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52 13 050 Replacing Lumbar Cushion On Front Left Or Right Seat

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Carry out following tasks beforehand: 

  1. Removing rear panel on front seat backrest:

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

Fig 1: Detaching Backrest Cover From Backrest Frame
G03165528Courtesy of BMW OF NORTH AMERICA, INC.
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
G03165529Courtesy of BMW OF NORTH AMERICA, INC.

2 Hose (blue) top cushion

3 Hose (red) bottom cushion

Installation: 

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

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

Fig 3: Unhooking Lumbar Cushion
G03165530Courtesy of BMW OF NORTH AMERICA, INC.

Version with seat heating:

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

Press back support (1) a little.

Fig 4: Pulling Out Lumbar Cushion
G03165531Courtesy of BMW OF NORTH AMERICA, INC.

Turn lumbar cushion (2) and pull out downwards.

Installation: 

  1. Check lumbar cushion (1) at top and (2) bottom for damage.
  2. Fig 5: Checking Lumbar Cushion
    G03165532Courtesy of BMW OF NORTH AMERICA, INC.
  3. Air hoses (3) must not be kinked.

Installation: 

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

Fig 6: Attaching Lumbar Cushion
G03165533Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: For purposes of clarity, shown here without valve housing.

Installation: 

  1. Observe cable guide (1) for backrest heating.
  2. Fig 7: Laying Air Hoses
    G03165534Courtesy of BMW OF NORTH AMERICA, INC.
  3. Lay air hoses (2) without kinks through hole (3).

Installation: 

  1. Check function.