Four Seasons
Expansion Valve

Four Seasons 39667 A/C Expansion Valve - Rear

Brand Four Seasons 39667
Position Rear
Description Expansion Valves
Liquid Inlet Fitting Gender Female
Liquid Inlet Fitting Thread Diameter No. 6
Liquid Inlet Style Sealing Washer
Liquid Outlet Fitting Gender Female
Liquid Outlet Fitting Thread Diameter No. 8
Liquid Outlet Style Sealing Washer
Material Aluminum
Meets / Exceeds OEM? Yes
Mounting Hole Quantity 2
Refrigerant Type R134A
Style w/ Solenoid
Suction Inlet Fitting Gender Female
Suction Inlet Fitting Thread Diameter No. 12
Suction Inlet Style Sealing Washer
Suction Outlet Fitting Gender Female
Suction Outlet Fitting Thread Diameter No. 12
Suction Outlet Style Sealing Washer
Super Heat -0.8
Switch Included? Not Included
Tonnage 1.5
Type Block Type
Product line Expansion Valve
Fits Land Rover · 4 vehicles

OE direct replacement. Meets or exceeds OEM requirements for dependable service.

Aluminum block type. Lightweight construction with sealing-washer fittings.

With solenoid. Built as an expansion valve for precise refrigerant flow.

Cross-references Four Seasons 39667, 759888 and A99551 for the same application. See all 4.

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Four Seasons 39667 Rear A/C Expansion Valve

The Four Seasons Expansion Valve, part number 39667, is a block-type A/C expansion valve built for R134A systems. It is a rear HVAC flow restrictor for the 2020-2023 Land Rover Defender 110 and uses an aluminum body with sealing-washer connections for a direct OE-style service replacement.

Key Features

  • Brand: Four Seasons Expansion Valve
  • Part number: 39667
  • Block-type A/C expansion valve for R134A refrigerant
  • Aluminum construction for HVAC service applications
  • Female suction and liquid fittings with sealing washers
  • Suction inlet/outlet thread diameter: No. 12
  • Liquid inlet thread diameter: No. 6; liquid outlet thread diameter: No. 8
  • Mounting hole quantity: 2
  • Style: w/ solenoid
  • Meets or exceeds OEM requirements
  • Rear fitment for 2020-2023 Land Rover Defender 110

Product Details

Four Seasons 39667 is an A/C expansion valve used to regulate refrigerant flow into the evaporator in R134A air conditioning systems. This block-type valve is specified with female suction and liquid ports, sealing-washer styles, and a solenoid-equipped design for rear HVAC service on the Land Rover Defender 110. If you are replacing a rear expansion valve on a 2020-2023 Land Rover Defender 110, this part number 39667 matches the listed application and supports OE-style service work. This part cross-references LR131779 for the same application.

Common Problems This Part Can Address

  • Rear A/C vent temperatures that stay warm or fluctuate
  • Restricted refrigerant metering at the evaporator
  • Loss of cooling performance in the rear HVAC circuit
  • Leaking or worn expansion valve sealing surfaces
  • Service replacement for a failed rear expansion valve on a Land Rover Defender 110

Installation Notes and Tips

Verify refrigerant type before installation; this valve is specified for R134A systems. Confirm the rear HVAC location, port sizes, and sealing-washer interfaces before assembly. Replace any disturbed seals and evacuate and recharge the system according to factory service procedures after installation. For fitment, this part is listed for 2020-2023 Land Rover Defender 110, rear.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements. The aluminum construction and OE-style port configuration support professional HVAC service on the Land Rover Defender 110. Part number 39667 is also referenced by the interchange number LR131779.

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2023Land RoverDefender 110RearExpansion Valve
2022Land RoverDefender 110RearExpansion Valve
2021Land RoverDefender 110RearExpansion Valve
2020Land RoverDefender 110RearExpansion Valve
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 39667759888A99551LR131779