11 28 020 Replacing tensioning device for drive belt for alternator (N55)

Special tools required: 

• 11 0 390 .

Necessary preliminary tasks: 

• Remove DRIVE BELT .

Remove special tool 11 0 390 .

Release screw (1) on belt tensioner.

Tightening torque 11 28 1AZ .

Fig 1: Identifying Belt Tensioner Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.