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12 42 500 Replacing the positive battery cable between the starter motor, alternator and positive battery connection point (N20, N26)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, 2015 BMW 328i xDrive, 2015 BMW 328d xDrive, and 2014 BMW 328i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks: 

Vehicles up to 07/2014: 

Pull off rubber mount (1) and slightly raise service cover (2) until lock of cover (3) is accessible.

Unlock lock and remove cover (3).

Fig 1: Pressing Rubber Mount
G10099969Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles up to 07/2014: 

Slacken nut (1).

Tightening torque 12 42 3AZ .

Remove positive battery cable from battery positive terminal.

Fig 2: Identifying Battery Positive Terminal Nut
G10099970Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles from 07/2014: 

Loosen positive battery cable (1).

Tightening torque 12 42 3AZ .

Release clamp (2).

Feed out positive battery cable.

Fig 3: Identifying Positive Battery Cable Clamp
G10102284Courtesy of BMW OF NORTH AMERICA, INC.

Unclip positive battery cable (1) from brackets (2) at rear of engine block.

Fig 4: Identifying Positive Battery Cable Brackets
G09914286Courtesy of BMW OF NORTH AMERICA, INC.

Remove protective cap (1) and release nut underneath.

Tightening torque: 12 42 1AZ .

Release nut (2) on starter.

Tightening torque 12 42 2AZ .

Disconnect positive battery cable (3) from alternator and starter motor. Feed out positive battery cable (3) and remove.

Fig 5: Identifying Protective Cap And Starter Nut
G09914287Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Reassemble the vehicle.
Check stored fault messages.
Clear diagnostic fault entries from fault memory.