Genuine OEM Audi Cylinder Block Ventilation Valve, part number 06E103772C. This essential engine component is part of the crankcase ventilation system, designed to manage and recirculate blow-by gases from within the cylinder block. It helps maintain proper crankcase pressure, preventing oil leaks and ensuring efficient engine operation while reducing harmful emissions. This assembly is typically mounted on or near the engine block, connecting to the intake system. Constructed from durable cast metal and high-temperature resistant plastic, it weighs approximately 1.63 kg. Using a genuine OEM ventilation valve guarantees precise flow control and material integrity, critical for long-term engine health and compliance with emission standards.