Genuine OEM Nissan EGR Valve, part number 1471000Q1E. This Exhaust Gas Recirculation (EGR) valve is a critical component for emissions control. It works by recirculating a portion of the exhaust gas back into the engine's cylinders, which lowers combustion temperatures and reduces the formation of nitrogen oxides (NOx). Manufactured to exact factory specifications for reliable operation and compliance with emissions standards.