52 15 061 Replacing both cushions for backrest width adjustment on left or right front seat

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, 2015 BMW 328i xDrive, 2015 BMW 328d xDrive, and 2014 BMW 328i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove the REAR PANEL FROM THE FRONT SEAT
Completely drain air cushion for backrest width adjustment

Unclip valve body (1) from seat mechanism and feed out from backrest frame.

Installation note:

Check the valve body (1) for correct fit in the backrest frame and spring wire.

Air hoses must not be kinked.

Fig 1: Valve Body

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock quick connectors and detach air hoses (1).

Valve body for backrest width adjustment:

Lumbar support left/right = hose clear, quick-connector white

Installation note:

Connections are coded against incorrect assembly.

Fig 2: Air Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Removal operation is shown on left side, right analogous to that.
The air cushion must be deflated completely.

Detach spring (1) top and bottom.

Lever out clips.

Feed out air cushion (2) between spring wire and backrest frame.

Fig 3: Removing Spring And Air Cushion

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace faulty clips.

Check air cushion for damage.

Insert air cushion without kinks.

NOTE: Carry out function check