Genuine OEM Volkswagen Fluid Reservoir, part number 1C0422371E. This essential component is designed to store a specific type of automotive fluid, maintaining the correct fluid level for optimal system performance. It is typically found within the engine bay, connected to its respective system. Constructed from durable, fluid-resistant plastic, this reservoir measures approximately 22.5 cm in length. Using a genuine OEM reservoir ensures chemical compatibility with vehicle fluids, a leak-proof design, and precise fitment for reliable long-term operation.