What is the construction and purpose of expansion valves?

Expansion valves are air conditioning system elements most often mounted at the evaporator, between the high and low-pressure sides. A typical valve consists of a body, flow channels, connections, and a part regulating the amount of refrigerant. Their purpose is to controlledly reduce the refrigerant pressure and dose it to the evaporator in an amount appropriate for operating conditions.

What are expansion valves used for?

Expansion valves are used to regulate the flow of refrigerant so that the evaporator can effectively extract heat from the air entering the cabin. As a result, the system maintains stable cooling, and the compressor does not work under unnecessary load. Improper operation of this element can cause weak cooling, evaporator freezing, or unstable air conditioning operation.

What is the construction and function of an evaporator in an air conditioning system?

The evaporator is a heat exchanger usually placed in the blower housing, to which the refrigerant flows after passing through the expansion valve. It consists of thin channels and fins that increase the cooling surface area. Its function is to extract heat from the air directed into the vehicle interior and to drain the moisture generated during cooling.

How to select expansion valves for a specific car?

It is safest to compare the OEM part number, interchangeable numbers, and mounting method. It is also worth checking the air conditioning system version, mounting location, connection type, and compatibility with a specific evaporator. For cars with different equipment, verification by VIN is helpful.

What symptoms indicate a problem with an expansion valve?

Common symptoms include weak cabin cooling, irregular air conditioning operation, and evaporator freezing. Incorrect system pressure and increased compressor load may also occur. Such symptoms should be evaluated together with the condition of the lines, receiver drier, and refrigerant level.

What data in the offer should be paid attention to before purchase?

Information about the brand, part condition, OEM part number, interchangeable numbers, vehicle placement, and fuel type is useful if the manufacturer distinguishes equipment versions. It is good to also check photos of the connections and body, as the valve shape often depends on the body version and evaporator housing. The more accurate the data comparison, the easier it is to match the part to the car.

Expansion valves

At Global Parts, we offer a wide selection of original used car parts, including expansion valves for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our expansion valves undergo quality control to ensure you receive a top-quality product.

