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Home >> BMW >> 2004 >> X3 30i, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System - Repair (M54) >> Alternator With Drive And Mount >> 12 31... Replacing alternator belt pulley >> Special tools required:

Special tools required:

Remove and install alternator drive belt.

Depending on alternator type, grip shaft with:

Release nut with special tool 12 7 110.

Fig 1: Releasing Nut With Special Tool
G03310559Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Tightening torque 12 31 2AZ / 12 31 3AZ .