Nissens 999319 A/C Expansion Valve - Front

Nissens A/C Expansion Valve for Audi, Porsche, Volkswagen

The Nissens 999319 A/C expansion valve is a block-style HVAC flow restrictor built with an aluminum body and R134A refrigerant compatibility. It is engineered for front-mounted applications on select Audi Q7, Porsche Cayenne, and Volkswagen Touareg models, with included O-rings for a proper seal at service time.

Key Features

• Block-style A/C expansion valve for HVAC refrigerant control
• Aluminum construction for durable thermal-system service
• Designed for R134A refrigerant systems
• Includes O-rings for sealing at the connection points
• Front-position fitment on select Audi Q7, Porsche Cayenne, and Volkswagen Touareg applications
• Nissens part number 999319 for direct reference

Detailed Description

Nissens 999319 is an A/C expansion valve used to regulate refrigerant flow through the air conditioning system, helping maintain proper pressure balance across the evaporator circuit. This block-type valve features aluminum construction and connection dimensions that match the listed OE-style applications. It is a practical replacement choice for front HVAC service on 2006-2015 Audi Q7, 2008-2010 Porsche Cayenne, and 2006-2010 Volkswagen Touareg models, including the 2006 Touareg from chassis/VIN 7L-6-052 001. This part cross-references UAC EX10314C for the same application.

Vehicle Fitment

• Fits 2007-2015 Audi Q7, front
• Fits 2008-2010 Porsche Cayenne, front
• Fits 2007-2010 Volkswagen Touareg, front
• Fits 2006 Volkswagen Touareg, front, from chassis/VIN 7L-6-052 001

What It Helps Address

• Weak or inconsistent A/C cooling performance
• Improper refrigerant metering at the evaporator
• Pressure imbalance in the HVAC circuit
• Service replacement for a leaking or restricted expansion valve
• Front A/C system repair on Audi Q7, Porsche Cayenne, or Volkswagen Touareg models

Installation Notes and Tips

Confirm refrigerant type, port orientation, and vehicle chassis/VIN before installation. Replace the O-rings with clean, properly lubricated seals during service, and evacuate and recharge the system according to factory procedures after installation. Verify the front HVAC circuit is free of contamination or debris before fitting Nissens 999319.

Quality Assurance

Nissens develops thermal-management components for the aftermarket with a focus on OE-style fit and manufacturing consistency. The 999319 expansion valve is built to support reliable A/C system service on the listed Audi, Porsche, and Volkswagen applications.