11 28 020 Removing and installing/replacing belt tensioner for the alternator (N47 D20 O1)

Special tools required: 

• 11 3 340

Necessary preliminary tasks: 

• Remove ALTERNATOR DRIVE BELT .

Release screws (1).

Remove belt tensioner (2) with roller and deflecting element.

Fig 1: Identifying Special Tool (11 3 340)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

If a tensioning device is no longer needed, the special tool 11 3 340 must be removed using a vice.