A throttle body is a crucial component in an internal combustion engine that controls the amount of air entering the engine. It is typically located between the air intake and the intake manifold. When the driver presses the accelerator pedal, the throttle body opens to allow more air in, which helps increase engine power and efficiency. Throttle bodies can be either mechanically operated or electronically controlled. In modern vehicles, many use electronic throttle control systems, which provide more precise management of air intake. This helps improve fuel efficiency and reduce emissions, contributing to better overall engine performance and responsiveness.