31 21 088 Removing and installing left or right swivel bearing (AWD Vehicle)

Necessary preliminary tasks:

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

Tightening torque 31 60 2AZ .

Fig 1: Identifying Collar Bolt

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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.

IMPORTANT: See installation note on spur gear at the end of the information.

Fig 2: Identifying Collar Bolt And Compression Spring

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IMPORTANT: Secure swivel bearing against falling out.

Remove BRAKE DISC .
Expose brake hose and cable on swivel bearing.
REMOVE pulse sensor from swivel bearing.
REMOVE lower wishbone from swivel bearing.
REMOVE trailing link from swivel bearing
REMOVE track rod end from swivel bearing.

Fig 3: Securing Swivel Bearing Against Falling Out
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To remove, see 31 12 002 REMOVING AND INSTALLING/REPLACING TOP LEFT WISHBONE or 31 12 003 REMOVING AND INSTALLING/REPLACING TOP RIGHT WISHBONE upper wishbone from swivel bearing.

Remove swivel bearing.

IMPORTANT: Note on installation for spur gearing must be observed without fail!

Installation note:

Spur gearing of bearing (1) and output shaft (2) must be installed form-fit (tooth in tooth)!
Tighten collar bolt and compression spring by hand.
Check whether spur gearing is locked tooth in tooth by reciprocally rotating wheel hub/output shaft.
Once a form-fit has been ensured, tighten to final torque.
Tightening torque 31 60 2AZ .

Fig 4: Installing Spur Gearing Of Bearing And Output Shaft
Courtesy of BMW OF NORTH AMERICA, INC.