Your Jaguar's Exhaust Gas Recirculation (EGR) valve is one vital part of the emission control system. It is in fact the main component in the EGR system. It opens a small vessel between the manifold and exhaust for the backflow of a metered amount of exhaust. Such backflow reduces the temperature of combustion while controlling the formation of nitrogen oxides. EGR valve opens when vacuum is applied to its control diaphragm. The Exhaust is routed back into the combustion chamber since the exhausted air is a lot hotter than the intake air. The EGR valve regulates the emission of nitrous oxides, which are produced due to burning of fuel at 2,500 degrees Fahrenheit. Such emission is capable of damaging your bone marrow structure in about 3 hours of exposure. Regular maintenance is not a common requirement for your Jaguar EGR Valve; however, it should be checked to ensure that your exhaust system is at good condition while complying with the emission standards. Once the exhaust system of your precious Jaguar is having a defective EGR valve, then the engine will be seriously damaged. Some of the common symptoms of a faulty EGR valve are engine knock, poor gas mileage, reduced performance, and excessive emissions. Quality Jaguar EGR valves are never out of stock here in our online store. You can check out our comprehensive parts catalog that displays thousands of auto parts in a well organized mode for your hassle-free search. Our professional personnel are always willing to entertain your queries and further clarifications through our toll-free lines that are open anytime of the day.