64 52 523 Replacing air conditioning system compressor (N57)

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Special tools required:

WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.
Read and comply with safety instructions:

Observe SAFETY INFORMATION for handling refrigerant and refrigerant oil.

IMPORTANT: Risk of damage!
Restart engine only when A/C system has been correctly filled.
Read and comply with notes on compressor replacement. See NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR NOT KNOWN) -or- NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR KNOWN) .

Follow notes for OPENING AND REPLACING PARTS in refrigerant circuit.

If Air conditioning is opened for more than 24 h:

Replace DESICCANT INSERT for air conditioning system.

Necessary preliminary work:

DRAIN OFF AIR CONDITIONING SYSTEM
With N57 engine:
Remove ALTERNATOR
Remove PRESSURE PIPE
With N57T and N57Z engine:
Remove INTAKE PORT
Remove DRIVE BELT FOR ALTERNATOR

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

Release screws (1).

Tightening torque 64 52 1AZ .

Unfasten plug connection (2) and disconnect.

Remove pressure and intake pipes (3).

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.

Fig 1: Identifying Plug Connection, Screws And Intake Pipes

Courtesy of BMW OF NORTH AMERICA, INC.

N57 only:

NOTE: Secure compressor against falling out.

Release screws (1).

Tightening torque 64 52 3AZ .

Lift out compressor (2).

Fig 2: Identifying Compressor And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

N57T/N57Z only:

NOTE: Secure compressor against falling out.

Release screws (2) on compressor (1).

Tightening torque 64 52 3AZ .

Feed out compressor (1) in direction of arrow.

Fig 3: Removing Compressor

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement:

Adjust the amount of refrigerant oil in the new compressor. See NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR NOT KNOWN) -or- NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR KNOWN) .

IMPORTANT: Danger of compressor damage!
Danger of customer complaints due to reduced cooling power of the Air conditioning!
Before the installation of the new compressor, it is absolutely necessary to adjust the amount of refrigerant oil in the new compressor!
The notes on refrigerant oil must be observed! See NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR NOT KNOWN) -or- NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR KNOWN) .

After installation:

EVACUATE AND FILL A/C SYSTEM