mostly comes from the driver side mirror. Not so noticeable when the window is closed.

Hopefully it is not the same place because BMW should have this resolved by now. It has to do with the two-piece mirror casing construction.
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