The timing belt connects a vehicle's crankshaft and camshaft. Timing belts also play a crucial role in the proper operation of an engine's pistons and valves.
An engine's timing belt lasts for only a certain number of miles and needs to be replaced when it becomes worn or damaged. If the timing belt breaks, the engine often suffers a significant amount of damage that is expensive to repair.
The recommended interval for changing a timing belt varies, depending on the type of vehicle a driver owns. Auto manufacturers usually put the recommended interval for changing the timing belt in the owner's manual.