The Bosch Idle Control Valve - 0280140543 is a component used in automotive engines to regulate the amount of air entering the engine while the vehicle is idling. It is responsible for maintaining a consistent idle speed and preventing stalling. This valve is designed to open and close in response to signals from the engine control unit, allowing the engine to run smoothly at idle. It is a high-quality product from Bosch, a trusted brand in the automotive industry.