52 17 055 Removing and installing/replacing both adjusting units for backrest width adjustment on driver's seat

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.

NOTE: This removing/installing/replacing procedure applies to "Comfort" seat version.

Necessary preliminary work:

Remove SIDE AIRBAG (front seat)
Remove BACKREST COVER for front seat

Release rivets (1) on left and right and remove trim (2).

Fig 1: Identifying Rivets And Trim

Courtesy of BMW OF NORTH AMERICA, INC.

Release cable tie (1).

Installation:

Lay cables (3) without kinks.

Disconnect plug connection (2) on drive.

Fig 2: Identifying Cable Tie, Cables And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Release rivets (1) on left and right and remove adjusting elements (3).

Release rivets (2) for drive.

Remove complete adjusting unit.

NOTE: Adjusting element, cables and drive form a single unit and can only be replaced completely.

Fig 3: Identifying Adjusting Elements And Rivets

Courtesy of BMW OF NORTH AMERICA, INC.