67 31 510 Removing and installing/replacing drive unit for seat tilt adjustment

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 BMW 745i, 2005 BMW 745Li, 2004 BMW 745i, 2004 BMW 745Li, and 2003 BMW 745i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove front seat. Refer to 52 14 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT SEAT (NORMAL/ELECTRIC) or 52 17 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT SEAT (COMFORT) .

NOTE: Front left trim shown removed for purposes of clarity.

Release screws (1).

Fig 1: Folding Back Seat Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Fold back seat rail (2) slightly from seat frame (3) in direction of arrow.

NOTE: Avoid subjecting electric leads to tensile load.

WARNING: Do not move torsion bar. Danger of injury!

Installation:

Make sure plastic bushings (1) are correctly seated in seat rail (2). Faulty plastic bushings (1) cause noises and must be replaced.

Fig 2: Identifying Plastic Bushings In Seat Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1) on drive unit for seat tilt adjustment (2).

Fig 3: Relieving Load On Drive Unit For Seat Tilt Adjustment

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Relieve load on drive unit for seat tilt adjustment (2).

To do so, insert a suitable slotted screwdriver (3) into receptacle (4), press drive unit for seat tilt adjustment (2) downwards slightly using a lever action and release screw (5).

Then slowly move screwdriver (3) upwards and relieve load on drive unit for seat tilt adjustment (2) completely.

Tilt drive unit for seat tilt adjustment (1) upwards and feed out from receptacle (2).

Fig 4: Removing Drive Unit

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, twist out drive unit for seat tilt adjustment (1) at spindle (3) to such an extent that it can be removed.

Comfort seat only:

Replacement:

Initialize drive unit for seat tilt adjustment. Refer to 67 31... NOTES ON INITIALIZING ELECTRIC SEAT SERVODRIVES .