12 32 501 Replacing regulator switch for alternator (N12, N14)

WARNING: This page is about a different car, the 2007 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Disconnect Battery Negative Lead
Remove Alternator

Release screws (1).

Remove cover (2).

Fig 1: Alternator Cover And Screws

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Release screws (1).

Remove controller switch (2).

Fig 2: Alternator Controller Switch And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Check contact surfaces (1) of slip rings for wear and recondition if necessary.

Fig 3: Alternator Slip Ring Contact Surfaces

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble alternator.

Carry out alternator test with diagnostic system.