More information

Make

BMW 1 3 Series E81 E87 E90 E90N E91 E92 E93 LCI Aircon Heather Expansion Valve

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. A2308300184

Mercedes-Benz C E Class W203 W204 W207 W211 Heater Expansion Valve A2308300184

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9185521

BMW X3 E83 E46 MINI Cooper R55 R56 R57 R58 R59 R60 R61 EXPANSION VALVE AIR CON

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. A2208300384

Mercedes-Benz C S W203 W215 W220 Air Conditioning Expansion Valve A2208300384

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9159803

BMW 5 6 7 Series 1 F01 F02 F10 F11 F12 Aircon Heather Expansion Valve 9159803

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9159803-1

BMW F01 F02 F10 F11 F12 Aircon Heather Expansion Valve 9159803

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. A2478307800

Mercedes W177 Expansion Valve A/C Air Conditioning Valve Unit A2478307800

£28.95

Free delivery: Jul 10

If paid before 14:00

Part no. A4478350400

Mercedes W447 Expansion Valve A/C Air Conditioning Valve Unit A4478350400

£23.95

Free delivery: Jul 10

If paid before 14:00

Part no. A1648300084

Mercedes-Benz M-Class W164 Air Conditioning Expansion Valve A1648300084

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. A2468300084

Mercedes W176 W246 Air Conditioning Expansion Valve A/C A2468300084

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. 8K0820679

Audi A4 B8 S5 8T Expansion Valve Air Conditioning A/C 8K0820679

£28.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9292569

Expansion Valve BMW i3 I01 Air Conditioning Electrical Valve Heater 9292569

£37.95

Free delivery: Jul 10

If paid before 14:00

Part no. 8W0816679

Audi A4 B9 A5 F5 Expansion Valve Air Conditioning A/C 8W0816679

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9394286

BMW F30 LCI G20 G30 Hybrid Expansion Valve Air Conditioning Heather 9394286

£32.95

Free delivery: Jul 10

If paid before 14:00

Part no. 4M0820511

Audi Q7 4M Heater Box Air Condition A/C Air Con Servo Motor Unit 4M0820511

£85.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9361710

Expansion Valve BMW G11 G30 G31 Air Conditioning A/C Valve 9361710

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9187630

BMW X5 X6 Series E70 E71 F15 F16 Expansion Valve Air Conditioning Heather

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. A2128300284-1

Mercedes W212 Expansion Valve A/C Air Conditioning Valve Unit A2128300284

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. A2128300284

Mercedes W212 Expansion Valve A/C Air Conditioning Valve Unit A2128300284

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9187293

BMW 5 7 Series F01 F02 F10 F11 Flange Aircon Heather Expansion Valve 9187293

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. RHD-A2058300306

A/C Expansion Valve Mercedes W205 W213 GLC C253 Refrigerant Shut Off A2058300306

£56.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9313231

BMW F15 Air Conditioning Expansion Valve 9313231

£118.95

Free delivery: Jul 10

If paid before 14:00

Part no. 8K0820679B

Audi A4 B8 A5 S5 8T Expansion Valve Air Conditioning A/C 8K0820679B

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. 7951456

BMW G20 i4 G26 Electric Expansion Valve Air Conditioning 7951456

£23.95

Free delivery: Jul 10

If paid before 14:00

Part no. 6994989

BMW X3 G01 G20 G22 Air Conditioning Evaporator Expansion Valve 6994989

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9210754

BMW Z4 Series E89 Roadster Expansion Valve Air Conditioning Heather 9188989

£37.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9G91-19849-AA

Ford Mondeo Mk4 Glaxy Mk3 Air Conditioning Expansion Valve 9G91-19849-AA

£28.95

Free delivery: Jul 10

If paid before 14:00

Part no. 7L0820679D

Audi Q7 4L VW Touareg 7L Expansion Valve Air Conditioning A/C 7L0820679D

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 4M0820511A-2

Audi A5 F5 A6 C8 A7 4G Q5 FY Heater Box Air Condition Servo Motor 4M0820511A

£85.95

Free delivery: Jul 10

If paid before 14:00

Part no. 4G0820181A

Audi A6 C7 Expansion Valve Air Conditioning A/C Air Con 4G0820181A

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. rhd-2D2820719

Volkswagen LT 35 Expansion Valve A/C Air Conditioning Valve Unit Pipe 2D2820719

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 1K2820103-1

Audi A3 8P VW Golf Mk6 Expansion Valve A/C Air Conditioning Valve Unit 1K2820103

