The Pierburg Secondary Air Injection Pump - 722166020 is a component used in the secondary air injection system of a vehicle. This system helps reduce harmful emissions by injecting fresh air into the exhaust system. The pump is responsible for supplying the necessary air pressure to the system. It is a high-quality, durable pump designed to meet the strict emissions standards of modern vehicles. The Pierburg Secondary Air Injection Pump - 722166020 is a reliable and efficient solution for reducing emissions and improving the overall performance of a vehicle.