The Pierburg Air Pump Check Valve (A6 Quatto) - 722769780 is an essential part of your car's air pump system. This check valve is designed to ensure only clean air is drawn into the air pump, preventing dirt and other contaminants from entering the system. It features a durable plastic construction and an advanced sealing system to ensure a tight fit and reliable performance. This check valve is designed to fit Audi A6 Quattro models from 2005-2011. It is easy to install and comes with a 1-year guarantee for your peace of mind. Invest in this high-quality check valve to keep your car's air pump system running smoothly.