Genuine OEM Volkswagen Secondary Air Pump Hose, part number 06A131127AB. This hose is an integral part of the secondary air injection system, responsible for transporting fresh air to the exhaust manifold during cold engine starts. This process helps to quickly heat the catalytic converter, reducing harmful emissions. Constructed from durable, heat-resistant corrugated plastic, it ensures proper air flow and withstands engine bay conditions. Opting for a genuine OEM hose guarantees precise fitment, correct routing, and the necessary material properties for effective emissions control.