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Home >> BMW >> 2012 >> 335is 2D Convertible, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1793 (Engine Electrical System - Repair) >> Alternator With Drive And Mounting >> 12 31... Replacing alternator belt pulley (with overrunning clutch)

12 31... Replacing alternator belt pulley (with overrunning clutch)

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Special tools required: 

Remove and install alternator drive belt.

Grip alternator shaft with:

Release nut with special tools 12 7 120.

Installation: 

Tightening torque 12 31 3AZ .

Fig 1: Releasing Nut Using Special Tool (12 7 120)
G05476051Courtesy of BMW OF NORTH AMERICA, INC.