52 14 050 Replacing lumbar cushion on front left or right seat

WARNING: This page is about a different car, the 2010 BMW 535xi, 2009 BMW 535xi, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

52 0 050

Necessary preliminary tasks:

Remove rear panel on front seat backrest. See REMOVING AND INSTALLING / REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL / ELECTRIC) or REMOVING AND INSTALLING/REPLACING BOTH REAR PANELS ON LEFT OR RIGHT FRONT SEAT BACKREST (COMFORT) .

Fig 1: Identifying Backrest Cover, Air Hoses And Lumbar Cushion

Courtesy of BMW OF NORTH AMERICA, INC.

Detach backrest cover (1) at bottom from backrest frame.

Remove VALVE HOUSING .

Disconnect air hoses (2) from valve housing.

NOTE: Heat air hoses gently if they are firmly seated on valve housing.
Housing of valve block must not be unclipped (leakage). If necessary, release mounting and clip housing together.

If necessary, cut all retainers on lumbar cushion (3) and spring wire.

NOTE: Remove all remnants of retainers. Lock new retainers by bending with special tool 52 0 050 .

Detach lumbar cushion (3) from spring wire.

Remove lumbar cushion (3) downwards between backrest frame and seat mechanism.

Installation:

Make sure air hoses are correctly connected to valve block (color coding).

Air hoses must be laid without kinks.

Check lumbar cushion for damage.