52 13 050 Replacing lumbar cushion on front left or right seat

Carry out following tasks beforehand: 

Removing rear panel on front seat backrest:

• Basic seat, see 52 13 198 Removing and installing / replacing rear panel on left or right front seat backrest (normal/manual) 
• Sports seat, see 52 15 198 Removing and installing/replacing rear panel on front left or right seat backrest (sports/manual) .

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

Fig 1: Removing Backrest Cover From Backrest Frame

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect hoses (2) and (3) from valve housing (1).

2 Hose (blue) top cushion

3 Hose (red) bottom cushion

Installation: 

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

Fig 2: Hoses And Valve Housing

Courtesy of BMW OF NORTH AMERICA, INC.

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

Version with seat heating:

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

Fig 3: Spring Wire And Slide Cable

Courtesy of BMW OF NORTH AMERICA, INC.

Press back support (1) a little.

Turn lumbar cushion (2) and pull out downwards.

Fig 4: Pulling Out Lumbar Cushion

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Check lumbar cushion (1) at top and (2) bottom for damage.

Air hoses (3) must not be kinked.

Fig 5: Air Hoses And Lumbar Cushion

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

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

Fig 6: Lumbar Cushion And Wire

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Observe cable guide (1) for backrest heating.

Lay air hoses (2) without kinks through hole (3).

Fig 7: Cable Guide And Hoses

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Installation: 

Check function.