Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Heating And A/C Unit
Special tools and workshop equipment required
- Hose Clamps, Up to 40 mm. 3093
- Hose Clamps Up to 25 mm dia.3094
- Hand pump Cooling system tester V.A.G 1274/ (and corresponding adapter)
- Compressed air gun, commercially available
Removal
- Before disconnecting battery, obtain anti-theft radio security code if necessary.
- On vehicles with electrically adjustable seats, move the seats back as far as possible before disconnecting the battery. Refer to Removal and Installation .
- When removing bolts, take note of the length and assignment of bolts for re-installation.
- All cable ties opened or cut during removal of heating A/C unit must be reinstalled at the same locations during installation.
- Depending on vehicle equipment and on engine, heat insulation has been applied to coolant hoses, these must not be damaged and must be re-applied after installing.
-- Evacuate the refrigerant circuit. Refer to EVACUATING REFRIGERANT CIRCUIT and refer to DRAINING REFRIGERANT CIRCUIT .
-- Switch off ignition.
-- Protect driver and front passenger seats using seat covers.
-- Disconnect battery, refer to REMOVAL AND INSTALLATION .
-- Release pressure in cooling circuit by opening the cap on coolant expansion tank, refer to [For engine(s) CBRA] General Information , or refer to [For engine(s) BPY] General Information , or refer to [For engine(s) CCTA, CBFA] General Information , or refer to [For engine(s) CBEA] General Information .
-- Remove the components that hinder access to the mounting bolts for refrigerant lines -A- on expansion valve and to coolant hoses to heater core in engine compartment.
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.