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

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750Li xDrive, and 2015 BMW 740Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

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 8AZ .

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 and massage. See REMOVING VALVE BLOCK FOR LUMBAR SUPPORT and REMOVING MASSAGE VALVE BLOCK .
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.