Genuine OEM Volkswagen Crankcase Ventilation Hose Assembly, part number 04E129654R. This assembly is crucial for managing crankcase gases and oil vapor, channeling them back into the engine's intake manifold to maintain optimal engine performance and reduce emissions. It is typically located within the engine bay, connecting the crankcase to the intake system. Constructed from durable, heat-resistant plastic, this assembly weighs approximately 0.329 kg. Choosing a genuine OEM part ensures precise fitment, proper sealing, and reliable operation for effective crankcase ventilation.