Removing and installing/replacing heating and air-conditioning unit

Special tools required: 

• 17 2 050
• 32 1 270

Refrigerant circuit is under high!

Avoid contact with refrigerant and refrigerant oil.

Read and comply with safety instructions: 

• NOTE  for handling r134a refrigerant or SAFETY INSTRUCTIONS  for handling refrigerant r1234yf
• NOTE  handling refrigerant fluid.

Attention! 

Risk of damage!

Restart engine only when air conditioning has been correctly filled.

Follow the INSTRUCTIONS  for opening and the part exchange in the refrigerant circuit!

If the air conditioning system is open for longer than 24 hours:  replace the AIR CONDITIONING CONDENSER .

Required preliminary work  for the removal and installation  of the heating and air-conditioning unit:

• Drain off AIR CONDITIONING SYSTEM .
• Remove the support for the INSTRUMENT PANEL .
• Remove EXPANSION VALVE .

Required preliminary work  for the replacement of the heating and air-conditioning unit and the associated remounting of the controller drives: 

• Ignition ON
• Using the diagnostic system, move the controller drives in the installation position via the following path: 
  • Service functions
  • Body
  • Heating and air conditioning functions
  • Flap motors
  • Installation position of flap motors
• Disconnect all the plug connections from the CONTROL UNIT  for the heating/air conditioning system.
• Ignition off
• Disconnect NEGATIVE BATTERY CABLE .
• Drain off AIR CONDITIONING SYSTEM .
• Remove the support for the INSTRUMENT PANEL .
• Remove EXPANSION VALVE .

Removal: 

Recycling 

Coolant emerges when coolant lines are detached. Have a suitable collecting vessel ready.

Catch and dispose of escaping coolant.

Observe country-specific waste disposal regulations.

Attention! 

Connections must not be mixed up!

Mark connection sequence of water hoses prior to removal.

Release hose clamps (1) using special tool 17 2 050 and detach coolant hoses (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug Connection (1) and disconnect.

Disengage cable clip (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Attention! 

Carefully blow out coolant connections on heat exchanger to remove remaining coolant.

Seal the openings or lines on the heat exchanger using special tool 32 1 270 to avoid media output and contamination.

Unfasten plug connection (1) and disconnect.

Remove heating and air-conditioning unit (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement: 

Operation is described in:  REPLACING EVAPORATOR  . 

Installation: 

Courtesy of BMW OF NORTH AMERICA, INC.

Attention! 

An incorrect installation poses a risk of water damage in the vehicle interior!

Installation note: 

Spray the condensate drain (2) with G14 lubricant (sourcing reference applicable BMW Parts catalog/Department) before installing the heating and air-conditioning unit (1).

Heating and air-conditioning unit (1) must fit exactly on condensate drain (2).

Perform a visual inspection after installing the heating and air-conditioning unit (1).

Join plug connection (1) to heating and air-conditioning unit (2) and lock.

Courtesy of BMW OF NORTH AMERICA, INC.

Join and lock plug connection (1).

Engage cable clip (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Attention! 

Connections must not be mixed up!

Mark connection sequence of water hoses prior to removal.

Slide on coolant hoses (2) and secure hose clamps (1) using special tool 17 2 050.

Courtesy of BMW OF NORTH AMERICA, INC.

Attention! 

The system must not be filled and vented in ECO PRO driving mode!

Required follow-up work: 

• Install the support for the INSTRUMENT PANEL .
• Install EXPANSION VALVE .
• Evacuate and charge CONDITIONING .
• Vent and fill COOLING SYSTEM .