51 21 140 Removing and installing/replacing complete lock cylinder
WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.
Operation Is Described In:
Removing and installing/replacing outside handle on left or right front door, refer to 51 21 170 REMOVING AND INSTALLING/REPLACING OUTSIDE HANDLE ON FRONT LEFT OR RIGHT DOOR (Z3 ROADSTER, M ROADSTER, Z3 COUPE, M COUPE) .