64 53 521 Replacing safety pressure switch (N63): Notes

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

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

IMPORTANT: Risk of damage!
Restart engine only when air conditioning system has been correctly filled.
Follow INSTRUCTIONS for opening and replacing parts in refrigerant circuit.
Replace desiccant insert. See REPLACING DESICCANT INSERT FOR AIR CONDITIONING SYSTEM or REPLACING DESICCANT INSERT FOR A/C SYSTEM (CAPACITOR REMOVED) .

Necessary preliminary tasks:

Release screws (1).

Tightening torque 12 90 2AZ .

Remove electronics box cover (2).

Fig 1: Identifying Electronics Box Cover And Screws

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Unclip and unplug all connectors (1) from control units.

Unclip grommet hold-down device (2) and remove.

Detach rubber grommets (3) from electronics box.

Place wiring harnesses to the side.

Installation note:

Make sure grommets are is correctly seated (watertightness).

Fig 2: Identifying Rubber Grommets, Connectors And Grommet Hold-Down Device

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Release screw (1).

Remove lead (2) from connecting piece.

Fig 3: Identifying Connecting Piece Lead And Screw

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Unfasten plug connection (1) and disconnect.

Release safety pressure switch (2).

Tightening torque 64 53 8AZ .

Fig 4: Identifying Safety Pressure Switch And Plug Connection

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