52 15 059 Lumbar Support Pump With Valve Housing For Lumbar Support/Backrest Width Adjustment

52 15 059 - Removing and installing/replacing lumbar support pump with valve housing for lumbar support/backrest width adjustment





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).





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, 3 and 4) from valve housing.
Valve unit for backrest width adjustment:
(2) - Hose (clear), lumbar drive
(3) - Hose (clear), right lumbar cushion
(4) - Hose (clear), left lumbar cushion

Note:
Connections are coded against incorrect assembly.





Note:
Carry out function check Initial Inspection and Diagnostic Overview.