Removing and installing/replacing heating and air-conditioning unit (X5 M)
Special tools required:
- 00 9 030
- 17 2 050
Refrigerant circuit is under high pressure!
Follow the safety information for HANDLING TETRAFLUORETHANE REFRIGERANT R134A or HANDLING REFRIGERANT R1234YF .
Avoid contact with refrigerant and refrigerant oil.
Follow safety information for HANDLING REFRIGERANT OIL .
Attention!
Risk of damage!
Restart engine only when air conditioning has been correctly filled.
Follow INSTRUCTIONS for opening and replacing parts in refrigerant circuit.
If Air conditioning is opened for more than 24 h: REPLACE DESICCANT INSERT FOR AIR CONDITIONING .
Required preliminary work for the removal and installation of the heating and air-conditioning unit:
- Drain off AIR CONDITIONING SYSTEM .
- Remove SUPPORT FOR DASHBOARD .
- Unclip the wiring harness mountings from the heating and air-conditioning unit
- Remove CLEANING AIR PIPE .
- Remove ACOUSTIC COVER .
- Remove CENTER CONSOLE .
- Remove INTAKE SILENCER HOUSING .
Required preliminary work for the replacement of the heating and air-conditioning unit and the subsequent modification of the controller drives:
- Remove the RADIO AND IHKA CONTROLS , do not disconnect the plug connections at this time
- Ignition ON
- Use the BMW diagnosis system to move the controller drives into the installation position as follows:
- Service functions
- Body
- Heating and air conditioning functions
- Flap motors
- Installation position of flap motors
- Disconnect ALL PLUG CONNECTIONS FROM THE RADIO AND IHKA CONTROLS .
- Ignition off
- Disconnect NEGATIVE BATTERY LEAD .
- Drain off AIR CONDITIONING SYSTEM .
- Remove SUPPORT FOR DASHBOARD .
- Unclip the wiring harness mountings from the heating and air-conditioning unit
- Remove CLEANING AIR PIPE .
- Remove ACOUSTIC COVER .
- Remove CENTER CONSOLE .
- Remove INTAKE SILENCER HOUSING .
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.
Loosen the screw (1) and remove the refrigerant lines including lid (2) and associated gasket.
Tightening torque 64 53 2AZ .
Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.
On version with heat shield:
Release screws (1).
Unclip the left and right vacuum lines (2) from the holder.
Pull heat shield (3) slightly to the front to gain better access to the coolant hoses (see next work operation).
Attention!
Connections must not be mixed up!
Mark connection sequence of water hoses prior to removal.
Release hose clamps (1) with special tool 17 2 050 and pull off coolant hose.
Release nut (1) and nut (2) underneath.
Tightening torque 64 53 7AZ .
Remove air ducts (1) and (2).
Slacken nut (1).
Tightening torque 64 11 1AZ .
Unscrew nuts (1).
Tightening torque 64 11 1AZ .
Attention!
Cover passenger compartment with protective cover to prevent interior being fouled by escaping coolant.
Remove the heating and air-conditioning unit.
Installation note:
Water drain (1) must be inserted on both sides into water channel (2).
Attention!
In the event of incorrect installation, there is a risk of leakage in the vehicle interior!
Replacement:
- Remount EVAPORATOR .
- Remount HEAT EXCHANGER FOR HEATING SYSTEM .
- Remount EXPANSION VALVE .
- Remount ALL CONTROLLER DRIVES .
After installation:
- Evacuate and fill AIR CONDITIONING .
- Fill and vent COOLING SYSTEM .