Genuine OEM Volkswagen Engine Auxiliary Water Pump, part number 5Q0121599AN. This electric pump plays a vital role in the engine cooling system by circulating coolant, often for specific components or during certain operating conditions. It is typically mounted within the engine bay, contributing to optimal engine temperature management. The unit weighs approximately 0.68 kg and features an integrated mounting bracket. Opting for a genuine OEM water pump ensures precise flow rates, electrical compatibility, and long-term reliability, preventing overheating and potential engine damage.