52 17 020 Removing And Installing/Replacing Seat Frame On Left Or Right Front Seat (Comfort)

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove front seat See 52 14 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT SEAT (NORMAL/ELECTRIC) .
Remove both rear panels on front seat backrest. See 52 14 198 REMOVING AND INSTALLING / REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL / ELECTRIC) .
Remove outer cover . See 52 14 040 REMOVING AND INSTALLING/REPLACING OUTER COVER ON FRONT LEFT OR RIGHT SEAT (NORMAL/ELECTRIC) .
Remove inner cover on front seat. See 52 14 041 REMOVING AND INSTALLING INNER COVER ON LEFT OR RIGHT FRONT SEAT (NORMAL/ELECTRIC) .
Remove adjustment unit for thigh support. See 52 17 023 REMOVING AND INSTALLING/REPLACING ADJUSTING UNIT FOR THIGH SUPPORT ON LEFT OR RIGHT FRONT SEAT .
Remove backrest frame on front seat. See 52 14 030 REMOVING AND INSTALLING/REPLACING BACKREST FRAME ON LEFT OR RIGHT FRONT SEAT .
If necessary, remove drive unit for active seat. See 67 31 500 REMOVING AND INSTALLING/REPLACING DRIVE UNIT FOR LONGITUDINAL SEAT ADJUSTMENT .

Remove wiring harness (1) from seat frame (2).

Fig 1: Identifying Wiring Harness And Seat Frame

Courtesy of BMW OF NORTH AMERICA, INC.

Release rivets (1) on left and right, remove fastening strips (2) on left and right.

Release screws (3).

Tightening torque. See SEATS - TIGHTENING TORQUES - ALPINA .

Remove seat frame.

Fig 2: Identifying Rivets And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

When replacing backrest or seat frame, break off centering hooks (1) from seat frame.

Fig 3: Identifying Centering Hooks

Courtesy of BMW OF NORTH AMERICA, INC.

The new seat frame part contains all the drives.