Genuine OEM Volkswagen Valve Spring, part number 06J109623J. This spring is a critical component in the engine's valve train system. It provides the necessary force to close the engine valves after they have been opened by the camshaft. This ensures proper sealing of the combustion chamber. Made from durable, high-strength steel to withstand repeated compression cycles. Genuine OEM valve springs are manufactured to exact specifications for reliable performance and longevity.