The Bosch Throttle Body Kit - 471685 is a comprehensive kit of products designed for use in a car's throttle body system. The kit includes three essential components: a throttle body, a gasket, and a sensor. These components work together to regulate the air flow into the engine, ensuring optimal performance and fuel efficiency. The throttle body is responsible for controlling the amount of air that enters the engine, while the gasket provides a tight seal to prevent any leaks. The sensor measures the position of the throttle body, sending information to the engine control unit to adjust the air/fuel mixture for efficient combustion. This kit is essential for maintaining the proper functioning of the throttle body system in a car.