This NISSENS EGR valve, part number 98163, is designed to regulate the flow of exhaust gases back into the engine cylinders. This process helps to lower combustion temperatures, which in turn reduces the formation of nitrogen oxides (NOx), a major air pollutant. Proper functioning of the EGR system is crucial for meeting emissions standards and maintaining engine efficiency. A faulty EGR valve can lead to poor idling, reduced power, increased fuel consumption, and illuminated check engine lights. NISSENS is a reputable manufacturer known for producing high-quality engine management components. This EGR valve is engineered to meet or exceed original equipment specifications, ensuring a reliable and direct fit for your vehicle.