Four Seasons 39604 A/C Expansion Valve

Four Seasons 39604 Expansion Valve Overview

Four Seasons 39604 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and O-ring style connections. It is an OE-style replacement that meets or exceeds OEM requirements and is specified for 1.5 ton applications with a -6.8 super heat setting.

Use this Four Seasons expansion valve when servicing Toyota and Lexus HVAC systems that need precise refrigerant flow control. The 39604 part number is commonly searched for Toyota Camry, RAV4, Corolla, and Lexus ES applications.

Key Features

• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction for HVAC service applications
• O-ring inlet and outlet connections on liquid and suction sides
• Female fittings with No. 10 suction inlet and outlet thread diameter
• Liquid inlet No. 6 and liquid outlet No. 10 thread diameter
• 2 mounting holes for direct HVAC installation
• Meets or exceeds OEM specifications
• Style: w/o solenoid
• Super heat setting: -6.8

Product Details

Four Seasons Expansion Valve 39604 is part of the brand’s expansion valve line for automotive air conditioning flow control. In an A/C system, the expansion valve meters refrigerant into the evaporator so the system can maintain proper cooling performance and pressure balance. This unit is built for R134A systems and uses O-ring style liquid and suction connections for service on late-model Toyota and Lexus vehicles.

Cross-reference part numbers include UAC EX529514C and A99481 for the same application.

What It Is Used For

• Restoring weak or inconsistent cabin cooling
• Addressing improper refrigerant metering in the evaporator circuit
• Correcting A/C performance issues tied to a sticking or worn expansion valve
• Supporting service on Toyota Camry, RAV4, Corolla, and Lexus ES HVAC systems
• Replacing a failed block-type expansion valve in R134A applications

Fitment

• Fits 2021-2025 Lexus ES250, N/A, Expansion Valve
• Fits 2019-2025 Lexus ES350, N/A, Expansion Valve
• Fits 2025 Lexus UX300h, N/A, Expansion Valve
• Fits 2019-2025 Toyota Corolla, N/A, Expansion Valve
• Fits 2025 Toyota Crown Signia, N/A, Expansion Valve
• Fits 2023-2025 Toyota GR Corolla, N/A, Expansion Valve
• Fits 2022-2025 Toyota RAV4, N/A, Expansion Valve
• Fits 2023-2024 Lexus UX250h, N/A, Expansion Valve
• Fits 2018-2024 Toyota Camry, N/A, Expansion Valve
• Fits 2024 Toyota Venza, N/A, Expansion Valve
• Fits 2023 Toyota Corolla Cross, N/A, Expansion Valve
• Fits 2022-2023 Toyota Venza, N/A, Except Japan Built; Expansion Valve
• Fits 2019-2022 Lexus UX200, N/A, Expansion Valve
• Fits 2022 Toyota Avalon, N/A, Expansion Valve
• Fits 2019-2020 Toyota Avalon, N/A, Expansion Valve
• Fits 2019-2022 Toyota C-HR, N/A, Japan Built; Expansion Valve
• Fits 2021 Toyota Avalon, N/A, Exp Valve; Expansion Valve
• Fits 2021 Toyota RAV4, N/A, w/ Dual Climate Control; Expansion Valve
• Fits 2021 Toyota RAV4 Prime, N/A, w/ Dual Climate Control; Expansion Valve
• Fits 2019-2020 Toyota RAV4, N/A, Excl. Japan Built; w/ Dual Zone Climate Control; Expansion Valve
• Fits 2019-2020 Toyota RAV4, N/A, Japan Built; w/ Dual Zone Climate Control; Expansion Valve
• Fits 2018 Toyota Camry, N/A, Excl. Japan Built; Expansion Valve

Installation Notes and Tips

Verify the refrigerant type, connection style, and vehicle build notes before installation. This valve uses female O-ring fittings and is not threaded, so the sealing surfaces and O-rings should be inspected carefully during A/C service. Confirm the vehicle’s climate control configuration, especially on RAV4 and Venza applications with dual-zone or dual climate control notes.

Quality Assurance

Four Seasons 39604 is listed as meeting or exceeding OEM requirements for the specified applications. Its OE-style construction and application-specific fitment support accurate replacement on Toyota and Lexus HVAC systems.