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      01-17-2013, 06:06 PM   #1
rjg
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Drives: 2011 328i Coupe
Join Date: Nov 2012
Location: Florida

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Odd smell from vents with AC off

When I turn the fan on with the AC off, the air coming through the vents has an unpleasant smell. It doesn't strike me as a chemical odor, nor does it smell like burnt oil (I know that valve cover leaks can sometimes cause a burning oil smell in the cabin, but that's not what this smells like).

To be frank, the odor calls to mind a neglected public restroom where people have been pissing on the floor. Switching between fresh air, recirculate, and auto-recirculate doesn't seem to have any affect on the smell. However, if I turn the AC on, the smell stops completely.

The dealer changed the cabin filter just a few weeks ago, but the smell is still there.

Any ideas?
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2011 328i Coupe | Alpine White | Oyster/Black Dakota Leather | M Sport Package | Premium Package | iDrive | Harman Kardon Surround | Steptronic