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

Special tools required: 

• 11 0 390 

See ENGINE - SPECIAL TOOLS (N54, N63) .

Necessary preliminary tasks: 

• Remove alternator drive belt  

If necessary, remove special tool 11 0 390.

Release screw (1).

Tightening torque 11 28 1AZ.11 28 V-RIBBED BELT WITH TENSION AND DEFLECTION ELEMENT

Remove belt tensioner with idler pulley (2).

Fig 1: Identifying Belt Tensioner With Idler Pulley

Courtesy of BMW OF NORTH AMERICA, INC.