12 31 020 Removing and installing or replacing alternator (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:

Switch off ignition
Disconnect BATTERY EARTH LEAD and cover.
Remove INTAKE SILENCER HOUSING .
Remove CLEAN AIR PIPE , top.
Remove TENSIONING DEVICE for drive belt.

Release screws (1).

Tightening torque 12 31 1AZ .

Fig 1: Identifying Alternator Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) and remove.

Release nut (2) and remove the positive battery cable.

Tightening torque 12 42 1AZ .

Disconnect tank ventilation line (3) and place to one side.

Feed out alternator (4) to the left and remove.

Fig 2: Identifying Tank Ventilation Line, Alternator, Connector, Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.