Genuine OEM Audi Coolant Pump, part number 045121011H. This critical component is responsible for circulating coolant throughout the engine cooling system, ensuring efficient heat dissipation and preventing engine overheating. It is typically mounted on the engine block and driven by a belt. Weighing approximately 0.75 kg, genuine OEM coolant pumps feature precision-machined components and high-quality seals for reliable, leak-free operation and factory-specified flow rates, crucial for engine longevity.