51 26 000 Replacing switches (central locking drive) for door locking on left or right sides
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 lock on left or right front door, refer to 51 21 090 REMOVING AND INSTALLING/REPLACING DOOR LOCK ON FRONT LEFT OR RIGHT DOOR (Z3 ROADSTER, M ROADSTER, Z3 COUPE, M COUPE) .