Genuine OEM Audi Secondary Air Injection Hose, part number 06E133817J. This corrugated hose is a critical component of the secondary air injection system, responsible for connecting various parts to deliver fresh air into the exhaust stream. This process helps to reduce harmful emissions during cold starts. Measuring 0.56 meters in length and weighing 0.069 kg, its specific routing and material are designed for durability. Genuine OEM hoses ensure precise fitment, resistance to engine bay temperatures and chemicals, and proper function of the emissions system.