Necessary preliminary tasks

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 335xi, 2010 BMW 335i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Remove REAR PANEL ON FRONT SEAT

Detach backrest cover (1) from backrest frame.

Fig 1: Removing Backrest Cover From Backrest Frame

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 cushion (1) from spring wire (2).

Installation:

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

Fig 3: Identifying Lumbar Cushion, Spring Wire With Air Hoses

G04727102

Courtesy of BMW OF NORTH AMERICA, INC.

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

Press back support (1) a little. Pull out lumbar cushion (2) towards top.

Feed air hoses out of backrest frame and spring wire.

Fig 4: Pressing Back Support

G06900013

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Air hoses (3) must not be kinked.

Fig 5: Identifying Lumbar Cushion And Bottom Areas With Air Hoses

G04727104

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Carry out FUNCTION CHECK .