12 42 500 Replacing positive battery cable between starter motor, alternator and positive battery connection point (N47 D20 O1)

Necessary preliminary work:

Fold back cover (1).

Release nut underneath.

Tightening torque 12 52 4AZ .

Remove positive battery cable from battery positive terminal.

Fig 1: Identifying Back Cover Of Positive Battery Cable

Courtesy of BMW OF NORTH AMERICA, INC.

Release positive battery lead(1) from acoustic cover (3).

Fig 2: Identifying Positive Battery Cable, Expanding Rivets And Rear Acoustic Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

Tightening torque 12 52 2AZ .

Disconnect positive battery cable from alternator.

Release positive battery lead from retainer (2).

Fig 3: Identifying Positive Battery Lead From Retainer And Slacken Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Release retainers (1) and detach positive battery lead from guide.

Fig 4: Identifying Retainers Of Positive Battery Lead

Courtesy of BMW OF NORTH AMERICA, INC.

Release nut (1) on starter motor.

Tightening torque 12 52 3AZ .

Disconnect positive battery cable from starter motor.

Release positive battery cable from retainers (2).

Feed out positive battery cable and remove.

Fig 5: Identifying Positive Battery Cable From Retainers And Nut

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Reassemble the vehicle.
Check stored fault messages.
Delete fault memory.