Four Seasons 39588 A/C Expansion Valve

Overview of Four Seasons Expansion Valve 39588

The Four Seasons Expansion Valve 39588 is engineered for precise control of refrigerant flow in automotive air conditioning systems. Designed specifically for BMW X3 and X4 models, this aluminum block-type valve ensures efficient cooling performance with R134a refrigerant compatibility.

• Constructed from durable aluminum material
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with insert o-ring seals
• Meets or exceeds OEM specifications for reliable fit and function

Detailed Product Features and Specifications

This A/C expansion valve from Four Seasons features a block-type design made from aluminum, providing corrosion resistance and lightweight durability. It includes two mounting holes to ensure a stable fit within the HVAC system. The valve is designed for use with R134a refrigerant, the standard for many modern vehicles including BMW models. Both suction inlet and outlet fittings are female with No. 12 thread diameter, while liquid inlet and outlet fittings are female with No. 6 and No. 10 thread diameters respectively. All fittings utilize insert o-ring styles to maintain a secure, leak-free connection. The liquid inlet size measures 0.540 inches (13.8 mm), and the liquid outlet size is 0.6 inches (15.3 mm). This part number 39588 is engineered to meet or exceed OEM requirements, ensuring compatibility and performance for BMW X3 and X4 vehicles.

About the Four Seasons Expansion Valve Product Line

The Four Seasons Expansion Valve product line focuses on delivering reliable A/C flow restrictors designed to regulate refrigerant flow accurately within automotive HVAC systems. This line emphasizes OEM-level fitment and material quality, such as aluminum construction and precise fitting specifications, to maintain system efficiency and durability. The 39588 valve is part of this line, providing a direct replacement solution for BMW X3 and X4 models requiring R134a refrigerant systems.

Common Applications and Problem Resolution

• Restores proper refrigerant flow in BMW X3 and X4 A/C systems
• Resolves inconsistent cabin cooling or fluctuating temperatures
• Eliminates refrigerant leaks caused by worn or damaged expansion valves
• Prevents compressor damage due to improper refrigerant metering
• Addresses system pressure imbalances affecting overall HVAC performance

Installation Notes and Tips

When installing the Four Seasons Expansion Valve 39588, ensure the vehicle’s A/C system is fully evacuated and free of contaminants. Use proper tools to avoid damaging the female insert o-ring fittings. Verify that the mounting holes align correctly with the HVAC housing for secure attachment. Replace any associated O-rings with the included green O-rings ([24608] and [24628]) to maintain a leak-free seal. After installation, perform a system pressure test and recharge with R134a refrigerant according to manufacturer specifications.

Quality Assurance and Warranty

This expansion valve meets or exceeds OEM standards for fit, form, and function, providing dependable performance in BMW X3 and X4 vehicles. Four Seasons backs this part with quality assurance to ensure long-term reliability. Please refer to Four Seasons’ warranty policy for specific coverage details.