Genuine OEM Audi Air Intake Hose, part number 4L0129571B. This hose is a critical component of the engine's air intake system, responsible for directing filtered air into the engine. It is positioned on the left side of the engine bay, connecting to the air filter housing and intake manifold. Weighing 0.675 kg, this genuine OEM hose guarantees correct routing geometry, material composition, and resistance to engine bay temperatures and pressures, preventing air leaks and maintaining optimal engine efficiency.