Genuine OEM Audi Coolant Radiator, part number 4F0121251AE. This radiator is essential for dissipating heat from the engine coolant, preventing overheating. It is located at the front of the vehicle, integrated into the engine cooling system. Constructed with efficient heat-transfer fins and durable tanks. Genuine OEM radiators are manufactured to exact specifications for optimal cooling performance and long service life, ensuring engine temperature stability.