BMW 7 Owners & Service Manuals

BMW 7 Series: Lowering/Raising Rear Axle Support

Notes

IMPORTANT: Before lowering rear axle support: Observe SAFETY INSTRUCTIONS on raising the vehicle.

In order to avoid damage to lifting platform, perform weight compensation on vehicle.

Load luggage compartment with sand bags.

Necessary preliminary tasks

  • Remove REAR WHEELS
  • F03 only: Remove underguard, side
  • Remove EXHAUST SYSTEM
  • Remove PROPELLER SHAFT from rear axle
  • Expose CABLE FOR EMERGENCY RELEASE UP TO REAR AXLE CARRIER
  • Release and disconnect PLUG CONNECTION ON ACTUATING UNIT (EMF)
  • REMOVE BOTH BRAKE CALLIPERS ON WHEEL CARRIER and tie back
  • Unclip lines for pulse generator and brake pad wear sensor from brackets
  • Unlock and disconnect plug connection on both ride height sensors
  • Remove BOTH SPRING STRUTS FROM WHEEL CARRIER

Engage 31 5 251 with a 2nd person helping completely on workshop jack 00 2 030.

Insert special tools 31 5 255 in telescopic supports of a profile rail pair.

NOTE: In a profile rail pair two profile rails are connected to each by toothing.

Insert special tools 31 5 253 in telescopic supports of other profile rail pair.

Rear Sub-frame
Fig. 76: Inserting Special Tools (31 5 255) In Telescopic Supports Of Profile Rail Pair

Version without Dynamic Drive:

The jacking points on the left side are shown.

Align special tool 31 5 255 with opening in rear suspension subframe.

Align special tool 31 5 253 with cross-member arms on rear suspension subframe.

Rear Sub-frame
Fig. 77: Aligning Rear Suspension Subframe Using Special Tool (31 5 255) And (31 5 253)

Version with Dynamic Drive and Integral Active Steering:

Schematic diagram of rear mounting point (link side) for special tool 31 5 253.

The front mounting point for special tool 31 5 255 is identical - version without Dynamic Drive.

Rear Sub-frame
Fig. 78: Schematic Diagram Of Rear Mounting Point For Special Tool (31 5 253)

Release screws (4).

Tightening torque 33 33 1AZ.

Installation: Arrow (1) on stop plate (2) must point in direction of travel! Remove FRONT COMPRESSION STRUTS (3).

Carefully lower rear axle carrier.

Rear Sub-frame
Fig. 79: Identifying Arrow, Front Compression Strut, Screws And Stop Plate

F03 only: Remove FRONT COMPRESSION STRUTS (1).

Remove rear tension struts (2) and carefully lower rear axle carrier.

Rear Sub-frame
Fig. 80: Identifying Front Tension Struts And Rear Tension Struts

After installation

  • ADJUST PARKING BRAKE

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