64 53 520 Replacing Safety Pressure Switch

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

Risk of injury!

Refrigerant circuit is under high pressure!

Handling R134a refrigerant: see SAFETY INSTRUCTIONS and INSTRUCTIONS FOR HANDLING .

Avoid contact with refrigerant and refrigerant oil.

Handling refrigerant oil: see safety instructions for HANDLING REFRIGERANT OIL (FOR REFRIGERANT R134A) .

IMPORTANT:

Risk of damage!

Restart engine only when A/C system has been correctly filled.

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:

Drain off refrigerant from A/C system. See DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R134A) .

Release screws (1) and bent heat insulation (2) to one side slightly.

Fig 1: Identifying Screws & Bent Heat Insulation

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1) and release safety pressure switch (2).

Tightening torque 64 53 14AZ

Fig 2: Identifying Safety Pressure Switch & Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Evacuate and fill A/C system. Refer to DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R134A) .