Genuine OEM Volkswagen Seal Ring, part number N90436301. This ring-shaped component is used to create a seal and prevent leakage between two surfaces, specifically designed for integration with a water pump assembly. It is located at position 2 in the diagram. The seal ring is critical for maintaining the integrity of the engine cooling system by preventing coolant loss. Genuine OEM seal rings are manufactured to exact specifications for optimal sealing performance and durability.