52 25 041 Removing and installing/replacing backrest frame on left or right rear seat

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove LEFT OR RIGHT REAR SEAT

Unlock and disconnect plug connection (1) on drive unit for seat cushion tilt adjustment.

Lever out clips.

Feed out wiring harness.

Fig 1: Identifying Plug Connection On Drive Unit For Seat Cushion Tilt Adjustment

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Unlock and disconnect plug connection (1) on drive unit for forward/back seat adjustment.

Fig 2: Identifying Plug Connection On Drive Unit For Forward/Back Seat Adjustment

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Release screws (1) on left and right.

Remove backrest frame.

Installation note:

Replace micro-encapsulated screws (1).

Tightening torque 52 25 08AZ .

Fig 3: Identifying Backrest Frame Screws

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Replacement only:

Remove BACKREST COVER for rear seat
Remove CONTROL UNIT
Remove LUMBAR SUPPORT
Remove MASSAGE MAT
Remove PUMP for lumbar and massage
Remove valve blocks for LUMBAR SUPPORT and MASSAGE .
Remove FOUR-BAR LEVER on rear seat backrest.

Removing wiring harness:

Unlock plug connections (1) and disconnect.

Feed wiring harness out of backrest frame.

Fig 4: Identifying Plug Connections

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Unfasten plug connection (1) and disconnect.

Remove connector housing (2).

Lever out all clips and remove wiring harness.

Fig 5: Identifying Plug Connection And Connector Housing

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NOTE: The new backrest frame part contains all drives.