BMW X3 (F25) Service & Repair Manual: Wheel bearings

• Detaching wheel bearing inner ring from drive flange (drive flange removed)
• Replacing drive flange on left/right rear axle shaft
• Replacing left or right wheel bearing on rear axle shaft

Detaching wheel bearing inner ring from drive flange (drive flange removed)

Special tools required:

• 33 4 401
• 33 4 403
• 33 4 404
• 33 4 408
• 33 4 409
• 33 4 407
• 2 230 163
• 33 4 402
• 33 4 400

IMPORTANT: Special tool 33 4 409 must not be removed!

Insert special tool 33 4 407 into special tool 33 4 401 .

Fit special tool 2 230 163 and tension until it lies firmly against wheel bearing inner ring.

Fit special tool 33 4 401 in conjunction with 33 4 407 .

Unscrew spindle 33 4 402 as far as is possible.

Tighten special tool 33 4 400 until it lies against special tool 2 230 163 .

• Hydraulic unit - 81 64 2 155 744
• Adapter kit 1 - 81 64 2 155 745
• Adapter kit 2 - 81 64 2 155 746

• Pressure cylinder of hydraulic unit (1) must be in the initial position.
• Spindle F3 must terminate flush with hydraulic unit (1).
• Assemble special tool as shown in graphic
• Turn spindle of special tool 33 4 400 up to limit position.

The following tools are required for detachment, consult graphic for arrangement:

Vehicle components:

Required components for all models and types:

Components specific to model and type:

Detach wheel bearing inner ring from drive flange.

Replacing drive flange on left/right rear axle shaft

Special tools required:

• 34 4 000

Necessary preliminary tasks:

• Remove REAR WHEEL .

If necessary, remove visual protection cap (1).

IMPORTANT: Expand anti-twist lock sufficiently to avoid damaging thread when releasing collar nut.

Activate parking brake and release collar nut.

Installation note:

Lightly oil the gearing at the shaft journal.

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

Replace the collar nut and secure it by positive peening on flat areas of output shaft.

• Remove BRAKE DISC .

only: F01, F02, F04, F07:

Twist roll pins (1) 90º with special tool 34 4 000 and detach.

Only disconnect return spring (2) with brake spring pliers.

Remove brake pads (3).

NOTE: the fitted position of the adjusting screw must not be changed or turned.

Use the special tool from the BMW workshop catalogue.

• Hydraulic unit - 81 64 2 155 744
• Adapter kit 1 - 81 64 2 155 745
• Adapter kit 2 - 81 64 2 155 746

The following work steps describe detachment of the drive flange:

The following tools are required to pull the drive flange out of the wheel bearing.

Vehicle components:

Required components for all models and types:

Components specific to model and type:

• Pull out drive flange using the hydraulic tool.

IMPORTANT: Wheel bearing will be destroyed by being pulled out of the drive flange and must be renewed!

The following work steps pulling in the drive flange:

The following tools are required to pull the drive flange in. For arrangement, see Fig. 107:

Installation note:

The drive flange and output shaft can be installed in the wheel bearing in one operation.

Vehicle components:

Required components for all models and types:

Components specific to model and type:

IMPORTANT: Risk of damage! Due to the technical requirements, the special tool used, sleeve G,* is relatively thin-walled. So that the load limits of the clamping sleeve are not exceeded, you must use the adapter 81 64 2 318 661 together with a torque wrench.

Fit adapter with torque wrench to hydraulic unit.

Set torque wrench to 20 Nm.

Oil drive flange lightly and attach to the output shaft gearing.

Pull in drive flange with hydraulic tool until torque wrench triggers.

Installing parking brake shoes. (Only for F01, F02, F04, F07) Install BRAKE DISC .

Activate parking brake and tighten collar nut.

Installation note:

Replace collar nut.

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

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

After installation:

Only for F01, F02, F04, F07:

• Adjust parking brake.

Replacing left or right wheel bearing on rear axle shaft

Necessary preliminary work:

• Remove DRIVE FLANGE FOR OUTPUT SHAFT.

Release screws (1).

Remove wheel bearing.

Installation note:

Replace screws.

Installation note: Keep contact surface (2) of wheel bearing/wheel carrier clean and free from oil and grease.