11 28 020 Replacing tensioning device for alternator drive belt (N20)

Special tools required: 

• 11 0 390 .

Necessary preliminary tasks: 

• Remove DRIVE BELT .

Remove special tool 11 0 390 from the belt tensioner (1), if applicable a lock pin (2).

Loosen screws (3) on the belt tensioner.

Tightening torque 11 28 1AZ .

Fig 1: Identifying Belt Tensioner, Lock Pin, And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.