31 21 180 Replacing bearing for front wheel (all-wheel drive vehicle)

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove FRONT WHEEL .

Release collar bolt (1), press brake pedal to floor for this purpose.

Tightening torque 31 60 2AZ.

Fig 1: Identifying Collar Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Renew collar bolt (1) and compression spring (2).
- Pay attention to direction of installation of compression spring!
Keep collar bolt and spur gearing of bearing/output shaft clean and free of grease.
Follow installation note of the spur gearing.

Fig 2: Identifying Collar Bolt And Compression Spring
Courtesy of BMW OF NORTH AMERICA, INC.

Remove BRAKE DISC .

NOTE:

Check brake pads and renew if necessary!

Press output shaft on swivel bearing to one side slightly and release screws (1).

Tightening torque 31 21 1AZ.

Remove bearing.

Fig 3: Identifying Swivel Bearing Mounting Screws

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Installation note:

Replace screws.
Keep contact surface (2) of wheel bearing and swivel bearing clean and free from grease.
If the wheel bearing is not replaced, all the threaded holes (1) in the wheel bearing must be reconditioned.

Fig 4: Identifying Contact Surface Of Wheel Bearing And Swivel Bearing And Threaded Holes
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IMPORTANT: Note on installation must be observed without fail!

Installation note:

Spur gearing of bearing (1) and output shaft (2) must be installed tooth in tooth!
Tighten collar bolt with compression spring by hand.

Fig 5: Identifying Spur Gearing Of Bearing And Output Shaft Installed Position
Courtesy of BMW OF NORTH AMERICA, INC.
Check whether spur gearing is locked tooth in tooth by reciprocally rotating wheel hub/output shaft.
Tighten collar bolt.
Tightening torque 31 60 2AZ.