The Exhaust Gas Recirculation (EGR) valve in your Volkswagen's emission control system is the main component in the EGR system. The Volkswagen EGR valve opens a small vessel between the manifold and exhaust, providing the backflow of a metered amount of exhaust. This backflow lessens the combustion temperature as the formation of nitrogen oxides is controlled. Once the vacuum is applied to its control diaphragm, the EGR valve opens. The Exhaust goes back into the combustion chamber considering that the exhausted air is much hotter than the intake air. EGR valve controls the emission of nitrous oxides produced from the burning of fuel at 2,500 degrees Fahrenheit. NOx emissions are capable of damaging your bone marrow structure in about 3 hours of exposure. Although regular maintenance is not a requirement for your Volkswagen EGR Valve, it has to be checked to ensure that your exhaust system is at good condition and is complying with the emission standards. You must keep your Volkswagen from a defective EGR valve to prevent serious damage on your vehicle's engine. The common symptoms of a damaged EGR valve are engine knock, reduced performance, poor gas mileage, and excessive emissions. Volkswagen EGR valves are always in stock here in our online store. You can check out our complete line of products through our parts catalog that is designed to facilitate an easy search. Improve your engine performance and gas mileage while passing the emission tests with a new EGR valve for your Volkswagen. If you need some assistance, our trained staffs are waiting for your call through our toll-free lines any time of the day. We guarantee a professional rate service upon your visit on our store.