Replacing tensioning device for alternator drive belt (B48 and B46 engine) (Cooper S and John Cooper Works)

Preliminary work needed: 

• Remove DRIVE BELT .

Removal: 

Release screws (1) from belt tensioner (2).

Remove belt tensioner (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Install belt tensioner (2).

Tighten down screws (1).

Tightening torque: 11 28 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work: 

• Install DRIVE BELT .