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Four Seasons 39443 A/C Expansion Valve - Front
| Brand | Four Seasons 39443 |
|---|---|
| Position | Front |
| Color | Aluminum |
| Description | Expansion Valves |
| Liquid Inlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 6 |
| Liquid Inlet Size IN | 0.4 |
| Liquid Inlet Size MM | 10.15 |
| Liquid Inlet Style | Captured O-Ring |
| Liquid Inlet Thread Type | Not Threaded |
| Liquid Inlet Type | O-Ring |
| Liquid Outlet Fitting Gender | Female |
| Liquid Outlet Fitting Thread Diameter | No. 10 |
| Liquid Outlet Style | Captured O-Ring |
| Liquid Outlet Thread Type | Not Threaded |
| Liquid Outlet Type | O-Ring |
| Lqd Out Size IN | 0.61 |
| Lqd Out Size MM | 15.5 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mounting Hole Quantity | 2 |
| O-Ring A Number/Desc | [24611] / Green O-Ring |
| O-Ring B Number/Desc | [24661] / Green O-Ring |
| O-Ring C Number/Desc | [24681] / Green O-Ring |
| Refrigerant Type | R134A |
| Style | w/o Solenoid |
| Suc In Size IN | 0.72 |
| Suc In Size MM | 18.3 |
| Suc Out Size IN | 0.72 |
| Suc Out Size MM | 18.3 |
| Suction Inlet Fitting Gender | Female |
| Suction Inlet Fitting Thread Diameter | No. 12 |
| Suction Inlet Style | Captured O-Ring |
| Suction Inlet Thread Type | Not Threaded |
| Suction Inlet Type | O-Ring |
| Suction Outlet Fitting Gender | Female |
| Suction Outlet Fitting Thread Diameter | No. 12 |
| Suction Outlet Style | Captured O-Ring |
| Suction Outlet Thread Type | Not Threaded |
| Suction Outlet Type | O-Ring |
| Super Heat | 5.500 |
| Switch Included? | Not Included |
| Tonnage | 0.600 |
| Type | Block Type |
| Product line | Expansion Valve |
| Fits | Lexus and Toyota · 6 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for a confident fit.
Block type design. Simplifies refrigerant flow control in the A/C system.
Aluminum construction. Lightweight material with captured O-ring connections.
Cross-references Four Seasons 39443, Global Parts Distributors LLC 3411799 and 217443 for the same application. See all 7.
Four Seasons 39443 Expansion Valve Overview
Four Seasons 39443 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and captured O-ring connections for consistent refrigerant control. It is a direct-fit HVAC flow restrictor for select Lexus RX400h and Toyota Highlander applications, including front-position coverage on the 2008 Highlander.
Key Features
- Block-type A/C expansion valve for R134A refrigerant systems
- Aluminum construction with aluminum finish
- Captured O-ring liquid and suction connections
- Female suction and liquid fittings with No. 12, No. 6, and No. 10 thread diameters as specified
- Super heat setting: 5.500
- Meets or exceeds OEM requirements
- OE-style replacement for HVAC service on Lexus RX400h and Toyota Highlander
Product Details
The Four Seasons Expansion Valve line focuses on precise refrigerant metering for automotive air conditioning systems. Part number 39443 is a w/o solenoid design with a 0.600 tonnage rating, captured O-ring inlet and outlet styles, and OE-matching connection geometry for service work on the factory A/C circuit. This part cross-references Global Parts Distributors LLC 3411799 for the same application. Use Four Seasons 39443 when replacing a worn or restricted expansion valve in 2006-2008 Lexus RX400h and 2006-2008 Toyota Highlander A/C systems.
Common Problems This Part Can Address
- Weak cabin cooling from incorrect refrigerant flow through the evaporator
- Erratic vent temperatures caused by a sticking or restricted expansion valve
- Compressor cycling issues related to improper superheat control
- A/C performance loss after contamination or internal valve wear
- Service replacement needs on Lexus RX400h and Toyota Highlander HVAC systems
Installation Notes and Tips
Verify the vehicle’s refrigerant type, connection style, and mounting layout before installation. This valve uses captured O-ring fittings and is specified for R134A systems, so the sealing surfaces should be inspected carefully during service. Confirm the application by year, model, and position: Fits 2007-2008 Lexus RX400h, N/A; Fits 2008 Toyota Highlander, Front; Fits 2007 Toyota Highlander, N/A; Fits 2006 Lexus RX400h, N/A, From 2/06; Fits 2006 Toyota Highlander, N/A, From 2/06.
Quality Assurance
Four Seasons 39443 is listed as meeting or exceeding OEM requirements for the specified applications. The part number 39443 is also referenced in interchange listings for service identification and catalog matching.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2008 | Lexus | RX400h | — | — | — | N/A | Expansion Valve |
| 2008 | Toyota | Highlander | 3.3L | V6 | ELECTRIC/GAS | Front | Expansion Valve |
| 2007 | Lexus | RX400h | — | — | — | N/A | Expansion Valve |
| 2007 | Toyota | Highlander | 3.3L | V6 | ELECTRIC/GAS | N/A | Expansion Valve |
| 2006 | Lexus | RX400h | — | — | — | N/A | From 2/06; Expansion Valve |
| 2006 | Toyota | Highlander | 3.3L | V6 | ELECTRIC/GAS | N/A | From 2/06; Expansion Valve |
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