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. A1728350200

Mercedes SLK R172 Air Condition Conditioning Expansion Valve A1728350200

£94.95

Free delivery: Jul 13 – 20

If paid before 14:00

Part no. 7P0820679A

Volkswagen Touareg 7P A/C Air Con Air Conditioning Expansion Valve 7P0820679A

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 5Q0816679B

Volkswagen Golf CD1 Expansion Valve Air Conditioning A/C Valve 5Q0816679B

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. RHD-A2058300306-1

Mercedes W205 W213 GLC C253 A/C Shut Off Expansion Valve A2058300306

£61.95

Free delivery: Jul 10

If paid before 14:00

Part no. RHD-1K2820103B

Volkswagen Golf 1K Heater Evaporator Air Conditioning Unit 1K2820103B

£41.95

Free delivery: Jul 10

If paid before 14:00

Part no. 5Q2816103D

VW Volkswagen Golf Mk7 5G Air Compressor A/C Air Con Expansion Valve 5Q2816103D

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 7L0820679C

Audi Q7 4L Volkswagen Touareg 7L Expansion Valve Air Conditioning A/C 7L0820679C

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9292573

BMW i3 I01 Expansion Valve Air Conditioning Refrigerant Electric Heater 9292573

£23.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9316233

BMW 3 Series F30 LCI 330e Hybrid Air Con A/C Heather Expansion Valve 9316233

£37.95

Free delivery: Jul 10

If paid before 14:00

Part no. A1718300184

Expansion Valve Mercedes R171 W169 W245 Air Conditioning A/C A1718300184

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. A1688300284

Mercedes Benz A Class W168 Air Conditioning Heater Expansion Valve A1688300284

£13.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9292571

BMW i3 I01 Expansion Valve Air Conditioning Refrigerant Electric Heater 9292571

£23.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9292570

BMW i3 I01 Expansion Valve Air Conditioning Refrigerant Electric Heater 9292570

£23.95

Free delivery: Jul 10

If paid before 14:00

Part no. 5Q2820103G

Skoda Octavia 5E Air Con Heater Matrix Expansion Valve 5Q2820103G

£23.95

Free delivery: Jul 10

If paid before 14:00

Part no. 5A0F0D0

BMW G20 G30 Hybrid Expansion Valve Air Conditioning Heather 5A0F0D0

£85.95

Free delivery: Jul 10

If paid before 14:00

Part no. A2028300184

Mercedes-Benz C E Class W202 W210 Air Conditioning Expansion Valve A2028300184

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 7L0820102N

VW Volkswagen Touareg Evaporator Air Conditioning Unit 7L0820102N

£23.95

Free delivery: Jul 10

If paid before 14:00

Part no. LR016631

Range Rover Evoque L538 Expansion Valve Air Conditioning A/C 6G9N-19849-AD

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. A6398300384

Expansion Valve Mercedes Vito W639 Air Conditioning A/C Valve A6398300384

£23.95

Free delivery: Jul 10

If paid before 14:00

Part no. 7L0820679B

Audi Q7 4L Expansion Valve Air Conditioning Heather 7L0820679B

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9292567

BMW i3 I01 Electric Expansion Valve Air Conditioning A/C Heater 9292567

£18.95

Free delivery: Jul 10

If paid before 14:00

Part no. 9289832

BMW 1 3 4 Series F20 F30 F80 M3 F82 M4 Aircon Heather Expansion Valve

Product currently unavailable

Part no. 4M0820511A-1

Audi A5 F5 A6 C8 A7 4G Q5 FY Heater Box Air Condition Servo Motor 4M0820511A

Product currently unavailable

Part no. 6906268

BMW 7 SERIES E65 E66 E67 Expansion Valve Air Conditioning A/C 6906268

Product currently unavailable

Part no. rhd-6827058

Mini F55 F56 F57 Heater Air Conditioning Matrix Housing Petrol 6827058

Product currently unavailable

Part no. 4M0820511A

Audi Q5 FY Heater Box Air Condition Servo Motor 4M0820511A

Product currently unavailable

Part no. A2228301801

Expansion Valve Mercedes C118 W177 W205 Air Conditioning A/C Valve A2228301801

Product currently unavailable

Part no. 1393964

BMW 3 Series E36 Air Conditioning Heater Blower Wiring Loom Harness 1393964

Product currently unavailable

Part no. A0998300600

Expansion Valve Mercedes W205 W213 W238 A/C Air Conditioning Unit A0998300600

Product currently unavailable

Part no. rhd-A2118300562

Mercedes Benz E Class W211 Air Conditioning Heater Matrix Unit Housing Box

Product currently unavailable

Part no. 9287283

BMW I01 I12 Hybrid Air Conditioning Evaporator Expansion Valve 9287283

Product currently unavailable

Part no. Y7556003

Audi A4 B8 A5 8T A/C Expansion Valve Air Conditioning Evaporator TGK Y7556003

Product currently unavailable

Part no. 6980211

BMW 7 Series E65 E66 Expansion Valve Air Conditioning Heater 6980211

