52 14... Additional work (normal/electric) with defective drive/gear for longitudinal adjustment

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Seat rails must be replaced by detaching worm gear.

Move seat height and seat tilt adjustment to top position.

To obtain improved access if necessary:

Release screws (1).
Tip seat towards rear.

Installation:

Tightening torque, 52 10 6AZ .

Fig 1: Identifying Front Seat Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Lift drive (1) and flex shaft (3) out of guide (2) in direction of arrow.

Detach flex shaft (3) (plug connection).

Fig 2: Detaching Flex Shaft

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove drive (4).

Detach flex shaft (3) with holder (2).

Fig 3: Identifying Flex Shaft, Holder And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Activate the operating switch for the seat position adjustment:

No function:
- Disconnect plug connection on drive.
- Connect new drive and check function.
- Gear is O.K. if drive runs.
Assemble seat.
Drive running:
- Gear for longitudinal seat adjustment defective.

Removing gear for longitudinal seat adjustment:

Release screws (1).

Remove worm gear (2) on left and right with cover.

Fig 4: Identifying Worm Gear And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) on upper rail on left and right.

NOTE: The seat can now be adjusted together with the upper rail.

REMOVE FRONT SEAT .

Replace BOTH SEAT RAILS .

Fig 5: Identifying Upper Rail On Left And Right

Courtesy of BMW OF NORTH AMERICA, INC.