11 28 020 Replacing tensioning device for alternator drive belt (N63)

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Special tools required:

11 0 390

Necessary preliminary work:

Remove alternator DRIVE BELT

If necessary, remove special tool 11 0 390 .

Release screw (1).

Tightening torque: 11 28 1AZ .

Remove belt tensioner with idler pulley (2).

Fig 1: Identifying Belt Tensioner With Idler Pulley And Screw

Courtesy of BMW OF NORTH AMERICA, INC.