Genuine OEM Volkswagen Secondary Air Injection Pipe, part number 07K131125E. This pipe is a key component of the secondary air injection system, responsible for transporting air to the exhaust manifold to help reduce emissions during cold starts. It is positioned within the engine bay, connecting the air pump to the exhaust system. Made from durable black plastic with flexible corrugated sections, it is designed to withstand engine vibrations and temperature variations. Using a genuine OEM pipe ensures correct routing, precise connections, and material integrity, which are crucial for the proper functioning of the emissions control system.