Denso 475-0509 A/C Expansion Valve - Rear

Denso New Expansion Valve 475-0509

Denso 475-0509 is a new A/C expansion valve for vehicles that use an angle valve design. It regulates refrigerant flow into the evaporator, helping the air conditioning system maintain proper cooling performance across the low and high sides of the circuit.

Denso’s New Expansion Valve line focuses on OE-style replacement parts for automotive HVAC service. This part cross-references Four Seasons 38616 for the same application.

Key Features

• Angle valve A/C expansion valve for HVAC refrigerant control
• Helps separate suction and discharge sides of the air conditioning system
• Supports proper evaporator heat exchange by metering liquid refrigerant flow
• OE-specified O-rings are noted in fitment applications where listed
• Direct replacement option for select Toyota, Lexus, and Suzuki vehicles

Detailed Description

The Denso 475-0509 expansion valve is built for precise refrigerant metering in automotive air conditioning systems. When the valve calibration is correct, the evaporator can absorb heat as intended and the system can deliver stable cabin cooling. If calibration is off, the evaporator can lose efficiency or freeze, which can lead to additional HVAC damage.

Compatible With select 1990-2004 Suzuki Samurai, Sidekick, Swift, Verona, and X-90 applications, plus Toyota T100 and Pickup models and the rear A/C system in the 1999-2000 Lexus LS400. Use this part number 475-0509 when replacing a worn or malfunctioning expansion valve in those listed vehicles.

What It Helps Fix

• Weak or inconsistent A/C cooling
• Evaporator icing or freeze-up
• Incorrect refrigerant flow through the evaporator
• Poor temperature control in rear A/C systems
• HVAC performance issues caused by a failing expansion valve

Installation Notes and Tips

Verify the vehicle’s exact year, make, model, and A/C configuration before installation. Fitment includes applications for rear A/C on the Lexus LS400 and R134A-specific Toyota and Suzuki listings, so matching the system type matters. Inspect the mating surfaces and follow the vehicle service procedure for refrigerant recovery, evacuation, and recharge.

Quality Assurance

Denso draws on long-term OE HVAC engineering experience to supply the correct expansion device for the listed applications. The part number 475-0509 is built as a new replacement component for service work on compatible Toyota, Lexus, and Suzuki air conditioning systems.