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Old 05-31-2011, 02:53 AM   #7
GoingNuts
Just Nuts
 
Join Date: Jul 2008
Location: London
Posts: 7,253
My Ride: 2004 330Ci
Looks like something is melting. Possibly gas desolving the under car coating. It's not possible to pick that up from the road behind the sub-frame mount and not on the mount itself. See if when you wipe it off, you end up seeing bare metal.

Last edited by GoingNuts; 05-31-2011 at 02:56 AM.
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