Genuine OEM Nissan EGR Radiator, part number 1473500QAM. This component is part of the Exhaust Gas Recirculation (EGR) system, designed to cool hot exhaust gases before they are recirculated back into the engine's intake manifold. This process helps reduce combustion temperatures, thereby lowering NOx emissions and improving engine efficiency. Genuine OEM parts ensure precise cooling performance and system integrity.