52 14 820 Replace left or right seat rail

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Necessary preliminary tasks:

Remove lower strap. See 72 11 070 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), DRIVER'S SEAT or 72 11 071 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), FRONT PASSENGER SEAT .
Remove CONTROL UNIT FOR SEAT ADJUSTMENT .
Remove inertia reel. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) .
Remove end fitting. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) from seat rail.

Removal:

Unclip wiring harness (1) from seat rail (2).

Fig 1: Identifying Wiring Harness And Seat Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Counter support bolts (1) (do not turn) and remove nuts.

Remove seat rail.

Fig 2: Identifying Seat Rail Support Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Coat marked contact surfaces with lubricating grease, Klubersynth LF 44-22 (part number 83 23 0 396 713).

Fig 3: Locating Seat Rail Marked Contact Surfaces

Courtesy of BMW OF NORTH AMERICA, INC.

Insert bolt (1) with greased plastic washer (2).

Mount seat rail (3).

NOTE: The hexagon head of the bolt (1) must be correctly seated in hexagon head (4) of seat rail (3).

Fig 4: Inserting Bolt With Greased Plastic Washer

Courtesy of BMW OF NORTH AMERICA, INC.

Counter support bolts (1) (do not turn) and tighten nuts.

Tightening torque 52 14 3AZ .

Fig 5: Identifying Seat Rail Support Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Clip wiring harness (1) into seat rail (2).

Fig 6: Identifying Wiring Harness And Seat Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Install lower strap. See 72 11 070 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), DRIVER'S SEAT or 72 11 071 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), FRONT PASSENGER SEAT .
Mount inertia reel. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) .
Install CONTROL UNIT FOR SEAT ADJUSTMENT .
Mount end fitting. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) onto seat rail.

Fig 7: Inserting Bolt With Greased Plastic Washer
Courtesy of BMW OF NORTH AMERICA, INC.

Necessary preliminary tasks:

Remove lower strap. See 72 11 070 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), DRIVER'S SEAT or 72 11 071 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), FRONT PASSENGER SEAT .
Remove CONTROL UNIT FOR SEAT ADJUSTMENT .
Remove inertia reel. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) .
Remove end fitting. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) from seat rail.

Removal:

Unclip wiring harness (1) from seat rail (2).

Fig 1: Identifying Wiring Harness And Seat Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Grip screws (1) (do not turn) and release nuts.

Remove seat rail.

Fig 2: Identifying Seat Rail Support Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Grease marked contact surfaces with Klubersynth LF 44-22 (Pnr. 83 23 0 396 713) lubricating grease.

Fig 3: Locating Seat Rail Marked Contact Surfaces

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screw (1) with greased plastic washer (2).

Install seat rail (3).

NOTE: Hexagon head of the screw (1) must sit correctly in the hexagon head (4) of the seat rail (3).

Fig 4: Inserting Bolt With Greased Plastic Washer

Courtesy of BMW OF NORTH AMERICA, INC.

Grip screws (1) (do not turn) and tighten nuts.

Tightening torque 52 14 3AZ .

Fig 5: Identifying Seat Rail Support Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Clip in wiring harness (1) from seat rail (2).

Fig 6: Identifying Wiring Harness And Seat Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Install lower strap. See 72 11 070 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), DRIVER'S SEAT or 72 11 071 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), FRONT PASSENGER SEAT .
Install inertia reel. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) .
Install CONTROL UNIT FOR SEAT ADJUSTMENT
Install end fitting See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) to seat rail.

Fig 7: Inserting Bolt With Greased Plastic Washer
Courtesy of BMW OF NORTH AMERICA, INC.

Necessary preliminary tasks:

Remove lower strap. See 72 11 070 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), DRIVER'S SEAT or 72 11 071 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), FRONT PASSENGER SEAT .
Remove CONTROL UNIT FOR SEAT ADJUSTMENT .
Dismantle inertia reel. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) .
Dismantle end fitting. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) from the seat rail.

Removal:

Unclip wiring harness (1) from the seat rail (2).

Fig 1: Identifying Wiring Harness And Seat Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Give counter support to screws (1) (do not turn) and release the nuts.

Remove seat rail.

Fig 2: Identifying Seat Rail Support Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Lubricate marked contact surfaces with Klubersynth LF 44-22 (Tnr. 83 23 0 396 713) lubricating grease.

Fig 3: Locating Seat Rail Marked Contact Surfaces

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screw (1) with greased plastic washer (2).

Mount seat rail (3).

NOTE: hexagon head of the screw (1) must correctly sit in the hexagon head (4) of the seat rail (3).

Fig 4: Inserting Bolt With Greased Plastic Washer

Courtesy of BMW OF NORTH AMERICA, INC.

Give counter support to screws (1) (do not turn) and tighten the nuts.

Tightening torque 52 14 3AZ .

Fig 5: Identifying Seat Rail Support Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Clip in wiring harness (1) from the seat rail (2).

Fig 6: Identifying Wiring Harness And Seat Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Install lower strap. See 72 11 070 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), DRIVER'S SEAT or 72 11 071 REMOVING AND INSTALLING/REPLACING FRONT LOWER STRAP FITTING (BELT TENSIONER), FRONT PASSENGER SEAT .
Mount inertia reel. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) .
Install CONTROL UNIT FOR SEAT ADJUSTMENT .
Mount end fitting. See 72 11 001 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT COMPLETELY ON THE FRONT LEFT or 72 11 002 REMOVING AND INSTALLING/REPLACING FRONT SEAT BELT (COMPLETE) on the seat rail.

Fig 7: Inserting Bolt With Greased Plastic Washer
Courtesy of BMW OF NORTH AMERICA, INC.