64 52 521 Replacing A/C system compressor (N52K)

WARNING: This page is about a different car, the 2010 BMW X3, 2009 BMW X3, 2008 BMW X3, and 2007 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

32 1 270 (Plug)

WARNING: Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling R134a refrigerant, see 64 50 ... Safety instructions for handling refrigerant R134a .
Follow safety instructions for handling refrigerant oil, see 64 50 ... Instructions for handling refrigerant oil (for refrigerant R 134a) .

IMPORTANT: Risk of damage! Restart engine only when A/C system has been correctly filled. Read and comply with notes on replacing compressor. Follow instructions for opening and replacing parts in refrigerant circuit. If A/C system is opened for more than 24 hours: Replace desiccant insert for A/C system.

Necessary preliminary tasks:

Evacuate and fill A/C system, see 64 50 009 Drawing off, evacuating and filling A/C system (R 134a) . are not included in the time value given for this work operation
Remove A/C compressor drive belt
Remove coolant thermostat. See 11 53 000 REMOVING AND INSTALLING/REPLACING COOLANT THERMOSTAT (N52K) .

Release screws (1) and disconnect plug connection on compressor. Disconnect pressure and suction lines. Installation: Replace all sealing rings and moisten with refrigerant oil. Tightening torque, see 64 52 1AZ in 64 52 A/C COMPRESSOR .

Fig 1: Release Screws (1) And Disconnect Plug Connection On Compressor

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Seal openings or lines on compressor with special tool 32 1 270 to prevent escape of media and fouling.

NOTE: Secure compressor (3) against falling out. Release screw (1). Release screws (2) and feed out compressor towards front. Tightening torque, see 64 52 3AZ in 64 52 A/C COMPRESSOR .

Fig 2: Release Screws (2) And Feed Out Compressor Towards Front

Courtesy of BMW OF NORTH AMERICA, INC.

After installation: Fill and vent cooling system. Evacuate and fill A/C system.