52 15 059 Removing and installing/replacing lumbar support pump with valve body for lumbar support/backrest width adjustment

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 REAR PANEL

Cut open cable straps (arrows).

Installation note:

Replace defective cable straps.

Remove lumbar support pump (1) from backrest frame.

Unfasten plug connection (2) and disconnect.

Unclip air hose from holder (3).

Fig 1: Lumbar Support Pump With Plug Connection And Air Hose Holder

Courtesy of BMW OF NORTH AMERICA, INC.

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 2: Valve Body

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (2) and disconnect.

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 3: Plug Connection And Air Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Run a function check.