64 52 521 Replacing air conditioning compressor (N54, N55)

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:

00 9 030 (Wedge)
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 left charge air duct

Release screws (1) and (2). Remove refrigerant line. Tightening torque 64 52 1AZ. Installation note: Replace sealing rings. Use special tool 00 9 030 to mount sealing rings without damaging them.

Fig 1: Release Screws (1) And (2)

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 dirt contamination.

IMPORTANT: Secure compressor against falling.

Disconnect plug connection (1). Unfasten screws (2). Release screw (3) and feed out compressor in upward direction. Tightening torque 64 52 3AZ.

Fig 2: Release Screw (3) And Feed Out Compressor In Upward Direction

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement: Read and comply with notes on compressor replacement. If necessary, release screws (1) and modify holder (2).

Fig 3: Release Screws (1) And Modify Holder (2)

Courtesy of BMW OF NORTH AMERICA, INC.

After installation: Evacuate and fill air conditioning system . Assemble engine.