64 53 521 Replace safety pressure switch (N52T, N54, N55, B47)

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WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant fluid.
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.
Follow notes for OPENING AND REPLACING PARTS in refrigerant circuit.
If air conditioning system is opened for more than 24 hours: Replace desiccant insert for air conditioning. See REPLACING DESICCANT INSERT or REPLACING DESICCANT INSERT (CAPACITOR REMOVED) .

Necessary preliminary tasks:

DRAIN OFF AIR CONDITIONING SYSTEM

Release screws (1) and (2).

Remove heat shield (3).

Fig 1: Identifying Heat Shield And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Release safety pressure switch (2).

Tightening torque 64 53 8AZ .

Fig 2: Identifying Plug Connection And Pressure Switch

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

EVACUATE AND FILL A/C SYSTEM