Special Tools Required

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

12 7 120

Remove and install alternator drive belt.

Grip alternator shaft with:

internal serration

Release nut with special tools 12 7 120 .

Installation:

Tightening torque , see 12 31 3AZ in ALTERNATOR WITH DRIVE AND MOUNT .

Fig 1: Identifying Special Tool (12 7 121 & 12 7 122)

Courtesy of BMW OF NORTH AMERICA, INC.