EGR Valve

Save on the Cost of EGR Valve Replacement

A critical part to a vehicle's engine management and emissions system, the exhaust gas recirculation (EGR) valve is essential to the operation of modern vehicles. EGR valves reduce emissions by recirculating exhaust gasses back into the engine's combustion chamber while diluting oxygen levels. EGR valves work by opening and closing based on signals sent from a vehicle's engine control unit (ECU), which takes into account various factors such as engine load, speed, and temperature to maintain the correct air-fuel ratio so your vehicle performs as it should. Older EGR valves may also utilize engine vacuum to open and close as needed, though these systems are much less precise than modern electronic EGR systems. By diluting the amount of oxygen in the cylinders, the EGR valve lowers the temperature of combustion and reduces the formation of harmful nitrogen oxides (NOx) that are produced during the combustion process. While EGR valves are an important part of the emissions control system, they can sometimes become clogged or malfunction. This can lead to a range of issues, such as reduced fuel efficiency, engine misfires, and increased emissions. Signs of a bad or failing EGR valve include reduced power, fuel efficiency, and acceleration, a rough idle, overheating, engine knocking during acceleration, poor gas mileage, and may also cause an illuminated Check Engine light. It's important to clean or replace a clogged or failing EGR valve to keep your engine running its best. Find the engine management components you need at O'Reilly Auto Parts, including replacement EGR valves, EGR gaskets, and more to help you get the job done right and restore optimal performance to your vehicle.