The Genuine BMW Turbocharger Auxiliary Water Pump, part number 11515A36581, is a crucial component in the turbocharging system of BMW vehicles. This water pump is responsible for circulating coolant through the turbocharger to keep it at a safe operating temperature and prevent overheating. It is a genuine OEM part, designed and manufactured by BMW to meet the highest quality standards. This water pump is specifically designed for use in BMW turbocharged engines and is essential for maintaining optimal performance and longevity of the turbocharger.