Completely remove and install the rear axle support (AWD) (X2 xDrive 28i 2018-2023, X2 M35i 2019-2022)
Special tools required:
- 31 5 251
- 00 2 030
- 31 5 255
- 31 5 253
Failure to comply with the following instructions may result in the vehicle slipping off the lifting platform and critically injuring other persons.
Load the luggage compartment with a minimum of 100 kg before lowering/removing the rear axle support. This prevents the vehicle from tilting or sliding off the vehicle hoist!
When supporting components, make sure that:
- the vehicle can no longer be raised or lowered.
- the vehicle does not lift off the locating plates on the vehicle hoist.
Observe SAFETY INFORMATIONS for raising the vehicle
In order to avoid damage to vehicle hoist, perform weight compensation on vehicle.
Necessary preliminary work:
- Refer to REMOVING REAR WHEELS .
- Refer to REMOVING THE LEFT AND RIGHT TRAILING ARM COVERS .
- Refer to REMOVING REAR AXLE FINAL DRIVE .
- Refer to REMOVING TANK COVER ON LEFT AND RIGHT .
- Refer to REMOVING BOTH THE REAR COIL SPRINGS .
Removal:
Press brake pedal down to floor and secure with pedal support.
This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.
Unlock and disconnect the connector (1).
Release cable (3) from cable clip (2).
Only for rear ride height sensor:
Disconnect connector (1).
Release hollow nut (2).
Disconnect brake hose (1) on left and right from the brake line.
Disconnect left and right plug connections (1) of the pulse sensor.
- To do so, partly release the wheel arch panels.
Disengage cable from holders (2).
Right side only:
Detach the brake pad wear sensor from the brackets (2) as an additional measure.
Disconnect plug connection (1).
Support rear axle support (1) with workshop jack (2).
Release screws (1) from rear axle support (2).
Lower rear axle support.
Lower workshop jack and place to one side.
Insert special tool 31 5 251 with the helper fully onto the universal jack 00 2 030 .
Insert special tools 31 5 255 in the telescopic supports of a profile rail pair.
Insert special tools 31 5 253 in telescopic supports of other profile rail pair.
Support the rear axle support by operating the universal jack 00 2 030 .
Release left and right shock absorber (2) from trailing arm by unscrewing screw (1).
Release screws (2) on left and right trailing arm bearing support (1) on the body.
Lower rear axle support.
Installation:
Position rear axle support on vehicle.
Tighten screws (2) on left and right trailing arm bearing support (1).
Replace screws (2).
Tightening torque 33 32 5AZ .
Position left and right shock absorber (2) on trailing arm.
Tighten screw (1).
Tightening torque 33 52 1AZ .
Lower the universal jack 00 2 030 with special tool 31 5 251 and put it aside.
Lift rear axle support (1) by means of workshop jack (2).
Tighten screws (1) on rear axle support (2).
Tightening torque 33 31 1AZ .
Attach brake pad wear sensor in the brackets (2).
Connect plug connection (1).
Attach brake pad wear sensor in the brackets (2).
Connect plug connection (1).
Align brake hose (1).
Tighten down hollow nut (2).
See TIGHTENING TORQUE .
Only for rear ride height sensor:
Insert connector (1) on ride height sensor.
Insert connector (1) and lock.
Secure cable (3) with cable clip (2).
Release pedal support.
Required follow-up work:
- Refer to INSTALLING BOTH REAR COIL SPRINGS .
- Refer to INSTALLING TANK COVER ON LEFT AND RIGHT .
- Refer to INSTALLING THE TRAILING ARM COVER ON THE LEFT AND RIGHT .
- Refer to INSTALLING REAR AXLE DIFFERENTIAL .
- Refer to INSTALLING REAR WHEELS .
- Refer to FLUSHING AND BLEEDING THE REAR AXLE BRAKE CIRCUIT .
- Refer to CARRYING OUT WHEEL ALIGNMENT PROCEDURE .