Nissens 9991071 A/C Expansion Valve - Front

Nissens A/C Expansion Valve for Toyota and Lexus

The Nissens 9991071 A/C expansion valve is a block-style thermal expansion valve built for precise refrigerant control in R134 systems. It is engineered to OE-matching standards for pressure performance, tightness, opening behavior, set-point accuracy, and internal finish.

Compatible With 2003-2008 Toyota and Lexus applications including Toyota Camry, Toyota Solara, Toyota Highlander, Toyota Sienna, Toyota Avalon, Toyota Matrix, and Lexus ES330.

Key Features

• Block-style thermal expansion valve for automotive HVAC service
• Aluminum construction for durable A/C system integration
• Designed for R134 refrigerant systems
• O-rings included for sealing at installation
• Mounting hardware included where applicable
• Built and tested to match OE pressure and flow requirements

Detailed Description

Nissens part number 9991071 is an A/C expansion valve that regulates refrigerant flow into the evaporator so the HVAC system can maintain proper cooling performance. This block-type valve is a direct-fit service part for select Toyota and Lexus models, including 2004-2008 Toyota Solara, 2005-2007 Toyota Highlander, 2004-2006 Lexus ES330, 2006 Toyota Camry, 2004-2005 Toyota Sienna front, 2004 Toyota Avalon, and 2003-2004 Toyota Matrix. This part cross-references UAC EX10308C for the same application.

Nissens manufactures these thermal expansion valves with comprehensive testing for pressure control, sealing integrity, opening characteristics, set-point calibration, and internal surface finish. The result is a replacement valve built to align with OE specifications for the Toyota Camry, Toyota Sienna, and related applications.

Common Problems This Part Can Address

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• A/C system pressure imbalance
• Evaporator performance issues caused by a worn valve
• Refrigerant leakage at the valve sealing surfaces

Installation Notes and Tips

Verify the vehicle’s refrigerant type before installation; this valve is specified for R134 systems. Replace the O-rings during service and confirm the mounting points and valve orientation match the original unit. After installation, evacuate and recharge the system according to factory procedures, then check for leaks and confirm vent temperature and compressor cycling.

Quality Assurance

Nissens validates each expansion valve for pressure performance, tightness, opening behavior, set-point setting, and internal finish to support OE-level fit and function. Part number 9991071 is manufactured to precise matching standards for the listed Toyota and Lexus applications.