Genuine OEM Audi Power Steering Reservoir Tank, part number 4F0422371E. This tank is a vital component of the hydraulic power steering system, responsible for storing and supplying power steering fluid. It ensures a continuous supply of fluid to the power steering pump. Weighing 0.255 kg, this reservoir is made from durable plastic. Using a genuine OEM reservoir ensures proper fluid containment, prevents leaks, and maintains the integrity of the power steering system.