52 14 050 Removing and installing/replacing lumbar cushion on front seat

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2008 BMW 335xi, 2008 BMW 335i, 2008 BMW 328xi, 2008 BMW 328i, and 2007 BMW 335xi. 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: Identifying Backrest Cover

G04727100

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock quick connector and detach air hoses (1 and 2) from valve housing (3).

NOTE: Connections are coded against incorrect assembly.

Fig 2: Identifying Air Hoses And Valve Housing

G04727101

Courtesy of BMW OF NORTH AMERICA, INC.

Detach lumbar support (1) from spring wire (2).

Installation:

Attach lumbar support (1) to third and fifth wires from below.

Unclip air hoses (3) and (4) from holder.

Fig 3: Identifying Lumbar Support, Spring Wire And Air Hoses

G04727102

Courtesy of BMW OF NORTH AMERICA, INC.

Press back support (1) a little.

Pull lumbar support (2) up and out.

Feed air hoses out of backrest frame and spring wire.

Fig 4: Identifying Back Support And Lumbar Cushion

G04727103

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Air hoses (3) must not be kinked.

Fig 5: Identifying Air Hoses And Lumbar Support Cushions

G04727104

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Carry out Function Check.