Lowering/raising rear axle support (AWD) (X2 xDrive 28i 2018-2023, X2 M35i 2019-2022)
Special tools required:
- 31 5 250
- 00 2 030
- 31 5 255
- 31 5 256
- 31 5 251
Failure to comply with the following instructions may result in the vehicle slipping off the vehicle hoist 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 BOTH REAR WHEELS .
- Refer to REMOVING COMPLETE EXHAUST SYSTEM .
- Refer to REMOVING THE LEFT AND RIGHT TRAILING ARM COVERS .
- Refer to REMOVING THE TANK COVER ON THE LEFT AND RIGHT .
Lowering:
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.
Remove heat shield (1).
Unfasten screws (1).
Remove cover (2).
Disconnect connector (1).
Release cable (2) from control unit holder.
Only for rear ride height sensor:
Disconnect connector (1).
Release screw (1) of anti-roll bar links on left and right on trailing arm.
Release hollow nut (2).
Detach brake hose (1) on left and right from brake line.
Unlock and disconnect connectors (1) on the right and left.
Release cable (3) on left and right from cable clip (2).
Insert special tool 31 5 250 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 5 256 in telescopic supports of the other profile rail pair.
Align special tools 31 5 256, 31 5 255 and 31 5 251 with the rear axle support.
Support the rear axle support by actuating the workshop jack 00 2 030 .
Secure rear axle support with tensioning strap to special tool 31 5 251.
Release screws (1) from cross member.
Release screws (2) from rear axle support.
Lower rear axle support by max. A = 100 mm.
Raising:
Installation note:
Check threads for damage; if necessary, repair with HELICOIL THREAD INSERTS .
Align and raise rear axle support.
Tighten screws (2) on rear axle support.
Tightening torque 33 31 1AZ .
Tighten screws (1) on cross member.
Tightening torque 33 31 3AZ .
Connect plug connections (1) on left and right.
Secure cable (3) on left and right with cable clip (2).
Align brake hose (1), left and right.
Tighten down hollow nut (2).
See TIGHTENING TORQUE .
Tighten down anti-roll bar links on left and right with screw (1) on trailing arm.
Tightening torque 33 55 2AZ .
Only for rear ride height sensor:
Insert connector (1) on ride height sensor.
Fasten cable (2) on control unit holder.
Connect connector (1) to control unit.
Position cover (2).
Tighten down screws (1).
Tightening torque 33 31 8AZ .
Install heat shield (1).
Release pedal support.
Required follow-up work:
- Refer to INSTALLING TANK COVER ON LEFT AND RIGHT .
- Refer to INSTALLING TRAILING ARM COVER , left and right.
- Refer to COMPLETELY INSTALLING THE EXHAUST SYSTEM .
- Refer to INSTALLING BOTH REAR WHEELS .
- Refer to FLUSHING AND BLEEDING THE REAR AXLE BRAKE CIRCUIT .