12 31 ... Replacing alternator belt pulley: Removal

Depending on alternator type, grip shaft with:

• hexagon socket
• multi-tooth socket or
• Torx socket wrench

Release nut with special tool 12 7 110.

Installation: 

Tightening torque, see 12 31 2AZ / 12 31 3AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Fig 1: Removing And Install Alternator Drive Belt

Courtesy of BMW OF NORTH AMERICA, INC.