Four Seasons 39031 A/C Expansion Valve - Rear

Four Seasons 39031 A/C Expansion Valve

The Four Seasons 39031 expansion valve is a TXV-style A/C flow restrictor built for R134A systems and finished in brass. It is used to regulate refrigerant flow through the evaporator circuit, helping maintain proper cooling performance in the HVAC system.

Compatible With rear A/C service on select Honda Odyssey and Toyota Sequoia applications, plus rear Toyota Sienna coverage and a 2004 Toyota Corolla application. This Four Seasons Expansion Valve line is focused on direct-fit HVAC service parts for vehicle-specific A/C repairs.

Key Features

• Brand: Four Seasons
• Part number: 39031
• Type: TXV expansion valve
• Refrigerant type: R134A
• Color/material finish: Brass
• Category: HVAC A/C flow restrictor

Product Details

The Four Seasons 39031 is an A/C expansion valve that meters refrigerant entering the evaporator so the system can maintain the correct pressure drop and cooling balance. It is specified for rear HVAC applications on 2005-2006 Honda Odyssey, 2009-2010 Honda Odyssey, 2001-2008 Toyota Sequoia, 2004-2006 Toyota Sienna, 2007 Toyota Sienna to 12/06, and 2004 Toyota Corolla from 5/04. Cross-reference part numbers include UAC EX10234C and Pioneer Automotive Industries 759031 for the same application.

Common Issues This Part Addresses

• Weak rear A/C cooling caused by incorrect refrigerant metering
• Uneven evaporator performance in the HVAC system
• Restricted refrigerant flow at the expansion valve
• Temperature control problems in rear climate circuits
• Service replacement for a worn or malfunctioning TXV

Installation Notes and Tips

• Verify the vehicle year, model, and rear-position application before installation.
• Inspect the A/C system for contamination, leaks, and moisture before replacing the valve.
• Replace the valve only after the system has been properly evacuated and serviced by an A/C professional.
• Confirm R134A refrigerant system requirements and follow OEM service procedures.

Quality Assurance

Four Seasons HVAC components are cataloged for vehicle-specific service applications and are identified by direct interchange references for parts matching. Use the confirmed fitment list to select the correct rear A/C expansion valve for your Honda Odyssey, Toyota Sequoia, Toyota Sienna, or Toyota Corolla application.