Four Seasons 39283 A/C Expansion Valve

Four Seasons 39283 Expansion Valve Overview

Four Seasons 39283 is a block-type A/C expansion valve for R134A systems, built in aluminum for OE-style refrigerant control. It is a direct-fit HVAC flow restrictor for select Lexus and Toyota applications, including Lexus GS350, IS250, IS350, RX350, and Toyota Highlander coverage.

The Four Seasons Expansion Valve line focuses on accurate refrigerant metering and consistent evaporator performance. This Four Seasons 39283 expansion valve is a block-style design without a solenoid and uses captured O-ring connections for the liquid and suction lines.

Key Features

• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Captured O-ring inlet and outlet connections for secure sealing
• Female suction and liquid fittings with No. 12, No. 6, and No. 10 thread diameters as specified
• Meets or exceeds OEM requirements
• Set super heat specification: 4.500
• Designed for 1.0 ton applications
• Style: w/o solenoid

Detailed Description

Four Seasons 39283 is an A/C expansion valve used to regulate refrigerant flow into the evaporator, helping maintain proper system pressure balance and cooling performance. Its block-type layout, aluminum body, and captured O-ring sealing surfaces are specified for R134A systems found in many Lexus and Toyota vehicles. This part number 39283 is listed for applications such as 2006-2011 Lexus IS250, 2006-2011 Lexus IS350, 2007-2011 Lexus GS350, and 2007-2009 Lexus RX350, along with related GS and RX platform coverage.

This part cross-references Global Parts Distributors LLC 3411835 for the same application.

What It Helps Address

• Weak or uneven cabin cooling
• Incorrect refrigerant metering at the evaporator
• System performance issues caused by a worn expansion valve
• Refrigerant flow restriction problems in R134A HVAC systems
• Seal-related leakage at the valve connection points

Installation Notes and Tips

• Verify the vehicle uses an R134A system before installation.
• Match the block-type valve layout and captured O-ring connection style to the original part.
• Inspect the mating surfaces and replace damaged seals or contaminated components as needed.
• Confirm fitment by year, make, model, and system configuration before service.
• For fitment, this part is listed for 2006-2011 Lexus GS350, 2007-2011 Lexus GS450h, 2008-2011 Lexus GS460, 2008-2011 Lexus IS F, 2006-2011 Lexus IS250, 2006-2011 Lexus IS350, 2007-2009 Lexus RX350, 2006-2007 Lexus GS430, 2006 Lexus GS300, 2006 Lexus RX400h, and 2006 Toyota Highlander with the noted application details.

Quality Assurance

Four Seasons 39283 is specified as meeting or exceeding OEM requirements, making it a technical replacement choice for service work on compatible Lexus and Toyota HVAC systems.