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      10-04-2012, 09:35 PM   #11
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Pittsburger's Avatar
Drives: 2010 328xi, 2006 330xi
Join Date: Aug 2011
Location: Long Island, NY

Posts: 112
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Ok, after listening around the engine compartment and doing more online research. I have come to the conclusion that it is a whine from the alternator. Here's a good example:

I am calling my local dealer to see if it's covered under the maintenance plan.