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Home >> BMW >> 2013 >> 740Lxi >> Repair and Diagnosis >> External Pages >> Different car >> Section 475 (Seats - Repair) >> Front Seat, Normal, Electric >> 67 31 500 Removing and installing/replacing forward/back seat adjustment drive unit >> Installing forward/back seat adjustment motor

Installing forward/back seat adjustment motor

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.

Insert short flex shaft (2).

Attach rubber grommet (1).

Fig 1: Inserting Short Flex Shaft
G08508739Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Attach rubber grommet at 60° angle to connector housing.

Fig 2: Identifying Rubber Grommet Installation Angle
G08508740Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Long Flex Shaft, Sleeve Tube And Plastic Part
G08508741Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Attach Unified Parts Group to motor at 60° angle to connector housing so that it cannot twist.

Fig 4: Identifying Motor Installation Angle
G08508742Courtesy of BMW OF NORTH AMERICA, INC.

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

Insert flex shaft.

Fig 5: Sliding Seat Rail
G08508743Courtesy of BMW OF NORTH AMERICA, INC.
Fig 6: Identifying Short And Long Flex Shaft
G08508744Courtesy of BMW OF NORTH AMERICA, INC.

Slide short flex shaft (1) into longitudinal 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 note: 

PTFE hoses are shrink-fitted onto end pieces.

Check that hoses are free from damage.

Fig 7: Identifying PTFE Hoses End Pieces
G08508745Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: