A timing belt is a crucial component in an internal combustion engine. It connects the crankshaft to the camshaft, ensuring that the engine's valves open and close at the correct times in relation to the position of the pistons. This synchronization is vital for optimal engine performance and efficiency. Typically made of rubber with reinforced fibers, timing belts are designed to withstand high temperatures and stress. They require regular inspection and replacement, as a worn or broken timing belt can lead to severe engine damage. Regular maintenance helps ensure the longevity of the engine and its components, including the crankshaft and camshaft.