86 10... Disassembly of left and right wheel boxes
WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
Remove sealing compound (1).
Drill out rivets (2).
Raise side apron (3). Pull out wheel box (4) towards rear.
Installation
Use Sikaflex 221 as sealing compound.
Fig 1: Identifying Sealing Compound, Rivets, Apron And Wheel Box