Genuine OEM Audi Power Steering Fluid Reservoir, part number 4E0422371N. This plastic container is designed to store the hydraulic fluid essential for the power steering system, ensuring a continuous supply to the power steering pump. Located in the engine bay, it often includes a filter and level markings. Weighing approximately 0.334 kg, it is built for durability. Choosing a genuine OEM power steering fluid reservoir ensures the correct fluid capacity, proper hose connections, and resistance to chemical degradation from power steering fluid, which are vital for maintaining steering system integrity and preventing leaks.