Product currently unavailable

Part no. rhd-A2208300384

Mercedes C CL S W203 W215 W220 Air Conditioning Expansion Valve A2208300384

Product currently unavailable

Part no. 7L0820679

Porsche Cayenne 9PA Air Conditioning A/C Expansion Valve Unit 7L0820679

Product currently unavailable

Part no. 1K2820103

Volkswagen Caddy Heater Evaporator Air Conditioning Unit 1K2820103

Product currently unavailable

Part no. F1F1-19849-DA

Ford Focus Mk3 A/C Air Conditioning Air Expansion Valve Unit F1F1-19849-DA

Product currently unavailable

Part no. LR036434

Range Rover L405 Air Conditioner Evaporator Expansion Valve MF447510-0270

Product currently unavailable

Part no. 5A06B45

BMW F74 Gran Coupé Air Condiotioner A/C Expansion Valve 5A06B45

Product currently unavailable

Part no. A0048304184

Mercedes Vito Viano W639 Expansion Valve A/C Air Conditioning Valve A0048304184

Product currently unavailable

Part no. EB3B-19849-CC

Ford Ranger Wildtrak Mk6 Evaporator Expansion Valve EB3B-19849-CC

Product currently unavailable

Part no. 5Q0820679C

Volkswagen Audi Seat Skoda Air Conditioning Expansion Valve 5Q0820679C

Product currently unavailable

Part no. 6827060

BMW 1 X1 X2 F39 F40 F48 Air Conditioning Air Con Heater Matrix Unit Petrol

Product currently unavailable

Part no. 4M0816679

Audi Q7 4M A/C Air Condition Interior Heater Matrix Expansion Valve 4M0816679

Product currently unavailable

Part no. A2058308400

Mercedes W205 A/C Air Conditioner Expansion Valve A2058308400

Product currently unavailable

Part no. 9291200

Expansion Valve BMW X5 F15 X6 F16 AIr Conditioning A/C Valve 9291200

Product currently unavailable

Part no. A2035050730

Mercedes-Benz W203 C 180 240 320 Radiator Duct Baffle Panel Petrol A2035050730

Product currently unavailable

Part no. A2035052230

Mercedes-Benz C-Class W203 CL203 Radiator Duct Baffle Panel Petrol A2035052230

Product currently unavailable

Part no. A2206900179

Mercedes-Benz S W220 Front Left Pillar Post Air Vent Duct N/S Grey A2206900179

Product currently unavailable

Part no. 9896405

BMW F70 F74 U06 X1 U11 Coolant Shut Off Valve Cooling Unit 9896405

Product currently unavailable

Part no. 7010973-326508

Land Rover Discovery 3 L319 Air Conditioning Expansion Valve 7010973 326508

Product currently unavailable

Part no. JQD100440

Land Rover Freelander L314 Air Conditioning Expansion Valve JQD100440

Product currently unavailable

Part no. A4538350800

Smart 453 Fortwo Air Conditioning Expansion Trigger Valve DF721002

Product currently unavailable

Part no. 6C0820679

Audi A1 8X 1.4 TFSI A/C Air Condition Expansion Valve 6C0820679

Product currently unavailable

Part no. 4M0816805B

Audi A6 C8 A7 4K Air Con Non Return Valve 4M0816805B

Product currently unavailable

Part no. A1688300661

Mercedes-Benz A-Class W168 Air Conditioning Heater Radiator A1688300661

Product currently unavailable

Part no. 8T0820679

Audi A4 B8 A5 8T Expansion Valve Air Conditioning Regulator 8T0820679

Product currently unavailable

Part no. 6G9H-19849-AD

Ford Mondeo Mk4 S-Max Air Conditioning Heater Expansion Valve 6G9H-19849-AD

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Part no. A2938301201

Mercedes H243 Expansion Valve A/C Air Conditioning Valve Unit A2938301201

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Part no. A1728350072

Expansion Valve Mercedes SLK R172 Air Conditioning A/C Valve A1728350072

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Part no. 7H0820712B

Volkswagen Transporter T5 Air Conditioning Expansion Valve 7H0820712B

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Part no. A1698201042

Mercedes-Benz A B Class W169 W245 Heater Flap Motor Actuator A1698201042

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Part no. A2118301715

Mercedes-Benz E-Class S211 Touring Line Hose Compressor Condenser A2118301715

Product currently unavailable

Part no. A1638300084

Mercedes-Benz M-Class ML W163 Air Conditioning Expansion Valve A1638300084

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Part no. 4G0816181

Audi A7 4G8 Air Condiotioner A/C Expansion Valve 5A06B45

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Part no. rhd-9155888

BMW X1 Series E84 Heater Air Conditioning Matrix Housing Diesel 9155888

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Part no. 6G91-18D487-AA

Ford Galaxy Mk2 Air Conditioning Heater Expansion Valve 6G91-18D487-AA

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Showing 1-99 of 101 products

