e46 stock airbox question
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08-30-2012, 06:37 PM
Join Date: Jan 2010
Location: Valparaiso, IN
My Ride: '00 328i
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Mine has a hole in the back that's spring loaded and opens if you push in on it. It's the size of a quarter. Anyone know what that is?
OP that's a drain.
Brand New Phillips bulbs and Clear ZKW Lenses
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