A/C Expansion Valves

Genuine OEM A/C Expansion Valves for European Cars

The expansion valve meters refrigerant into the evaporator, dropping it from high pressure to low and controlling the flow that produces the cooling effect. It is a small, inexpensive component that governs how the entire system behaves — and it is the part most often left in place during a repair that then fails again because of it.

We supply genuine OEM expansion valves and orifice tubes across every marque we serve, matched to vehicle build and refrigerant type. Send us your VIN and we will confirm before you order.

Replace It Whenever the System Is Open

This is the single most important point on the page. If a compressor has failed internally, the expansion valve is contaminated. Metal debris from a broken-down compressor circulates through the system and lodges in the valve, because the valve is the narrowest restriction in the circuit. Fitting a new compressor while leaving the old valve in place is the most common cause of a repeat compressor failure — the restriction starves the new compressor and it dies the same way.

The valve, the receiver-drier and a full system flush are not optional extras in that scenario. They are what makes the compressor replacement last.

Symptoms of a Failing Expansion Valve

Cooling that is inconsistent rather than absent — cold at some times, warm at others, often varying with engine speed or load. A stuck valve produces this pattern where a failed compressor produces steady warm air.

Frost or icing on the evaporator or the low-pressure line — a valve stuck open floods the evaporator, and the excess liquid refrigerant freezes. Airflow then drops as the core ices over.

Cooling that fades after ten or fifteen minutes and returns after the system is switched off for a while — characteristic of moisture in the system freezing at the valve orifice, which points to a saturated receiver-drier alongside the valve.

Pressure readings that are wrong in both directions — high side low and low side high, or the reverse. A gauge set tells you more about a suspected valve than any symptom does.

What to Know Before Ordering

• Refrigerant type is not interchangeable. Older cars use R134a, newer ones R1234yf, and valves are calibrated to the refrigerant they meter.
• Thermal expansion valves and orifice tubes are different designs. Confirm which your system uses before ordering.
• Replace the O-rings with the valve. They are single-use and are the items most often missing when a job stalls halfway.
• The system must be evacuated and recharged to specification afterwards, with the correct oil type and quantity.
• On many platforms the valve sits at the evaporator, behind the dashboard — which is the strongest possible argument for replacing it during any evaporator work rather than separately.

A/C Expansion Valves by Brand

BMW · Mercedes-Benz · Audi · Porsche · Land Rover · Bentley · Rolls-Royce · Maserati · All brands →

Related Categories

All A/C & heating parts → · A/C compressors → · A/C evaporators → · Blower motors → · Radiators & condensers → · Cabin & air filters →

Why Buy Expansion Valves at EuroParts360?

• Genuine and OEM sourced — correct flow calibration for the system and refrigerant
• Refrigerant-aware — R134a and R1234yf valves identified correctly
• Supplied with O-rings — the single-use items most often missing mid-job
• Stocked alongside compressors and driers — so the full repair goes out together
• Fast global dispatch — from our US, UK, UAE and Hong Kong warehouses, free shipping across the UAE and USA
• Warranty-backed — every part covered under our standard warranty policy

FAQ

Do I really need a new expansion valve with a compressor? If the old compressor failed internally, yes — without exception. Debris lodges in the valve because it is the narrowest point in the system, and the resulting restriction is the most common reason a replacement compressor fails again within weeks.

My cooling is inconsistent rather than absent. That pattern points to the expansion valve rather than the compressor, which tends to produce steady warm air when it fails.

There is ice forming on the A/C lines. A valve stuck open floods the evaporator with liquid refrigerant, which then freezes. Airflow drops as the core ices over.

Cooling works for fifteen minutes then fades. Characteristically moisture freezing at the valve orifice — which means the receiver-drier is saturated and should be replaced alongside the valve.

How quickly will my order ship? In-stock orders dispatch from our UAE or USA warehouse with full tracking. For assistance, contact us on +1 818-851-0770, WhatsApp +971 568 908 800, or info@europarts360.com.