Genuine OEM Audi Front Center Breather Line, part number 4H0121081AT. This pipe assembly is crucial for allowing the proper ventilation of engine gases, which helps maintain optimal engine pressure and prevents harmful build-up. It is typically located in the front-center section of the engine bay. Constructed from durable rubber and plastic, this line measures approximately 1.075 meters in length and weighs 0.135 kg. Using a genuine OEM breather line ensures correct routing, material integrity, and proper engine ventilation.