64 52 ... Notes/instructions on working on air-conditioning systems

WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Avoid contact with refrigerant and refrigerant oil. Follow safety instructions for handling refrigerant R 134a, refer to 64 50 ... SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A . Follow safety instructions for handling refrigerant oil refer to 64 50 ... SAFETY PRECAUTIONS WHEN HANDLING REFRIGERANT OIL (FOR REFRIGERANT R 134A) . Scalding hazard! Work on the cooling system may only be carried out when it has cooled down.

IMPORTANT: Risk of damage! Restart engine only when A/C system has been correctly filled. Read and comply with notes on replacing compressor, refer to 64 52 ... INSTRUCTIONS FOR COMPRESSOR REPLACEMENT .

NOTE: If A/C system is opened for more than 24 hours: Replace desiccant insert for A/C system, refer to 64 53 517 REPLACING DESICCANT INSERT FOR A/C SYSTEM .

IMPORTANT: N52 Engine Only: Aluminium-Magnesium Materials . No steel screws/bolts may be used due to the threat of electrochemical corrosion. A magnesium crankcase requires aluminum screws/bolts exclusively. Aluminum screws/bolts must be replaced each time they are released . The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification. Jointing torque and angle of rotation must be observed without fail (risk of damage).