12 32 501 Replacing controller switch for alternator (N62)

WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Notes on disconnecting and connecting battery. See Instructions for disconnecting and connecting battery .
Disconnect battery negative lead.
Remove alternator. See GENERATOR 4.4L (N62) .

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

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Courtesy of BMW OF NORTH AMERICA, INC.

Release contact screws (1).

Unscrew nut (2).

Remove controller switch (3).

Fig 2: Removing Controller Switch

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Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Checking Contact Surfaces Of Slip Rings

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

Install controller switch (2).

Fig 4: Installing 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: Tightening Down Contact Screws

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Courtesy of BMW OF NORTH AMERICA, INC.

Assemble alternator.

Assemble engine.

Carry out alternator test with diagnostic system.