A timing belt is a crucial component in an internal combustion engine, connecting the crankshaft to the camshaft. It ensures that the engine's valves open and close in sync with the movement of the pistons, allowing for efficient engine performance. Timing belts are typically made of rubber and reinforced with fibers for strength and durability. Regular maintenance of the timing belt is essential, as a worn or broken belt can lead to severe engine damage. Most manufacturers recommend replacing the timing belt every 60,000 to 100,000 miles, depending on the vehicle. Proper timing belt maintenance helps ensure the longevity and reliability of the engine.