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Four Seasons 39660 A/C Expansion Valve
| Brand | Four Seasons 39660 |
|---|---|
| Description | Expansion Valves |
| Liquid Inlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 6 |
| Liquid Inlet Style | O-Ring |
| Liquid Outlet Fitting Gender | Female |
| Liquid Outlet Fitting Thread Diameter | No. 10 |
| Liquid Outlet Style | O-Ring |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mounting Hole Quantity | 2 |
| Refrigerant Type | R134A |
| Style | w/o Solenoid |
| Suction Inlet Fitting Gender | Female |
| Suction Inlet Fitting Thread Diameter | No. 10 |
| Suction Inlet Style | O-Ring |
| Suction Outlet Fitting Gender | Female |
| Suction Outlet Fitting Thread Diameter | No. 10 |
| Suction Outlet Style | O-Ring |
| Super Heat | -0.8 |
| Switch Included? | Not Included |
| Tonnage | 1.5 |
| Type | Block Type |
| Product line | Expansion Valve |
| Fits | Lexus and Toyota · 37 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable A/C flow control.
Aluminum construction. Lightweight material helps support efficient refrigerant management.
Block type design. Built as an expansion valve for precise refrigerant metering.
Cross-references Four Seasons 39660, 759881 and 8851547070 for the same application. See all 6.
Four Seasons 39660 Expansion Valve
Four Seasons 39660 is a block-type A/C expansion valve for R134A systems. It meters refrigerant flow through the evaporator circuit to help maintain proper cooling performance in supported Lexus and Toyota applications, including Lexus LS500h, NX350h, UX250h, ES300h and Toyota Mirai, Venza, Corolla, Prius, Prius AWD-e, RAV4, and RAV4 Prime.
Key Features
- Block-type A/C expansion valve for R134A refrigerant systems
- Aluminum construction for OE-style service replacement
- Female O-ring inlet and outlet connections
- No. 10 suction inlet and outlet thread diameter
- No. 6 liquid inlet and No. 10 liquid outlet thread diameter
- 2 mounting holes for direct-fit installation
- Meets or exceeds OEM requirements
- Style without solenoid
- Super heat setting: -0.8
- 1.5 tonnage rating
Product Details
The Four Seasons Expansion Valve line focuses on precise refrigerant control for automotive HVAC systems. Part number 39660 is built as a block-style valve with O-ring sealing surfaces on the liquid and suction sides, helping maintain consistent refrigerant metering in the evaporator. This part cross-references Toyota/Lexus OE numbers such as 8851550320 and 8851547070 for the same application. It is a direct replacement choice for vehicles that require an R134A expansion valve, including 2022-2024 Lexus NX350h, 2021-2025 Toyota Mirai, and 2019-2022 Toyota RAV4.
What It Helps Address
- Weak or uneven cabin cooling
- Incorrect refrigerant flow through the evaporator
- HVAC performance issues caused by a sticking or restricted valve
- Temperature fluctuations during A/C operation
- Service replacement for a failed OE expansion valve
Installation Notes
Verify refrigerant type, port style, and mounting layout before installation. This valve uses female O-ring fittings and a 2-hole mounting pattern, so the replacement should match the original HVAC configuration. Confirm the vehicle application by year, make, model, and Japan-built notes where listed, especially for Toyota Venza, RAV4, and Lexus ES300h applications. Proper evacuation, leak checking, and system recharge are required after service.
Quality Assurance
Four Seasons 39660 is specified as an OEM-equivalent replacement that meets or exceeds OEM requirements. It is engineered for the listed Lexus and Toyota applications and built to support accurate refrigerant control in R134A A/C systems.
| Year | Make | Model | Body Type | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2025 | Lexus | LS500h | — | — | — | — | N/A | Expansion Valve |
| 2025 | Toyota | Mirai | — | — | — | — | N/A | Expansion Valve |
| 2024 | Lexus | LS500h | — | — | — | — | N/A | Expansion Valve |
| 2024 | Lexus | NX350h | — | — | — | — | N/A | Expansion Valve |
| 2024 | Toyota | Mirai | — | — | — | — | N/A | Expansion Valve |
| 2023 | Lexus | LS500h | — | — | — | — | N/A | Expansion Valve |
| 2023 | Lexus | NX350h | — | — | — | — | N/A | Expansion Valve |
| 2023 | Toyota | Mirai | — | — | — | — | N/A | Expansion Valve |
| 2023 | Toyota | Venza | — | — | — | — | N/A | Japan Built; Expansion Valve |
| 2022 | Lexus | LS500h | — | — | — | — | N/A | Expansion Valve |
| 2022 | Lexus | NX350h | — | — | — | — | N/A | Expansion Valve |
| 2022 | Lexus | UX250h | — | — | — | — | N/A | Expansion Valve |
| 2022 | Toyota | Corolla | Sedan | 1.8L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Expansion Valve |
| 2022 | Toyota | Mirai | — | — | — | — | N/A | Expansion Valve |
| 2022 | Toyota | Prius | — | — | — | — | N/A | Expansion Valve |
| 2022 | Toyota | Prius AWD-e | — | — | — | — | N/A | Expansion Valve |
| 2022 | Toyota | RAV4 | — | 2.5L | L4 | FULL HYBRID EV-GAS (FHEV) | N/A | Japan Built; Expansion Valve |
| 2022 | Toyota | Venza | — | — | — | — | N/A | Japan Built; Expansion Valve |
| 2021 | Lexus | ES300h | — | — | — | — | N/A | Japan Built; Expansion Valve |
| 2021 | Lexus | LS500h | — | — | — | — | N/A | Expansion Valve |
| 2021 | Lexus | UX250h | — | — | — | — | N/A | Expansion Valve |
| 2021 | Toyota | Corolla | Sedan | 1.8L | L4 | ELECTRIC/GAS | N/A | Expansion Valve |
| 2021 | Toyota | Mirai | — | — | — | — | N/A | Expansion Valve |
| 2021 | Toyota | Prius | — | — | — | — | N/A | Expansion Valve |
| 2021 | Toyota | Prius AWD-e | — | — | — | — | N/A | Expansion Valve |
| 2021 | Toyota | RAV4 | — | 2.5L | L4 | ELECTRIC/GAS | N/A | Japan Built; Expansion Valve |
| 2021 | Toyota | RAV4 Prime | — | — | — | — | N/A | Japan Built; Expansion Valve |
| 2021 | Toyota | Venza | — | — | — | — | N/A | Expansion Valve |
| 2020 | Lexus | LS500h | — | — | — | — | N/A | Expansion Valve |
| 2020 | Lexus | UX250h | — | — | — | — | N/A | Expansion Valve |
| 2020 | Toyota | Corolla | Sedan | 1.8L | L4 | ELECTRIC/GAS | N/A | Expansion Valve |
| 2020 | Toyota | RAV4 | — | 2.5L | L4 | ELECTRIC/GAS | N/A | Japan Built; Expansion Valve |
| 2019 | Lexus | ES300h | — | — | — | — | N/A | Expansion Valve |
| 2019 | Lexus | LS500h | — | — | — | — | N/A | Expansion Valve |
| 2019 | Lexus | UX250h | — | — | — | — | N/A | Expansion Valve |
| 2019 | Toyota | RAV4 | — | 2.5L | L4 | ELECTRIC/GAS | N/A | Japan Built; Expansion Valve |
| 2018 | Lexus | LS500h | — | — | — | — | N/A | Expansion Valve |
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