Pierburg 7.05817.05.0 Emission Check Valve

Pierburg Emission Check Valve for Audi and Volkswagen

The Pierburg 7.05817.05.0 emission check valve is a pneumatic, non-return valve used in the evaporative emission control system. It helps maintain one-way flow in the EVAP circuit, supporting proper vapor management on select Audi A4, Audi A4 Quattro, Audi A6, Audi A6 Quattro, Audi S5, and Volkswagen Passat applications.

• Pneumatic operating mode for evaporative system control
• Non-return valve design to maintain directional flow
• OE-style replacement for select Audi and Volkswagen applications
• Cross-references Pierburg 7.05817.05.0 for the same application
• Also cross-references 07C133529A for select OE-matched applications

Detailed Product Information

Built for emission control service, this Pierburg emission check valve is used in the evaporative system to regulate vapor flow and prevent reverse movement through the circuit. The part number 7.05817.05.0 is listed for multiple Audi and Volkswagen platforms, including 2002-2008 Audi A4, 2002-2008 Audi A4 Quattro with OE No. 07C133529A, 2006-2011 Audi A6, 2005-2011 Audi A6 Quattro, 2008-2009 Audi S5, 2010-2012 Audi S5 with production date to 17.11.2008, and 2000-2005 Volkswagen Passat. It is also listed for 2001 Audi A4 and 2009 Audi A4 Quattro.

For buyers searching for an Audi A4 Quattro evaporative system check valve, an Audi A6 emission check valve, or a Volkswagen Passat EVAP non-return valve, this Pierburg part provides a direct fitment reference by vehicle and model year. The pneumatic valve type is suited to systems that rely on controlled vacuum or pressure signals within the emission circuit.

Common Symptoms This Part May Address

• EVAP system fault codes related to vapor flow direction
• Fuel vapor leakage caused by a valve that no longer seals properly
• Rough evaporative system operation during purge or vent events
• Check engine light concerns tied to emission control performance
• Incorrect pressure retention in the evaporative system

Installation Notes and Tips

Verify the OE number and vehicle build date before ordering, especially for Audi S5 applications with the production date note. Confirm the existing valve orientation and hose routing before removal so the replacement is installed in the same flow direction. Because this is an emission control component, inspect connected vacuum and vapor lines for cracks, looseness, or contamination during service.

Quality Assurance

Pierburg is an established OE supplier in engine management and emission control components. This part is identified by Pierburg 7.05817.05.0 and is cataloged for direct application matching on select Audi and Volkswagen vehicles.