52 13 059 Removing and installing/replacing lumbar support pump with valve housing for lumbar support

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks

Remove REAR PANEL ON FRONT SEAT

Detach backrest cover (1) from backrest frame.

Fig 1: Removing Backrest Cover From Backrest Frame

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Release cable tie (1).

Installation:

Replace defective cable tie.

Open zip fastener (2).

Fig 2: Identifying Cable Tie And Zip Fastener

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Detach cable tie.

Installation:

Replace defective cable ties.

Remove lumbar support pump (1) from backrest frame.

Unfasten plug connection (2) and disconnect.

Unclip air hose from holder (3).

Fig 3: Identifying Lumbar Support Pump With Plug Connection And Air Hose Holder

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Picture shows removal without backrest cover for purposes of clarity.

Pop valve housing (2) for lumbar support in direction of arrow out of backrest frame.

Disengage wiring harness from cable tie (3).

Installation:

Feed rubber plug (1) through backrest frame.

Pull rubber plug (1) and pop valve housing into backrest frame.

Check rubber sleeve of valve housing for correct seating in backrest frame.

Fig 4: Removing Valve Housing For Lumbar Support Out Of Backrest Frame

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Unlock quick connector and detach air hoses (2) and (3 and 4) from valve housing.

Valve unit for lumbar support:

(2) Hose (clear), lumbar drive
(3) Hose (blue), top lumbar cushion
(4) Hose (red), bottom lumbar cushion

NOTE: Connections are coded against incorrect assembly.

Fig 5: Identifying Plug Connection With Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Carry out function check .