52 13 050 Replacing lumbar cushion on front left or right seat

WARNING: This page is about a different car, the 2003 BMW X5 and 2002 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Carry out following tasks beforehand:

Removing rear panel on front seat backrest:

Basic seat, refer to 52 13 198 REMOVING AND INSTALLING/REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL/MANUAL) .
Sports seat.

Detach backrest cover (1) from backrest frame (2).

Fig 1: Detaching Backrest Cover

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

Housing (valve block) must not be unclipped (leaks).

If it is unclipped, release screw and clip housing together.

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

Fig 2: Disconnecting Hoses And From Valve Housing

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2 Hose (blue) top cushion

3 Hose (red) bottom cushion

Installation:

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

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

Version with seat heating:

Slide cable (3) for backrest heating to one side a little.

Fig 3: Unhooking Lumbar Cushion From Spring Wire

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Press back support (1) a little.

Turn lumbar cushion (2) and pull out downwards.

Fig 4: Pressing Back Support

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Installation:

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

Air hoses (3) must not be kinked.

Fig 5: Checking Lumbar Cushion

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Installation:

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

Fig 6: Attaching Lumbar Cushion

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

Installation:

Observe cable guide (1) for backrest heating.

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

Fig 7: Cable Guide & Air Hoses Installed Position

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Installation:

Check function.