52 13 059 Lumbar Support Pump With Valve Housing For Lumbar Support

52 13 059 - Removing and installing/replacing lumbar support pump with valve housing for lumbar support





Necessary preliminary tasks:
- Remove rear panel on front seat 52 13 198 Rear Panel on Left or Right Front Seat Backrest





Detach backrest cover (1) from backrest frame.





Release cable tie (1).

Installation:
Replace defective cable tie.

Open zip fastener (2).





Detach cable tie.

Installation:
Replace defective cable ties.

Remove lumbar support pump (1) from backrest frame.

Unfasten plug connection (2) and disconnect.
Unclip air hose from holder (3).





Note:
Picture shows removal without backrest cover for purposes of clarity.

Pop valve housing (2) for lumbar support in direction of arrow out of backrest frame.

Disengage wiring harness from cable tie (3).

Installation:
Feed rubber plug (1) through backrest frame.
Pull rubber plug (1) and pop valve housing into backrest frame.
Check rubber sleeve of valve housing for correct seating in backrest frame.





Unfasten plug connection (1) and disconnect.
Unlock quick connector and detach air hoses (2) and (3 and 4) from valve housing.
Valve unit for lumbar support:
(2) - Hose (clear), lumbar drive
(3) - Hose (blue), top lumbar cushion
(4) - Hose (red), bottom lumbar cushion

Note:
Connections are coded against incorrect assembly.





Note:
Carry out function test 52 14 ... Performing Function Check With Adapter Cable (For Seat Repairs).