The Bosch Throttle Body Kit - 472053 is a comprehensive kit of products designed to service the throttle body of a car. The kit includes three essential components: a throttle body gasket, a throttle position sensor, and a throttle body actuator. These components work together to regulate the amount of air entering the engine, ensuring optimal performance and fuel efficiency. The gasket creates a seal between the throttle body and the engine, preventing any air leaks. The throttle position sensor measures the position of the throttle plate, while the throttle body actuator controls the movement of the throttle plate. This kit is essential for maintaining the proper functioning of the throttle body, which is a crucial component of the engine's air intake system.