Removing forward/back seat adjustment motor

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2015 BMW 750i, 2015 BMW 750Li, and 2015 BMW 740i. However, it is still accessible from the selected car via links, so may be relevant.

Unfasten plug connection (1) and disconnect.

Fig 1: Identifying Plug Connection

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Unlock retaining tabs.

Lift drive (1) with flex shaft out of guide in direction of arrow.

Pull flex shaft on left and right out of gearing.

Fig 2: Lifting Drive With Flex Shaft Out Of Guide

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Slide seat back.

Release screws (1) at front.

Fig 3: Identifying Seat Screws At Front

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Slide seat forwards.

Release screws (1) at rear.

IMPORTANT: Cover door sill with protective covers (risk of damage).

Lift out front seat.

Fig 4: Identifying Seat Screws At Rear

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Installing forward/back seat adjustment motor:

Insert short flex shaft (1).

Attach rubber grommet.

Fig 5: Inserting Short Flex Shaft

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Installation:

Attach rubber grommet at 60° angle to connector housing.

Fig 6: Identifying Rubber Grommet Installation Angle

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Insert long flex shaft (1) with sleeve tube (2) and rubber grommet in plastic part (3).

Fig 7: Identifying Long Flex Shaft, Sleeve Tube And Plastic Part

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Installation:

Attach assembly to motor at 60° angle to connector housing so that it cannot twist.

Fig 8: Identifying Motor Installation Angle

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Slide seat rail with opening forwards or back until bushing for flex shaft mounting of worm gear is flush.

Insert flex shaft.

Fig 9: Sliding Seat Rail

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Fig 10: Identifying Short Flex Shaft And Long Flex Shaft

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Slide short flex shaft (1) into forward/back seat adjustment gearing square.

Bend long flex shaft (2) upwards and slide into longitudinal seat adjustment gearing.

Clip motor and flex shafts into carrier plate.

Installation:

PTFE hoses are shrink-fitted onto end pieces.

Check that hoses are free from damage.

Fig 11: Identifying PTFE Hoses

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Installation:

Make sure flex shaft is correctly fitted on motor
Carpet must not get between seat rails and floor panel in area of attachment points (squeaking noises)
Powerlok screws must be replaced and must not be reused
Powerlok screws are mechanical screw locks with tri-lobular threads
Insert all screws loose to avoid twisting
Tighten down all screws to specified torque

Tightening torque 52 10 1AZ .