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Home >> BMW >> 2010 >> X5 30i >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Electrical System - Repair (N52) >> Alternator With Drive And Mounting >> 12 31... Replacing Alternator Belt Pulley (Version 1)
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12 31... Replacing Alternator Belt Pulley (Version 1)

Special tools required: 

Remove and install alternator drive belt.

Depending on alternator type, grip shaft with:

Release nut with special tool 12 7 110. See 12 7 110 SOCKET WRENCH SOCKET WAF 24 .

Installation: 

Tightening torque, 12 31 2AZ / 12 31 3AZ. See 12 31 ALTERNATOR WITH DRIVE AND MOUNTING PARTS

Fig 1: Identifying Special Tool (12 7 110)
G04740393Courtesy of BMW OF NORTH AMERICA, INC.