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

WARNING: This page is about a different car, the 2007 BMW M6, 2006 BMW M6, 2005 BMW 645Ci, and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

NOTE: For special tools, refer to SEATS - SPECIAL TOOLS - 645CI (E63) .

52 0 050
64 1 020

Necessary preliminary tasks:

Remove rear panel on front seat, refer to 52 14 198 REMOVING AND INSTALLING/REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL/ELECTRIC) or 52 16 198 REMOVING AND INSTALLING/REPLACING REAR PANEL ON FRONT LEFT OR RIGHT SEAT BACKREST (SPORTS/ELECTRIC) .

Detach tensioning cables (1) from backrest frame.

Disconnect all retainers.

Detach partial cover (2) from backrest frame.

Fig 1: Detaching Tensioning Cables From Backrest Frame

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Installation:

Lock new retainers by bending with special tool 52 0 050.

Detach drive unit (1) for lumbar cushion from backrest frame.

Installation:

If necessary, use new adhesive tape (double-sided).

Detach backrest cover (2) from backrest frame by lifting out piping.

NOTE: If necessary, use special tool 64 1 020.

Fig 2: Detach Backrest Cover From Backrest Frame By Lifting Out Piping

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NOTE: If necessary, gently heat air hose when firmly seated.

Disconnect hoses (2) and (3) from valve housing (1).

2 Hose (blue) top cushion

3 Hose (red) bottom cushion

Fig 3: Disconnecting Hoses From Valve Housing

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Installation:

Air hoses (2) and (3) must be laid without kinks.

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

Version with seat heating:

Slide cable (3) for seat heating to one side.

Fig 4: Detaching Lumbar Cushion From Spring Wire

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Press back support (1) a little.

Turn lumbar cushion (2) and pull out downwards.

Fig 5: Removing Lumber Cushion

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Installation:

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

Air hoses (3) must not be kinked.

Fig 6: Identifying Lumber Cushion And Air Hoses

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Installation:

Attach lumbar cushion (1) to third wire (2) above spring (3).

Fig 7: Attaching Lumbar Cushion To Third Wire Above Spring

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NOTE: For purposes of clarity, shown here without valve housing.

Installation:

Pay attention to seat heating cable guide (1).

Lay air hoses (2) without kinks through hole (3).

Fig 8: Identifying Seat Heating Cable Guide, Air Hoses Without Kinks

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Installation:

Check function.