Answer: A timing belt typically lasts from 60,000 to 100,000 miles. The owner’s manual for your vehicle should be followed regarding the replacement of your vehicle’s timing belt. Replacing a timing belt should be done by a car-care professional only. It is a difficult process that may require moving other parts in your engine, such as the water cooler. Then, after the new timing belt is installed, it must be synchronized with the crankshaft and camshaft in order to operate properly and precisely.