Four Seasons 39647 A/C Expansion Valve

Four Seasons 39647 Expansion Valve Overview

Four Seasons 39647 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and sealing-washer connections. It is an OE-style replacement that meets or exceeds OEM requirements and is specified for BMW, Mercedes-Benz, and Toyota applications across 2018-2025 model years.

Use this Four Seasons Expansion Valve line when servicing BMW 330i, M340i, M4, X3, Z4, Mercedes-Benz CLA250, GLA250, GLB250, EQB models, or Toyota GR Supra HVAC systems. Part number 39647 is also referenced in aftermarket catalogs for the same application.

Key Features

• Part number: 39647
• Four Seasons Expansion Valve product line
• Block-type A/C expansion valve
• Aluminum construction
• R134A refrigerant type
• Female suction and liquid fittings with sealing washers
• No. 12 suction inlet and outlet thread diameter
• No. 6 liquid inlet thread diameter
• No. 8 liquid outlet thread diameter
• 2 mounting holes
• Style without solenoid
• Super heat setting: -7.000
• Meets or exceeds OEM specifications

Product Details

The Four Seasons Expansion Valve line is built for precise refrigerant metering in modern automotive air conditioning systems. This block-type design helps regulate refrigerant flow into the evaporator, supporting stable cabin cooling performance in vehicles that use R134A refrigerant. The aluminum housing and sealing-washer fittings are suited to service work where OE-style fit and connection geometry matter.

Compatible With BMW 230i, 330i, 430i, M240i, M340i, M4, M440i, X3, X4, Z4, and M2 applications; Mercedes-Benz CLA250, CLA35 AMG, CLA45 AMG, A220, A35 AMG, GLA250, GLA35 AMG, GLA45 AMG, GLB250, GLB35 AMG, EQB 250+, EQB 300, EQB 350, and CLA45 AMG S applications; and Toyota GR Supra applications. This part cross-references UAC EX10717C for the same application.

What This Part Helps Address

• Weak or inconsistent A/C cooling output
• Incorrect refrigerant flow through the evaporator circuit
• Expansion valve restriction or internal wear
• Temperature control issues in R134A HVAC systems
• Service replacement needs on OE-style block valve setups

Installation Notes and Tips

Verify refrigerant type, fitting style, and mounting-hole layout before installation. This valve uses female suction and liquid connections with sealing washers, so clean sealing surfaces and correct torque are important for leak prevention. Confirm the vehicle’s HVAC system calls for a block-type expansion valve and match the application to the exact BMW, Mercedes-Benz, or Toyota model listed for 2018-2025 coverage.

Quality Assurance

Four Seasons 39647 is manufactured to meet or exceed OEM specifications for the listed applications. The Four Seasons Expansion Valve line is intended for direct replacement service in vehicles requiring an OE-style R134A block expansion valve.