Genuine OEM BMW Power Steering Pump Fluid Reservoir Tank, part number 32411097164. This reservoir stores the hydraulic fluid necessary for the power steering system to operate smoothly and efficiently. It is typically located in the engine bay, connected to the power steering pump and lines. Designed for exact fit and optimal fluid containment. Genuine OEM reservoirs are made from durable materials resistant to power steering fluid degradation, ensuring a leak-free and reliable system.