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

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove rear panel on front seat backrest. See REAR PANEL (NORMAL / ELECTRIC SEAT) or REAR PANEL (COMFORT SEAT) .

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.

Fig 1: Cut all retainers on lumbar cushion (3) and spring wire

Courtesy of BMW OF NORTH AMERICA, INC.

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.