The Pierburg Secondary Air Injection Control Valve - 728238620 is a component used in automotive engines to control the secondary air injection system. This system helps to reduce harmful emissions by injecting fresh air into the exhaust system during cold starts. The control valve is responsible for regulating the flow of air into the system, ensuring proper functioning and efficiency. It is a high-quality, durable product designed for reliable performance in various weather conditions. The Pierburg Secondary Air Injection Control Valve - 728238620 is a crucial part of the emission control system and plays a significant role in reducing the environmental impact of vehicles.