64 51 525 Removing and installing/replacing expansion valve (automatic A/C High)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 BMW 745i, 2005 BMW 745Li, 2004 BMW 745i, 2004 BMW 745Li, and 2003 BMW 745i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling refrigerant R 134a. Refer to 64 50 ... SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A .
Follow safety instructions for handling refrigerant oil. Refer to 64 50 ... SAFETY PRECAUTIONS WHEN HANDLING REFRIGERANT OIL (FOR REFRIGERANT R 134A) .

IMPORTANT: Risk of damage!
Restart engine only when A/C system has been correctly filled.

NOTE: If A/C system is opened for more than 24 hours: Replacing drier insert for A/C system. Refer to 64 53 517 REPLACING DESICCANT INSERT FOR A / C SYSTEM (AUTOMATIC A / C HIGH) .

Necessary preliminary tasks:

Draw off refrigerant from A/C system, refer to 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A)
Remove trim panel for pedal assembly. Refer to 51 45 185 REMOVING AND INSTALLING/REPLACING TRIM FOR PEDAL ASSEMBLY .

After installation:

Evacuate and fill A/C system. Refer to 51 45 185 REMOVING AND INSTALLING/REPLACING TRIM FOR PEDAL ASSEMBLY .

Release screw (1).

Fig 1: Removing Left Footwell Air Duct

G03291134

Courtesy of BMW OF NORTH AMERICA, INC.

Remove left footwell air duct (2) in direction of arrow.

Installation:

Make sure left footwell air duct (2) is correctly seated.

Release screws (1).

Fig 2: Removing Expansion Valve Cover

G03291135

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, unclip plug connection.

Remove expansion valve cover (2) in direction of arrow.

Installation:

Retaining hooks (1) must engage fully in mounts (2).

Fig 3: Identifying Retaining Hooks

G03291136

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Fig 4: Detaching Refrigerant Lines

G03291137

Courtesy of BMW OF NORTH AMERICA, INC.

Detach refrigerant lines (2) in direction of arrow.

Remove plate (3).

Release screws (1).

Fig 5: Detaching Refrigerant Lines

G03291138

Courtesy of BMW OF NORTH AMERICA, INC.

Detach refrigerant lines (2) in direction of arrow.

Remove plate (3).

Remove expansion valve.

Installation:

Replace all sealing rings (1).

Fig 6: Replacing Sealing Rings

G03291139

Courtesy of BMW OF NORTH AMERICA, INC.