Another mystery of the reassembly I’m going through is this little blue plug that the front two doors have (maybe the rear also but I don’t see it anywhere). Newtis wasn’t much help for this case. Any ideas?


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2005 X5 E53, 167k Miles: Kenwood DNX893S Head Unit, Mud Flaps (Rear Only) , Rim Shopping(WIP), Full Spectrum RGB Halos,