BMW 7 Series: Removing And Installing/Replacing Drive Unit For Backrest Angle Adjustment

Necessary preliminary tasks:

• Remove DRIVER'S or PASSENGER seat.
• Remove REAR PANEL ON FRONT SEAT BACKREST
• Remove COVERS ON FRONT SEAT

If necessary, disengage backrest cover (1) on left and right in lower area and lay outwards slightly.

Release screw (4).

Detach metal retaining ring (2) on left and right from drive rod (3).

Installation:

Always replace metal retaining ring (2).

Make sure metal retaining ring (2) is correctly seated.

Fig. 15: Identifying Backrest Cover, Metal Retaining Ring And Drive Rod

Pull out drive rod (1) until drive unit for backrest angle adjustment (2) is free.

Installation: Make sure drive rod (1) is correctly seated in drive unit for backrest angle adjustment (2).

Disconnect plug connection on drive unit for backrest angle adjustment (2).

Feed drive unit for backrest angle adjustment (2) out of backrest frame (3) and remove.

Fig. 16: Pulling Out Drive Rod

NOTE:

• Carry out FUNCTION CHECK WITH ADAPTER CABLE

Replacement:

INITIALIZE backrest adjustment motor.

REMOVING AND INSTALLING/REPLACING DRIVE FOR BACKREST HEAD ADJUSTMENT

Necessary preliminary tasks

• Remove BOTH REAR PANELS ON FRONT SEAT BACKREST

Disconnect plug connection (1).

Release screw (2).

Tightening torque 67 31 4AZ.

Fig. 17: Identifying Plug Connection With Mounting Screws

Pull shaft (1) in direction of arrow out of shaft receptacle (2).

Installation: Make sure shaft (1) is correctly seated in receptacle (2).

Release retaining ring (3).

Feed out drive unit for backrest head adjustment (4) and remove.

Fig. 18: Pulling Shaft Out Of Shaft Receptacle

Removal and installation only

Do not turn spindle (1) in order not to change measurement A.

Replacement

Adopt measurement A of removed drive unit for backrest head adjustment (2). If necessary, adjust measurement A by turning spindle (1).

INITIALIZE drive unit for backrest head adjustment.

Fig. 19: Adjusting Back Rest Head Measurement By Turning Spindle

NOTE:

• Carry out FUNCTION CHECK WITH ADAPTER CABLE

REMOVING AND INSTALLING/REPLACING DRIVE FOR BACKREST HEAD ADJUSTMENT (COMFORT SEATS IN REAR COMPARTMENT)

Necessary preliminary tasks

• Remove LEFT OR RIGHT REAR SEAT

Detach backrest cover (1) from metal eyelets.

Unfasten plug connection (2) and disconnect.

Fig. 20: Identifying Back Rest Cover And Plug Connection

Pull shaft (2) in direction of arrow out of drive.

Installation: Ensure shaft (2) is correctly seated in drive locator.

Release retaining rings (1).

Remove drive for backrest head adjustment from backrest frame.

Fig. 21: Pulling Shaft Out Of Drive

Release retaining rings (1).

Pull shaft (2) in direction of arrow out of drive.

Installation: Ensure shaft (2) is correctly seated in drive locator.

Fig. 22: Pulling Shaft Out Of Drive

Remove drive for backrest head adjustment from backrest frame.

NOTE:

• Carry out FUNCTION CHECK WITH ADAPTER CABLE

Replacement only:

INITIALIZE drive unit for backrest head adjustment.

READ NEXT: