Four Seasons 39585 A/C Expansion Valve - Rear

Rear A/C Expansion Valve for Infiniti and Nissan

Four Seasons 39585 is a block-type A/C expansion valve for R134A systems with a solenoid and aluminum construction. It is built for rear HVAC service on select Infiniti and Nissan vehicles, including the Infiniti QX80, Nissan Armada, and Infiniti QX56.

Key Features

• Block-type A/C expansion valve for rear HVAC applications
• Aluminum body and aluminum finish
• Configured for R134A refrigerant systems
• Solenoid-equipped design
• Meets or exceeds OEM specifications
• Rear-position fitment for select Infiniti and Nissan models
• Four Seasons part number 39585

Product Details

Four Seasons Expansion Valve 39585 is an OE-style HVAC flow restrictor that meters refrigerant into the rear evaporator circuit. The valve uses female O-ring connections with No. 12 suction inlet and outlet fittings, plus No. 6 liquid inlet and No. 8 liquid outlet fittings. Its aluminum construction and block-type layout support direct replacement service in rear air conditioning systems on 2011-2013 Infiniti QX56, 2014-2018 Infiniti QX80, and 2017 Nissan Armada applications. If you are replacing a rear A/C expansion valve on an Infiniti QX80 or Nissan Armada, this part number 39585 is a direct match for the listed vehicles.

This part cross-references UAC EX10622C for the same application.

Common Problems This Part Can Address

• Rear A/C vent air that is not cooling properly
• Erratic refrigerant metering at the rear evaporator
• Restricted or uneven refrigerant flow in the HVAC circuit
• System performance issues tied to a worn expansion valve
• Rear climate control complaints on Infiniti QX56, QX80, or Nissan Armada models

Installation Notes and Tips

Verify the vehicle uses the rear HVAC configuration shown in the fitment data before ordering. Inspect the O-ring sealing surfaces, replace damaged seals as needed, and confirm the liquid and suction line sizes match the original valve. Proper evacuation and recharge procedures are required after installation to restore correct system operation. For rear A/C service on the Infiniti QX80, Nissan Armada, or Infiniti QX56, confirm the replacement valve matches the original block-style layout and refrigerant type.

Quality Assurance

Four Seasons 39585 is listed as meeting or exceeding OEM requirements for the specified applications. The part is designed for service in R134A rear HVAC systems and follows the fitment and connection details shown above.