31 21 180 Replacing bearing (wheel bearing) for front wheel

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2014 BMW X6, 2013 BMW X6, 2012 BMW X6, 2011 BMW X6, and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Bearing cannot be dismantled.
Do not wash out bearing.

Remove FRONT WHEELS .

IMPORTANT: Expand turning lock sufficiently to avoid damaging thread when releasing collar nut.

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

Fig 1: Identifying Collar Nut

G04794331

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace collar nut, oil collar nut/wheel bearing contact surface only and tighten down.

No oil permitted on thread of shaft journal or collar nut.

Tightening torque 31 21 2AZ .

Secure collar nut by positive peening on flat areas of output shaft.

Remove BRAKE DISK .

Release screw (1) and pull pulse generator out of bore.

Installation:

Clean bore for pulse generator and lubricate with Staburags NBU 12/K grease.

Tightening torque 34 51 3AZ .

Release screws (2) and remove holder from swivel bearing.

Fig 2: Identifying Generator Screw

G04794332

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Output shaft has been removed only for the purpose of creating the picture.

Release bolts (1) and remove wheel bearing.

Installation:

Replace screws.

Tightening torque 31 21 1AZ

Fig 3: Identifying Wheel Bearing Screws

G04794333

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not damage inner race (1) of wheel bearing.

Detach wheel bearing from output shaft (refer to PRESSING OUTPUT SHAFT OUT OF DRIVE FLANGE ).

Installation:

Keep contact surface of swivel bearing and wheel bearing clean and free from oil and grease.

Fig 4: Identifying Inner Race

G04794334

Courtesy of BMW OF NORTH AMERICA, INC.