Expansion valves for air conditioning – optimized vehicle cooling

The use of expansion valves in cars

Expansion valves are essential components of the air conditioning system that regulate the flow of refrigerant, enabling its effective expansion and cooling of the air in the vehicle cabin. The precise operation of these valves ensures the efficient performance of the entire air conditioning system and the thermal comfort of passengers. In the Global Parts automotive store, you will find a wide selection of used car parts, including expansion valves, perfectly matched to brands such as BMW, Audi, Mercedes, Volkswagen, Mini and others. An air conditioning expansion valve is a component mounted between the condenser and the evaporator, designed to precisely reduce the pressure of the refrigerant and control the amount entering the evaporator. In practice, this means stabilizing the refrigerant evaporation temperature at approximately 0–5°C, which enables effective heat extraction from the air supplied to the cabin. Expansion valves are used in both classic manual systems and automatic dual-zone air conditioning systems.

What functions do expansion valves perform?

Expansion valves play a key role in the air conditioning system:

Refrigerant flow control – Regulates the amount of refrigerant supplied to the evaporator depending on the system load.
Refrigerant pressure reduction – Expands the refrigerant, which allows for its effective cooling in the evaporator.
Improvement of air conditioning efficiency – Thanks to precise flow regulation, the valves ensure optimal operation of the entire system.
Protection of system components – They enable uniform system operation, reducing the risk of overloads and damage to other elements. Depending on the vehicle design, mechanical expansion valves or solutions controlled indirectly by temperature and pressure sensors are used. For example, the BMW E60 air conditioning expansion valve and the Audi A4 B5 air conditioning expansion valve differ in body construction, channel diameter, and mounting method, even though they perform an identical function in the refrigerant circuit. Proper compatibility of the valve with the evaporator, compressor, and air conditioning lines is crucial for the stable operation of the entire system.

Construction and purpose of expansion valves

Expansion valves are metering elements usually mounted at the evaporator inlet, where the refrigerant transitions from the high-pressure side to the low-pressure side of the system. A typical assembly consists of a body, flow channels, connection ports, and an element regulating the refrigerant dose. Their task is to maintain proper evaporation conditions and stable operation of the entire air conditioning system, regardless of the system load.

Comparison of expansion valve variants

Variant	System type	Construction	What to check before purchase
Mechanical TXV	Manual air conditioning	Body with channels and a regulating element reacting to operating conditions	OEM number, port spacing, mounting type, compatibility with the evaporator
Block valve	Automatic air conditioning	Compact form mounted directly at the lines or evaporator	Port layout, seals, pre-facelift/post-facelift version, mounting location
Version for multi-zone systems	Advanced HVAC systems	Design matched to a specific evaporator housing and temperature control	OEM part number, interchangeable numbers, refrigerant type, vehicle equipment

Collaborating elements in the air conditioning system

The evaporator is a heat exchanger where the refrigerant, after expansion, absorbs energy from the air directed into the car interior. The expansion valve is used to supply the correct amount of refrigerant to it, so both elements must be compatible in terms of flow and connection method. In practice, selection should be analyzed together with parts such as air conditioning compressors and clutches, air conditioning lines, hoses, and connectors, and pressure switches.

Why is it worth taking care of expansion valves?

A faulty expansion valve can reduce air conditioning efficiency and affect driving comfort. Typical symptoms of failure include:

Lack of cooling – The air conditioning does not cool the air in the cabin, despite the compressor working correctly.
Evaporator freezing – An excessive amount of refrigerant in the evaporator can cause it to freeze.
Irregular air conditioning operation – The system operates unstably, which affects user comfort.
Increased fuel consumption – An inefficient valve can increase the load on the compressor, leading to higher fuel consumption. If replacement is necessary, at Global Parts you will find suitable used car parts that will restore the full functionality of your air conditioning system.

