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

Necessary preliminary tasks: 

• Remove backrest cover from front seat-backrest. See BACKREST COVER FOR DRIVER'S SEAT  or BACKREST COVER FOR FRONT PASSENGER SEAT .

Unlock quick connectors and detach air hoses (1).

Valve unit for lumbar support: 

1. Hose (blue/red), lumbar support

Installation note: 

Connections are coded against incorrect assembly.

Fig 1: Identifying Air Hoses

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Fig 2: Detaching Lumbar Support From Spring Wire

Courtesy of BMW OF NORTH AMERICA, INC.

Detach lumbar support (1) upward from spring wire.

Installation note: 

Attach lumbar support cushion (1) over first and fifth wires.

Installation note: 

Check lumbar support at top (1) and bottom (2) for damage.

Air hoses (3) must be laid without kinks.

Fig 3: Identifying Lumbar Cushion Top/Bottom Sections And Air Hoses

Courtesy of BMW OF NORTH AMERICA, INC.