Genuine OEM Audi Valve Cover Vent Tube, part number 03L103493AL. This tube is a critical component of the engine's crankcase ventilation system, designed to route gases from the valve cover to the intake system. It features specific bends and quick-connect fittings for precise installation and a secure, leak-free connection. Constructed from durable, oil-resistant plastic and rubber, it withstands engine heat and chemical exposure. Choosing a genuine OEM vent tube ensures correct routing geometry, material integrity, and proper function for emissions compliance and engine health.