Selection of expansion valves for vehicle versions

The selection of a valve should consider the OEM part number, interchangeable numbers, vehicle placement, and fuel type, if the manufacturer distinguishes equipment variants between engine versions. When choosing an element like Mercedes W203 air conditioning valves, it is worth comparing the connection layout, mounting method, and compatibility with the evaporator housing. It is also good practice to check whether evaporators or receiver driers and accumulators with the same system standard work with it in a given configuration.

How to choose the right expansion valves?

When choosing expansion valves, several key aspects should be considered:

Matching the vehicle model – Every air conditioning system has its specific technical requirements. In the Global Parts automotive store, you will find expansion valves perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini and others.
Technical condition – Used valves should be fully functional, free from mechanical damage and corrosion.
System type – Ensure that the selected valve is compatible with your vehicle's air conditioning system.

Why is it worth choosing used expansion valves?

Used car parts, such as used expansion valves, are an economical solution that allows for savings while maintaining high quality. By choosing used air conditioning system elements, you gain:

Lower costs – Used valves are significantly cheaper than new ones but offer equally high quality.
Ecology – Recycling parts supports environmental protection and reduces waste.
Wide offer – In our store, you will find used expansion valves for the most popular car brands.

How to maintain expansion valves?

To ensure expansion valves work reliably for a long time, it is worth following a few rules:

Regular inspection – Check the condition of the valve during air conditioning system maintenance.
Keep the system clean – Contaminants can disrupt valve operation and reduce air conditioning efficiency.
Air conditioning servicing – Regular inspections and refrigerant refilling support the proper operation of the system.
Replace on time – Damaged valves should be replaced to avoid air conditioning performance issues. Regular air conditioning system maintenance reduces the risk of valve channel contamination with filings and moisture. After any interference with the circuit, it is worth verifying the tightness of connections, the condition of seals, and the compatibility of the part with the OEM number and vehicle equipment.

FAQ

Question	Answer
What is the construction and purpose of expansion valves?	Expansion valves are air conditioning system elements most often mounted at the evaporator, between the high and low-pressure sides. A typical valve consists of a body, flow channels, connections, and a part regulating the amount of refrigerant. Their purpose is to controlledly reduce the refrigerant pressure and dose it to the evaporator in an amount appropriate for operating conditions.
What are expansion valves used for?	Expansion valves are used to regulate the flow of refrigerant so that the evaporator can effectively extract heat from the air entering the cabin. As a result, the system maintains stable cooling, and the compressor does not work under unnecessary load. Improper operation of this element can cause weak cooling, evaporator freezing, or unstable air conditioning operation.
What is the construction and function of an evaporator in an air conditioning system?	The evaporator is a heat exchanger usually placed in the blower housing, to which the refrigerant flows after passing through the expansion valve. It consists of thin channels and fins that increase the cooling surface area. Its function is to extract heat from the air directed into the vehicle interior and to drain the moisture generated during cooling.
How to select expansion valves for a specific car?	It is safest to compare the OEM part number, interchangeable numbers, and mounting method. It is also worth checking the air conditioning system version, mounting location, connection type, and compatibility with a specific evaporator. For cars with different equipment, verification by VIN is helpful.
What symptoms indicate a problem with an expansion valve?	Common symptoms include weak cabin cooling, irregular air conditioning operation, and evaporator freezing. Incorrect system pressure and increased compressor load may also occur. Such symptoms should be evaluated together with the condition of the lines, receiver drier, and refrigerant level.
What data in the offer should be paid attention to before purchase?	Information about the brand, part condition, OEM part number, interchangeable numbers, vehicle placement, and fuel type is useful if the manufacturer distinguishes equipment versions. It is good to also check photos of the connections and body, as the valve shape often depends on the body version and evaporator housing. The more accurate the data comparison, the easier it is to match the part to the car.

Summary: expansion valves in the Global Parts automotive store

Expansion valves are essential air conditioning system elements that ensure effective cooling and comfort in the vehicle cabin. The Global Parts offer includes solutions matched to many car configurations and brands such as Unbranded, Mercedes, BMW, and others. When choosing, it is worth comparing the OEM number, body construction, connection layout, and compatibility with other air conditioning system elements to maintain proper system efficiency. We invite you to contact us – we are here to help you! For more information and interesting facts, we also invite you to visit our automotive blog.

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