67 31 530 Removing and installing/replacing drive unit for backrest angle adjustment

WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary Preliminary Tasks:

Remove front seat. Refer to 52 14 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT SEAT (NORMAL/ELECTRIC) . and 52 17 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT SEAT (COMFORT) .
Remove rear panel on front seat backrest. Refer to 52 14 198 REMOVING AND INSTALLING / REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL / ELECTRIC) and 52 17 205 REMOVING AND INSTALLING/REPLACING BOTH REAR PANELS ON LEFT OR RIGHT FRONT SEAT BACKREST (COMFORT) .
Remove covers on front seat. Refer to 52 14 040 REMOVING AND INSTALLING/REPLACING OUTER COVER ON LEFT OR RIGHT FRONT SEAT (BASIC/ELECTRIC) and 52 14 041 REMOVING AND INSTALLING INNER COVER ON LEFT OR RIGHT FRONT SEAT (NORMAL/ELECTRIC) .

Unhook backrest cover (1) on left and right on backrest frame (2).

Fig 1: Removing Backrest Cover From Backrest Frame

Courtesy of BMW OF NORTH AMERICA, INC.

Remove metal retaining ring (1) in direction of arrow from drive rod (2).

Installation:

Always replace metal retaining ring (1).

Make sure metal retaining ring (1) is correctly seated.

Unscrew bolt (3).

Disconnect plug connection (4).

Fig 2: Identifying Retaining Ring And Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Pull out drive rod (1) until drive unit for backrest angle adjustment (2) is free.

Installation:

Make sure drive rod (1) is correctly seated in drive unit for backrest angle adjustment (2).

Feed drive unit for backrest angle adjustment (2) out of backrest frame (3) and remove.

Fig 3: Pulling Out Drive Rod

Courtesy of BMW OF NORTH AMERICA, INC.

Comfort Seat Only:

Replacement:

Initialize drive unit for backrest angle adjustment. Refer to 67 31 ... NOTES ON INITIALIZING ELECTRIC SEAT SERVODRIVES .