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. Modern throttle bodies often use electronic controls, known as drive-by-wire systems, instead of traditional mechanical linkages. This allows for more precise control of air intake, improving performance and fuel efficiency. Proper functioning of the throttle body is essential for optimal engine performance and responsiveness.