52 16 050 Removing or installing/replacing lumbar cushion on front seat (M3 sport seat)

WARNING: This page is about a different car, the 2008 BMW M3. 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

Detach backrest cover in marked area.

Fig 1: Detaching Backrest Cover In Marked Area

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Unlock and detach quick connectors from red and green air hoses (1) and (2).

Installation:

Connections are coded against incorrect installation.

Replacement only:

Wrap air hose (green) in contact area with spring wire in fabric adhesive tape (risk of damage).

Fig 2: Identifying Air Hoses

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Lift fleece tabs of lumbar support cushion carrier from plastic clips (1).

Installation:

Hook lumbar support cushion over second and fourth wire.

Disengage springs (2) from spring wire.

Fig 3: Disengaging Springs From Spring Wire

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Feed out lumbar cushion carrier with lumbar cushion between backrest frame and spring wire.

Fig 4: Identifying Lumbar Cushion Carrier

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Installation:

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

Check quick connectors (3) for damage.

Install air hoses without kinks.

Fig 5: Identifying Quick Connectors

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Installation:

Carry out function test .