Draw off and dispose of contaminated refrigerant R1234yf
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
General information
Precondition
Engine at operating temperature and switched off.
Chapter
1 - Draw off and dispose of contaminated refrigerant R1234yf
Parts required: NOTICES FOR OPENING AND PART EXCHANGE IN REFRIGERANT CIRCUIT .
WARNING:
Contact with hazardous substances.
Injury hazard!
Injury hazard!
- Note and follow safety instructions on containers.
- Conduct all work in appropriate personal protective equipment only.
NOTE:
TECHNICAL INFORMATION
Use the following procedure only when the A/C service station detects contaminated refrigerant R1234yf prior to drawing off the refrigerant circuit. Observe national/country-specific regulations!
Use the following procedure only when the A/C service station detects contaminated refrigerant R1234yf prior to drawing off the refrigerant circuit. Observe national/country-specific regulations!
- Please note additional information!
- Place cooler box in front of the vehicle as shown.
- Place the mounting for the pressure cylinder into the cooler box.
- Place the pressure cylinder into the cooler box.
- Connect the connecting hose on the valve of the pressure cylinder.
- Open the valve on the pressure cylinder.
- Let the blower of the heating and air conditioning system run at the medium setting.
- Wear safety goggles and protective gloves.
- Connect the connecting hose to the low-pressure connection on the vehicle.
- Preparing operating fluid for cooling.
- Fill the cooler box with operating fluid for cooling at the side of the pressure cylinder and distribute evenly.
- Do not cover the upper section of the pressure cylinder with the valve with operating fluid!
- Open the low-pressure connection on the vehicle.
- Draw off the refrigerant circuit for 30 minutes.
- Close the low-pressure connection on the vehicle and the valve on the pressure cylinder.
- Remove the connecting hose.
- Place the cooler box with the pressure cylinder in a warm location to allow the remaining operating fluid for cooling to evaporate.
- Take off the protective equipment.
- Remove the air conditioning compressor.
- Drain the refrigerant oil from the air conditioning compressor into a measuring cup.
- Write down the drained amount of refrigerant oil.
- Dispose of the drained refrigerant oil.
- Fill in fresh refrigerant oil that is approved for the vehicle: Filling capacity = recorded quantity + 15 ml
- Install the air conditioning compressor.
- Evacuate the refrigerant circuit twice.
- Fill the refrigerant circuit with R1234yf (amount of refrigerant as per type plate).
- Fill out the delivery note and hand over the pressure cylinder to the waste management company.