Genuine OEM Volkswagen Secondary Air Injection Hose, part number 5C0131128E. This hose plays a vital role in the vehicle's emissions control system, transporting air to aid in the combustion of unburnt fuel in the exhaust stream. Constructed from durable, flexible, and heat-resistant materials, it features a foam-covered section and weighs approximately 0.197 kg. Choosing a genuine OEM hose ensures precise connections, correct routing, and resistance to high temperatures and exhaust gases, which is crucial for maintaining emission compliance and system integrity.