Genuine OEM Mini Auxiliary Water Pump, part number 11537630368. This part functions as an auxiliary water pump, assisting the main cooling system to maintain optimal engine temperature, particularly during idle or low-speed operation. It is located in the engine cooling system. The part weighs 0.344 kg and has dimensions of 0.26m x 0.18m x 0.13m. Genuine OEM water pumps are designed with precise tolerances and materials to ensure consistent coolant flow and long service life, preventing overheating.