Genuine OEM Volkswagen Engine Coolant Radiator, part number 5N0121253H. This radiator is a critical component of the engine cooling system, responsible for dissipating heat from the engine coolant to the ambient air. It ensures the engine maintains optimal operating temperatures and prevents overheating. Weighing approximately 3.63 kg and measuring 0.775 m in length, a genuine OEM radiator provides the correct cooling capacity and precise mounting points for efficient heat exchange and reliable performance.