A throttle cable is a flexible wire that connects the accelerator pedal to the engine's throttle body in vehicles. When the driver presses the accelerator, the cable pulls on the throttle, allowing more air and fuel into the engine, which increases power and speed. This component is crucial for controlling the engine's performance and responsiveness. Over time, throttle cables can wear out or become frayed, leading to issues like poor acceleration or a stuck throttle. Regular maintenance can help ensure the throttle cable functions properly, contributing to the overall efficiency of the vehicle.