Version 2

WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, 2001 BMW 525i, and 2000 BMW 528i. However, it is still accessible from the selected car via links, so may be relevant.

Unlock and detach plug connection (1).

Release nut (2) and disconnect battery positive lead.

Tightening torque. Refer to ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUE .

Fig 1: Disconnecting Battery Positive Lead (Version 2)

Courtesy of BMW OF NORTH AMERICA, INC.

Version without idler pulley:

Release alternator screws in succession while simultaneously gripping alternator firmly.

Remove alternator.

Fig 2: Loosening Alternator Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Version with idler pulley:

Remove cover from idler pulley (1).

Release screw and remove idler pulley (1).

Release screw and remove alternator (2).

Fig 3: Removing Alternator

Courtesy of BMW OF NORTH AMERICA, INC.

Version with idler pulley:

Installation:

Turning lock of tensioning roller must engage in alternator groove.

Fig 4: Identifying Tensioning Roller Lock Position

Courtesy of BMW OF NORTH AMERICA, INC.

Interrogate fault memory of DME control unit.

Now clear the fault memory.