Nissens 999376 A/C Expansion Valve

Nissens A/C Expansion Valve for Audi HVAC Service

The Nissens 999376 A/C expansion valve is a direct-fit HVAC flow restrictor for select Audi models using R134A refrigerant. Built from aluminum and supplied with O-rings, it helps regulate refrigerant flow through the air conditioning system for stable cooling performance.

Key Features

• Part number 999376
• Aluminum construction for HVAC service applications
• Designed for R134A refrigerant systems
• Block-style A/C expansion valve design
• O-rings included for sealing at the connection points
• Fits select Audi A6, A6 Quattro, A7 Quattro, RS7, S6, and S7 applications

Product Details

Nissens develops thermal management components with a focus on consistent manufacturing quality and aftermarket coverage. This A/C expansion valve is engineered for vehicles that use a block-style refrigerant metering component, helping control the pressure drop and refrigerant delivery across the evaporator circuit. The part number 999376 is listed for Audi A6 and Audi A6 Quattro models from 2012-2018, Audi A7 Quattro from 2012-2018, Audi RS7 from 2014-2018, Audi S6 from 2013-2018, and Audi S7 from 2013-2018, with R134A refrigerant noted on the 2017-2018 applications.

This part cross-references Audi 4G0898967 for the same application.

What This Part Helps Address

• Weak or inconsistent cabin cooling
• Improper refrigerant metering at the evaporator
• Pressure imbalance in the A/C circuit
• HVAC performance issues tied to a worn expansion valve
• Sealing concerns at the valve connection points

Installation Notes

Verify refrigerant type, port dimensions, and vehicle application before installation. This valve uses a block-style layout with aluminum construction and includes O-rings; mounting hardware is not included. For best results, inspect the A/C system for contamination, replace damaged seals, and evacuate and recharge the system according to factory service procedures.

Quality Assurance

Nissens manufactures thermal and engine efficiency components to controlled quality standards and continuously updates its aftermarket product range to match changing vehicle technology. Part number 999376 is built to support dependable HVAC service on the listed Audi applications.