Thread: fluttering sound
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      09-15-2010, 03:18 PM   #2
Ctm309
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Drives: '09 M3 AW Carbon roof DCT '11
Join Date: Oct 2009
Location: Norwalk, Ct./Port Washington, N.Y.

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Air Filter? There is a noise like you say sometimes from the air filter rattling in the air box. Not uncommon. Then it could also be many things.
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