61 35 085 Removing and installing/replacing control unit/module for left or right seat adjustment (rear Comfort 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.

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD PROTECTION) .

Necessary preliminary tasks:

Disconnect BATTERY EARTH LEAD
Remove THE CENTRE ARMREST FOR THE REAR SEAT BACKREST COMPLETELY

NOTE: For purposes of clarity, the following operations are shown in the released state.

Detach cover (1) from Velcro fastener.

Pull cover (1) upwards out of guide from four-bar lever.

Fig 1: Pulling Cover Upwards Out Of Guide From Four-Bar Lever

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NOTE: For purposes of clarity, graphic shows backrest removed:
Unlock and disconnect all plug connections in marked area.

Installation note:

Plug connections are coded against incorrect assembly.

Fig 2: Disconnecting Plug Connections In Marked Area

Courtesy of BMW OF NORTH AMERICA, INC.

Press control unit against spring and remove towards top.

NOTE: If the rear Comfort seat is defective:
Partially remove the backrest for the seat on the left or right.

Necessary preliminary tasks:

Remove LEFT OR RIGHT REAR SEAT

Release screw (1).

Installation note:

Replace screw (1).

Tightening torque 52 25 05AZ .

Fig 3: Identifying Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew nuts (1).

Carefully raise the seat frame (2) in the direction of arrow.

Installation note:

Replace nuts (1).

Tightening torque 52 25 05AZ .

Fig 4: Raising Seat Frame

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Unlock plug connections (1) and disconnect.

Press control unit against spring and feed out.

Fig 5: Identifying Seat Frame With Plug Connections

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Installation note:

Make sure mounting (1) and retaining tabs (2) of control unit (3) are correctly seated.

Fig 6: Identifying Control Unit, Mountings And Retaining Tabs

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement:

Carry out vehicle PROGRAMMING/ENCODING .