Nissens 999350 A/C Expansion Valve - Front or Rear

Nissens A/C Expansion Valve 999350

Nissens 999350 is an aluminum block-style A/C expansion valve for R134A systems. It regulates refrigerant flow through the HVAC circuit to help maintain proper evaporator performance in supported applications, including Volkswagen EuroVan and Saab 900 fitments.

Key Features

• Block-style A/C expansion valve for HVAC refrigerant control
• Aluminum construction for use in automotive air conditioning systems
• Configured for R134A refrigerant
• Includes O-rings; mounting hardware is not included
• Liquid inlet thread diameter: 0.4300
• Liquid outlet thread diameter: 0.5500
• Suction inlet thread diameter: 0.6300
• Suction outlet thread diameter: 0.7900

Detailed Description

This Nissens A/C expansion valve is built to meter refrigerant entering the evaporator, helping the HVAC system maintain stable cooling performance and proper pressure balance. The block design and aluminum body make it a direct-fit service part for select Volkswagen EuroVan and Saab 900 applications, including 2000-2003 Volkswagen EuroVan front and rear auxiliary HVAC positions, 1997 Volkswagen EuroVan front and rear auxiliary HVAC positions, and 1994-1998 Saab 900 applications.

Nissens develops thermal management components with a focus on OE-style fit and manufacturing consistency. Part number 999350 is a practical replacement choice when servicing an R134A air conditioning system that uses the specified block valve configuration. This part cross-references OE numbers such as 6461E9 and 6461H1 for the same application.

What It Helps Address

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• HVAC performance issues caused by a worn expansion valve
• Pressure imbalance in the A/C circuit
• Service replacement for select Volkswagen EuroVan and Saab 900 A/C systems

Installation Notes and Tips

• Verify the vehicle uses an R134A system and the correct block-style valve before installation.
• Inspect the mating surfaces and replace the included O-rings during service.
• Confirm thread diameters and line routing match the original part.
• Recover and evacuate the A/C system properly before opening the refrigerant circuit.
• After installation, recharge the system to the manufacturer-specified refrigerant charge.

Quality Assurance

Nissens positions this part within its thermal management range and manufactures products to consistent quality standards for aftermarket service. Part number 999350 is built for the listed fitments and refrigerant specification.