64 51 520 Removing and installing/replacing expansion valve (N20, N57)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 9 030

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

Handling R 134a tetrafluorethane refrigerant . See 64 50... NOTE FOR HANDLING R134A REFRIGERANT or 64 50... SAFETY INFORMATIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A
HANDLING REFRIGERANT FLUID

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.

NOTE: If air conditioning system is opened for more than 24 hours:

Replace DESICCANT INSERT FOR AIR CONDITIONING .

Necessary preliminary work:

DRAIN OFF AIR CONDITIONING SYSTEM
Remove acoustic cover

Release screws (1).

Tightening torque 64 53 11AZ .

Detach refrigerant lines (2) from expansion valve (3).

Installation note:

Replace sealing rings.

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

Fig 1: Identifying Refrigerant Lines From Expansion Valve And Screws

G09950015

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 64 53 10AZ .

Remove expansion valve (2) from retaining clip.

Fig 2: Identifying Expansion Valve And Screws

G04727879

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Place expansion valve (1) exactly on refrigerant lines (2) and (3).

Fit screws of expansion valve (1) and make sure retaining clip (4) is correctly positioned.

Fig 3: Identifying Expansion Valve, Refrigerant Lines And Retainer

G04727880

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

EVACUATE AND FILL AIR CONDITIONING SYSTEM