51 47 131 Removing and installing/replacing luggage compartment floor trim (Z3 coupe, M coupe)
WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.
Open trunk lid.
Fold corners (1) at grips inward and take out rear floor mat (2).
Unscrew bolts (1).
Thread front floor mat (2) toward rear out of guide and remove.