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Home >> BMW >> 2004 >> 525i Automatic >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Electrical System - Repair Instructions >> Alternator With Drive >> 12 31... Replacing alternator belt pulley
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12 31... Replacing alternator belt pulley

Remove and install alternator drive belt. See GENERATOR BELT PULLEY .

Depending on alternator type, grip shaft with:

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: Releasing Nut With Special Tool
G03260846Courtesy of BMW OF NORTH AMERICA, INC.