12 42 550 Replacing battery positive lead between starter, alternator and battery positive terminal (N63)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

Open cover.

Release screw (1).

Tightening torque 12 42 3AZ .

Remove battery positive lead (2) from battery positive terminal.

Release battery positive lead (2) from retainers (3).

Fig 1: Identifying Screw, Battery Positive Lead And Retainers

Courtesy of BMW OF NORTH AMERICA, INC.

Release clamp (1).

Tightening torque 13 71 8AZ .

Release clamp (2).

Replace clamp (2).

Remove left charge-air duct (3).

Check gasket on turbocharger. Replace damaged gasket.

Fig 2: Identifying Left Charge-Air Duct And Clamps

Courtesy of BMW OF NORTH AMERICA, INC.

Detach hose (1) from clean-air pipe.

Release screw (2).

Tightening torque 13 71 1AZ .

Detach clean-air pipe (3) in direction of travel from turbocharger.

Check gasket on clean-air pipe. Replace damaged gasket.

Fig 3: Identifying Clean-Air Pipe, Hoses And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Detach cover (1) and release nut underneath.

Tightening torque 12 42 1AZ .

Installation:

Reinstall cover (1) without fail.

Risk of short circuits!

Disconnect battery positive lead (2) from alternator.

Fig 4: Identifying Battery Positive Lead And Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Release battery positive lead (1) from retainers (2).

Fig 5: Identifying Battery Positive Lead And Retainers

Courtesy of BMW OF NORTH AMERICA, INC.

Release battery positive lead (1) from retainer (2).

Fig 6: Identifying Battery Positive Lead And Retainer

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 12 42 7AZ .

Release nut (2) on starter.

Tightening torque 12 42 2AZ .

Feed out battery positive lead (3) and remove.

Fig 7: Identifying Battery Positive Lead, Nut And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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