EGR coolers are essential components in modern exhaust gas recirculation (EGR) systems. They help to reduce engine emissions by cooling exhaust gases before they are reintroduced into the intake manifold. This cooler operation lowers combustion temperatures, resulting in reduced nitrogen oxide (NOx) emissions. EGR coolers are built to withstand the harsh underhood environment, and may be constructed from various materials such as aluminum or stainless steel to ensure durability and corrosion resistance. When considering replacement EGR coolers, important factors include compatibility with your specific vehicle and engine type, as well as material composition and overall quality.