12 31... Replacing alternator belt pulley

WARNING: This page is about a different car, the 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

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 .

Installation:

TIGHTENING TORQUE, 12 31 2AZ/12 31 3AZ .

Fig 1: Removing Nut Using Special Tool (12 7 110)

Courtesy of BMW OF NORTH AMERICA, INC.