12 32 501 Replacing Controller Switch For Alternator (N62, N62TU)

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Necessary preliminary tasks:

Disconnect battery negative lead
Remove ALTERNATOR

Carefully insert a screwdriver between cover (1) and threaded pin.

Lever out cover (1) towards top.

Fig 1: Inserting Screwdriver Between Cover And Threaded Pin

G04740403

Courtesy of BMW OF NORTH AMERICA, INC.

Release contact screws (1).

Slacken nut (2).

Remove controller switch (3).

Fig 2: Identifying Contact Screws, Nut And Controller Switch

G04740404

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Contact Surfaces

G04740405

Courtesy of BMW OF NORTH AMERICA, INC.

Press in carbon brushes (1) of controller switch (2) in direction of arrow.

Install controller switch (2).

Fig 4: Pressing Carbon Brushes Of Controller Switch

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Courtesy of BMW OF NORTH AMERICA, INC.

Insert and tighten down contact screws (1).

Insert nut (2) and tighten down.

Fig 5: Identifying Contact Screws And Nut

G04740404

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble alternator.

Carry out alternator test with diagnostic system.