Four Seasons 38630 A/C Expansion Valve

BMW A/C Expansion Valve for R134A Systems

Restore proper refrigerant control with the Four Seasons Expansion Valve, Part Number 38630. This block-type A/C expansion valve is built from aluminum and is specified for R134A systems, making it a direct-fit service part for a wide range of BMW applications, including 7 Series, 8 Series, 3 Series, and Z3 models.

Four Seasons Expansion Valve 38630 is an OE-style replacement that meets or exceeds OEM requirements and is built for Nippondenso-equipped BMW HVAC systems where precise refrigerant metering is critical.

• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Female FIO suction and liquid connections with insert O-ring sealing
• 2 mounting holes for secure installation
• Super heat setting: 5.400
• Meets or exceeds OEM specifications
• Compatible with BMW 740i, 740iL, 750iL, 318i, 328i, M3, and Z3 applications

Detailed Product Overview

This Four Seasons Expansion Valve is designed to regulate refrigerant flow into the evaporator, helping maintain stable cabin cooling performance across supported BMW models. The valve uses female inlet and outlet fittings with No. 10 and No. 12 suction thread diameters, plus No. 6 and No. 8 liquid thread diameters, along with insert O-ring style connections for proper sealing. Part number 38630 is a practical replacement choice for BMW A/C repair work where accurate refrigerant control and OEM-style fitment matter.

This part cross-references UAC (e.g., EX10147C) for the same application.

What This Part Helps Address

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• A/C performance issues caused by a worn expansion valve
• Temperature fluctuations in BMW HVAC systems
• Service replacement for Nippondenso-based A/C setups

Installation Notes and Tips

Verify refrigerant type, connection style, and vehicle-specific HVAC configuration before installation. This valve is for R134A systems and uses insert O-ring fittings, so the sealing surfaces and O-rings should be inspected carefully during service. Confirm the application by model year and system layout for BMW 740i, 740iL, 750iL, 318i, 328i, M3, and Z3 vehicles before final assembly.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements, supporting dependable replacement quality for BMW A/C service. Part Number 38630 is engineered for accurate fitment and refrigerant control in supported applications.