11 28 010 Replacing Alternator Drive Belt (N54)

Special tools required: 

• 11 3 340

Necessary preliminary tasks: 

• Remove fan cowl.

Unfasten hose clip (1).

Release quick-connect fastener (3) 90° on boost pressure pipe in direction of arrow.

Pull off air hose (2).

Installation: 

Bring lock (3) back 90° into installation position.

Recirculated air hose must audibly snap into place.

Fig 1: Identifying Air Hose Installation Position

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip line (1) from holder (2) in direction of arrow.

Fig 2: Identifying Air Hose Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Release coolant hose (1) from holder (2).

Fig 3: Identifying Coolant Hose & Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Fold air duct (2) down.

Fig 4: Identifying Air Duct With Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Turn belt tensioner (1) in direction of arrow until bore is flush on housing.

Secure belt tensioner in place with special tool 11 3 340. See 11 3 340 LOCKING PIN (2)

Fig 5: Identifying Belt Tensioner With Special Tool (11 3 340)

Courtesy of BMW OF NORTH AMERICA, INC.

Remove drive belt (1).

Installation: 

Mark the direction of rotation of the drive belt if it is to be reused.

Fig 6: Identifying Drive Belt

Courtesy of BMW OF NORTH AMERICA, INC.

Pretension tensioning pulley (1) in direction of arrow.

Remove special tool 11 3 340. See 11 3 340 LOCKING PIN (2)

Fig 7: Identifying Tensioning Pulley

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Note arrangement of drive belt

Fig 8: Identifying Drive Belt Installation Position

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Installation: 

Check that drive belt for is in correct installation position - risk of damage.