52 14 127 Replacing the valve unit for right lumbar support

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Necessary preliminary tasks:

Partially remove backrest cover. See 52 14 407 REPLACING BACKREST COVER FOR DRIVER'S SEAT (NORMAL/ELECTRIC) , 52 14 408 REPLACING BACKREST COVER FOR FRONT PASSENGER SEAT (NORMAL/ELECTRICAL) , 52 16 407 REPLACING BACKREST COVER (SPORT) FOR DRIVER'S SEAT or 52 16 408 REPLACING BACKREST COVER (SPORT) FOR FRONT PASSENGER SEAT .

Remove valve body (2) from spring wire in direction of arrow.

Unfasten plug connection (1) and disconnect.

Fig 1: Removing Valve Body From Spring Wire

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Check that valve body is correctly seated.

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

Valve unit for lumbar support:

Hose (clear) lumbar support pump
Hose (blue/red), lumbar support

Fig 2: Identifying Air Hoses And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Connections are coded against incorrect assembly.

Connect plug connection (3).

NOTE: Carry out FUNCTION CHECK .