Nissens 999374 A/C Expansion Valve

Nissens A/C Expansion Valve for Honda and Acura

The Nissens 999374 A/C expansion valve regulates refrigerant flow in the air conditioning system to help maintain proper cooling performance. Built from aluminum and configured as a block-style valve for R134A systems, it is a direct-fit service part for select Honda Civic, Honda CR-V, and Acura RDX applications.

Key Features

• Brand: Nissens
• Part number: 999374
• Block-style A/C expansion valve
• Aluminum construction
• Designed for R134A refrigerant systems
• O-rings included; mounting hardware not included
• Liquid inlet thread diameter: 0.4300
• Liquid outlet thread diameter: 0.6300
• Suction inlet thread diameter: 0.7100
• Suction outlet thread diameter: 0.7100

Detailed Description

Nissens develops thermal management components with a focus on aftermarket fit and function, and the 999374 expansion valve follows that approach for select Honda and Acura HVAC systems. This valve meters refrigerant into the evaporator to support stable cabin cooling, making it a practical replacement when the original valve is restricted, leaking, or no longer controlling flow correctly. This part cross-references OE numbers 80221SNAA01 and 80221STKA41 for the same application.

Compatible With 2007-2012 Acura RDX, 2006-2012 Honda Civic, 2010-2011 Honda CR-V, 2007 Honda CR-V, and 2007-2009 Honda CR-V, Exc. Japan Built Vehicle. The Nissens 999374 is also a relevant search match for Honda Civic A/C expansion valve replacement and Honda CR-V HVAC service parts.

What It Helps Fix

• Weak or inconsistent A/C cooling
• Refrigerant flow restriction at the evaporator
• Erratic vent temperatures
• Leaking or worn expansion valve seals
• HVAC performance loss in R134A systems

Installation Notes and Tips

Verify refrigerant type, port dimensions, and vehicle fitment before installation. Replace the O-rings during service, inspect the surrounding A/C lines and evaporator connections for wear, and evacuate and recharge the system according to factory procedures after repair. The valve is supplied without mounting hardware.

Quality Assurance

Nissens manufactures thermal and engine efficiency components to consistent aftermarket standards, and this part is produced as a Genuine Nissens Quality component. It is built for the specified vehicle applications and refrigerant system requirements listed above.