The plastic flap underneath my car that leads to the location of the oil pan is falling off. When I drive, I can hear it hitting the road. The only things holding it on are the bolts (where it is normally supposed to open up) and some gorilla tape (where the hinges once were...but that's where it ripped off).

Does anyone know the part number just for that specific part and not the whole lower center under panel? I can't seem to find it anywhere.

This is the part number for the entire panel -- 51718150223 http://www.bmwpartsweb.com/BMW-Parts/Underpanel-Lower-Center-E38-95-01-750IL__51718150223-GENUINE-E38750.aspx