When replacing the backrest frame: Remount components

Removing backrest width adjustment with valve (M CFRP bucket seat) 

• Carefully release all the marked attachment points of the backrest width adjustment (1).
• Unlock plug connections (2) and disconnect.
• Release the yellow-marked cables and lines from the backrest frame carefully  .
• Remove the backrest width adjustment with valve (1).

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  Removing the cushion support (M CFRP bucket seat) 

  NOTE: RISK OF DAMAGE 
  Careless handling of tools and sharp-edged components  .
  Scratches, surface damage  .

  • Protect working area.
  • Handle tools and components carefully.
  NOTE: Description is for left component only. Procedure on the right side is identical.
• Release the screws (1) on the cushion support (2).

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• Unclip the cushion support (1) from the detents of the support tube (2) in the arrow direction carefully  and remove.

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  Removing the side airbag (M CFRP bucket seat) 

  WARNING: Pyrotechnic components  .
  Danger! Immobilization period-threatening injuries! 

  • All work on pyrotechnic parts may be carried out by technically experienced and appropriately trained personnel only.
  • Replace any damaged part or ones that have been dropped.
  • For additional information see: 72 00 SAFETY REGULATIONS ON HANDLING COMPONENTS WITH GAS GENERATORS .
  WARNING: Airbag unit  .
  Danger! Immobilization period-threatening injuries! 

  • Before performing any work on the airbag, always disconnect the battery ground lead from the battery.
  • Airbag unit may only be set down with the cushion (airbag itself) facing upwards.
  • For additional information see: 72 00 SAFETY REGULATIONS ON HANDLING COMPONENTS WITH GAS GENERATORS .
  NOTE: RISK OF DAMAGE 
  Careless handling of tools and sharp-edged components  .
  Scratches, surface damage  .

  • Protect working area.
  • Handle tools and components carefully.
• Release nuts (1).
• Remove the side airbag (2) from the backrest frame (3).

  Unlock the plug connection of the side airbag (1) and disconnect.

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  Remove the release mechanism from the front seat (M CFRP bucket seat) 

  NOTE: RISK OF DAMAGE 
  Careless handling of tools and sharp-edged components  .
  Scratches, surface damage  .

  • Protect working area.
  • Handle tools and components carefully.
• Unlock plug connection (1) and disconnect.
• Unscrew the screw (2) from the drive system (3) for the backrest tilt adjustment.

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• Position the drive system (1) for backrest tilt adjustment on the drive linkage (2) of the backrest tilt adjustment in the arrow direction as shown so that the Bowden cable of the release mechanism (3) is accessible.

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  NOTE: The operations shown only for one side must be carried out on both sides.
• Unclip the Bowden cable (1) from the holder (2).
• Carefully  guide the Bowden cable (1) out of the unlocking mechanism of the rear seat backrest (3).

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• Release the screws (1) of the release mechanism (2).

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• Carefully guide the release mechanism (1) out of the backrest frame (2).

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  Remounting small parts 

  NOTE: TECHNICAL INFORMATION 
  Different variants may be installed depending on the vehicle equipment.
  NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.
  NOTE: During a replacement, remount all installed parts and/or replace as necessary.
• Remount all installed parts of the seat frame/backrest frame that are not included among the new parts.

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  Installing the release mechanism on the front seat (M CFRP bucket seat) 

  NOTE: RISK OF DAMAGE 
  Careless handling of tools and sharp-edged components  .
  Scratches, surface damage  .

  • Protect working area.
  • Handle tools and components carefully.
• Position the release mechanism (1) carefully at the backrest frame (2) as depicted.

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• Tighten the screws (1) of the release mechanism (2).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Release mechanism to backrest frame (M CFRP bucket seat)
  M6x10 screw	Tightening torque	6 Nm

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  NOTE: The operations shown only for one side must be carried out on both sides.
• Carefully feed in the Bowden cable (1) as shown into the unlocking of the rear seat backrest (3).
• Clip in the Bowden cable (1) into the holder (2).

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• Position the drive system (1) for backrest tilt adjustment correctly in arrow direction on the holder for the drive system of the backrest tilt adjustment (2).

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• Position the drivetrain for backrest tilt adjustment (3) as shown.
• Tighten the screw (2) from the drivetrain for backrest tilt adjustment (3).
• Connect connectors (1) and lock.

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  Installing the side airbag (M CFRP bucket seat) 

  WARNING: Pyrotechnic components  .
  Danger! Immobilization period-threatening injuries! 

  • All work on pyrotechnic parts may be carried out by technically experienced and appropriately trained personnel only.
  • Replace any damaged part or ones that have been dropped.
  • For additional information see: 72 00 SAFETY REGULATIONS ON HANDLING COMPONENTS WITH GAS GENERATORS .
  WARNING: Airbag unit  .
  Danger! Immobilization period-threatening injuries! 

  • Before performing any work on the airbag, always disconnect the battery ground lead from the battery.
  • Airbag unit may only be set down with the cushion (airbag itself) facing upwards.
  • For additional information see: 72 00 SAFETY REGULATIONS ON HANDLING COMPONENTS WITH GAS GENERATORS .
  NOTE: RISK OF DAMAGE 
  Careless handling of tools and sharp-edged components  .
  Scratches, surface damage  .

  • Protect working area.
  • Handle tools and components carefully.
• Position the side airbag (2) in the backrest frame (3) correctly.

  Connect the connector of the side airbag (1) and lock.

• Tighten nuts (1).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Airbag on the backrest frame
  Nut Replace nut.	tightening torque	6.5 Nm

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  Installing the cushion support (M CFRP bucket seat) 

  NOTE: RISK OF DAMAGE 
  Careless handling of tools and sharp-edged components  .
  Scratches, surface damage  .

  • Protect working area.
  • Handle tools and components carefully.
  NOTE: Description is for left component only. Procedure on the right side is identical.
• Carefully  clip the seat cushion support (1) into the detents of the support tube (2) in the arrow direction.

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• Tighten the screws (1) on the cushion support (2).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Upholstered support to the backrest frame
  Oval-head screw with collar	Tightening torque	6.5 Nm

  Courtesy of BMW OF NORTH AMERICA, INC.

  Install backrest width adjustment with valve (M CFRP bucket seat) 

• Position the backrest width adjustment (1) with the valve as depicted.
• Position cables and lines marked in yellow in the backrest frames as depicted.
• Clip in all marked attachment points of the backrest width adjustment (1).
• Connect connectors (2) and lock.

  Courtesy of BMW OF NORTH AMERICA, INC.