The Pierburg Secondary Air Injection Pump - 722166660 is a component of a vehicle's emission control system. It is responsible for injecting fresh air into the exhaust system to help reduce harmful emissions. This pump is designed to work in conjunction with the vehicle's engine and catalytic converter to ensure optimal performance and compliance with emission regulations. It is a high-quality and durable pump that is specifically designed for use in various makes and models of vehicles. The Pierburg Secondary Air Injection Pump - 722166660 is an essential part of a vehicle's emission control system and plays a crucial role in reducing pollution and improving air quality.