12 31... Replacing alternator belt pulley

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.

Special tools required:

12 7 110

Remove and install alternator drive belt.

Depending on alternator type, grip shaft with:

hexagon socket
multi-tooth socket or
Torx socket wrench

Release nut with special tool 12 7 110.

Fig 1: Releasing Nut With Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Installation :

Tightening torque 12 31 2AZ /12 31 3AZ. Refer to 12 31 ALTERNATOR WITH DRIVE AND MOUNTING PARTS .