Nissens 9991073 A/C Expansion Valve - Front

Nissens A/C Expansion Valve for OE-Style Cooling Control

The Nissens 9991073 thermal expansion valve is built for precise refrigerant metering in automotive HVAC systems. This aluminum block-style A/C expansion valve is specified for R134 refrigerant applications and is engineered to match OE pressure performance, tightness, opening behavior, set-point calibration, and internal finish.

Key Features

• Aluminum block-style A/C expansion valve for HVAC flow control
• Designed for R134 refrigerant systems
• Includes O-rings and mounting hardware where applicable
• Built and validated to OE matching standards
• Pressure performance, tightness, and opening characteristics are tested during manufacturing
• Cross-references UAC EX10154C for the same application

Detailed Description

Nissens 9991073 is a thermal expansion valve used to regulate refrigerant flow into the evaporator, helping the A/C system maintain proper cooling performance and stable outlet temperatures. This part is a direct-fit style replacement for select Scion tC, Toyota Corolla, Toyota Matrix, and Lexus GX470 applications, including 2005-2010 Scion tC, 2005-2008 Toyota Corolla, 2005-2008 Toyota Matrix, and 2003 Lexus GX470, front. The Nissens 9991073 is manufactured to strict control standards so the valve’s opening point, sealing, and internal finish align with OE expectations.

This part cross-references UAC EX10154C for the same application.

Common Problems This Part Can Address

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• A/C performance issues caused by a sticking or worn expansion valve
• Pressure imbalance in the HVAC system
• Leaks at the valve sealing surfaces

Installation Notes and Tips

Replace the valve only after confirming the system is properly evacuated and the refrigerant type matches R134 specifications. Inspect the mating surfaces, replace the O-rings supplied with the part, and verify correct orientation of the block-style valve during installation. For fitment-based searches, this part is commonly selected for 2005-2010 Scion tC, 2005-2008 Toyota Corolla, and 2005-2008 Toyota Matrix A/C repair, as well as 2003 Lexus GX470 front HVAC service.

Quality Assurance

Nissens manufactures this expansion valve under comprehensive testing and validation procedures that check pressure performance, tightness, opening behavior, set-point setting, and internal finish. The result is an OE-matching replacement built for consistent HVAC operation in supported applications.