Four Seasons 39665 A/C Expansion Valve - Rear

Four Seasons 39665 Rear A/C Expansion Valve

The Four Seasons Expansion Valve, part number 39665, is a block-type A/C expansion valve built for rear HVAC service on select Land Rover applications. It meters refrigerant flow in R134A systems to help maintain proper evaporator performance and stable superheat control.

For buyers searching for a rear A/C expansion valve for Land Rover Discovery or Range Rover Sport, this OE-style replacement matches the listed fitment and mounting style. Four Seasons 39665 is an aluminum valve with female O-ring connections and solenoid-style construction.

Key Features

• Brand: Four Seasons Expansion Valve
• Part number: 39665
• Block-type A/C expansion valve for rear HVAC systems
• Aluminum construction
• R134A refrigerant type
• Female O-ring suction and liquid connections
• Solenoid style
• Meets or exceeds OEM requirements
• Super heat setting: 10.000
• Mounting hole quantity: 2

Product Details

Four Seasons 39665 is engineered for rear air conditioning circuits that require precise refrigerant metering. The valve uses No. 12 female suction inlet and outlet threads, along with No. 8 liquid inlet and No. 10 liquid outlet threads, all in an O-ring style configuration. This makes it a direct-fit service part for the specified Land Rover rear HVAC applications, including Discovery, Discovery Sport, and Range Rover Sport models.

This part cross-references LR072510 and A99549 for the same application. If you are replacing a rear A/C expansion valve on a Land Rover Discovery or Range Rover Sport, Four Seasons 39665 provides the correct block-type layout for the listed vehicles.

What It Helps Address

• Weak or inconsistent rear cabin cooling
• Improper refrigerant flow through the evaporator
• Incorrect superheat control in the rear HVAC circuit
• Expansion valve leakage at O-ring connections
• Service replacement for a failed rear A/C metering valve

Installation Notes

• Verify the vehicle uses R134A refrigerant before installation.
• Confirm rear-position fitment against the listed Land Rover model and year.
• Inspect O-rings and sealing surfaces before assembly.
• Match the block-type valve orientation and mounting points to the original part.
• Recover and recharge the A/C system according to proper service procedures.

Quality Assurance

Four Seasons 39665 is listed as meeting or exceeding OEM requirements, making it a technical replacement choice for rear HVAC service. Confirmed fitment includes 2022-2024 Land Rover Discovery, rear; 2018-2021 Land Rover Range Rover Sport, rear; 2019-2020 Land Rover Discovery, rear; and 2019-2020 Land Rover Discovery Sport, rear.