12 42 500 Replacing the positive battery cable between the starter motor, alternator and positive battery connection point (N47 D16/20 K/U/O/T 1)

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:

Read out the fault memory of the DME control unit.
Switch off ignition.
Disconnect BATTERY EARTH LEAD .
Remove ACOUSTIC COVER
Remove front UNDERBODY PROTECTION .
Vehicles from 07/2014:
Remove TRAILING LINK .

Release screws (1).

Remove connecting link (2).

Fig 1: Identifying Connecting Link Screws

G10102269

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove holder (2).

Partially detach sound insulation on the bottom.

Fig 2: Identifying Holder Screws

G10102270

Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles up to 07/2014:

Unlock lock (1) and slightly raise service cover (2) until lock of cover (3) is accessible.

Unlock lock and remove cover (3).

Fig 3: Pressing Rubber Mount

G10099969

Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles up to 07/2014:

Slacken nut (1).

Tightening torque 12 52 4AZ .

Remove positive battery cable from battery positive terminal.

Fig 4: Identifying Battery Positive Terminal Nut

G10099970

Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles from 07/2014:

Loosen positive battery cable (1).

Tightening torque 12 52 4AZ .

Release clamp (2).

Feed out positive battery cable.

Fig 5: Identifying Positive Battery Cable Clamp

G10102284

Courtesy of BMW OF NORTH AMERICA, INC.

Release positive battery cable from retainers (1).

Fig 6: Identifying Positive Battery Cable Retainers

G10102319

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Fig 7: Identifying Positive Battery Cable Screws

G10100205

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (2).

Tightening torque 12 52 2AZ .

Disconnect positive battery cable from alternator.

Do not disconnect the connector (1).

Fig 8: Identifying Alternator Connector And Nut

G09914198

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 9: Identifying Starter Motor Nut

G10102322

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Reassemble the vehicle.
Check stored fault messages.
Clear diagnostic fault entries from fault memory.