52 13 060 Removing and installing / replacing valve housing for left or right lumbar support, front (normal / manual)

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Carry out following tasks beforehand:

Remove rear panel on front seat backrest. See 52 13 198 Removing and installing / replacing rear panel on left or right front seat backrest (normal/manual)

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

Fig 1: Detaching Backrest Cover From Backrest Frame

Courtesy of BMW OF NORTH AMERICA, INC.

Version with lumbar support and backrest width adjustment only:

Detach hoses (1) and (2) at cutting line (heat with hot air blower if necessary).

Hose (blue) upper cushion (lumbar support)
Hose (red) lower cushion (lumbar support)
Hose (white) right cushion (backrest width adjustment)
Hose (white) left cushion (backrest width adjustment)
Motor pump unit (drive unit)

Remove drive unit. See 67 66 010 REMOVING AND INSTALLING/REPLACING LUMBAR SUPPORT DRIVE MECHANISM ON FRONT SEAT, LEFT OR RIGHT

Fig 2: Detaching Hoses (1 Of 2)

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Unfasten plug connection (1).

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

Disconnect hoses (3)... (5) from valve housing (2).

3 Hose (blue) top cushion

4 Hose (red) bottom cushion

5 Hose (transparent), lumbar support pump (on housing black)

Fig 3: Detaching Hoses (2 Of 2)

Courtesy of BMW OF NORTH AMERICA, INC.

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 4: Laying Air Hoses Without Kinks Through Hole
Courtesy of BMW OF NORTH AMERICA, INC.

Slacken screw (1) from inside.

Detach valve housing (3) from metal nut (2).

Fig 5: Detaching Valve Housing From Metal Nut

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Installation:

Housing parts (1)... (4) must not be unclipped (leakage).

If housing is unclipped, clip valve housing together.

Check function.

Fig 6: Identifying Housing Parts

Courtesy of BMW OF NORTH AMERICA, INC.