BMW 7 Owners & Service Manuals

BMW 7 Series: Replace Electrical Steering Box (EPS)

IMPORTANT: Steering box:

Check connection of steering box for corrosion, clean contacts if necessary.

The steering box must be replaced if the corrosion is too far advanced.

Connecting line:

In the event of moisture/corrosion inside the two plug connections, check the insulation of the connecting line. If the insulation reveals any noticeable/striking features, partial replacement will be necessary. Otherwise it will be sufficient to replace the contacts or connector housing.

NOTE: In a warranty case you must always provide a fault memory printout, even where there is no fault entry, with the defective part.

Necessary preliminary work:

  • Disconnect BATTERY EARTH LEAD

NOTE: High-current-carrying wiring laid with terminal 30 (80 A fuse).

  • Remove underbody protection at FRONT and REAR
  • Remove COVER FOR STEERING ASSEMBLIES on left and right
  • Remove stiffening plate
  • Remove TRACK ROD END on both sides from swivel bearing
  • Remove LOWER SECTION of steering shaft from steering box
  • Version with Dynamic Drive:
    • Remove ANTI-ROLL BAR LINK ON RIGHT OF ANTI-ROLL BAR

Unlock plug connection (1) and disconnect.

Steering Gear With Servo Unit
Fig. 56: Identifying Connectors

Release screws (1).

Lay holder (2) with wiring to one side.

Steering Gear With Servo Unit
Fig. 57: Identifying Holder And Screws

Release screws (1) and tie anti-roll bar (2) to front axle support.

Tightening torque 31 35 1AZ.

Steering Gear With Servo Unit
Fig. 58: Identifying Anti-Roll Bar Link With Screws

Release screws (1).

Tightening torque 32 00 1AZ Installation note: Replace screws.

Steering Gear With Servo Unit
Fig. 59: Identifying Steering Box Screws

IMPORTANT: Risk of damage! Plug connection (1) on electrical steering box must not be damaged when removing.

Remove steering box with wiring harness downward.

Steering Gear With Servo Unit
Fig. 60: Identifying Con

Installation note: Modify TRACK ROD END on left and right.

After installation:

  • Carry out PROGRAMMING/ENCODING
  • Teach in END STOP SOFTWARE
  • Perform CHASSIS / WHEEL ALIGNMENT CHECK

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