Well since this a VISUAL AID representing a typical Timing Belt System chances are your car or truck does NOT have this exact system. HOWEVER a LOT of engines in modern cars and trucks DO have a Timing Belt System something like what’s depicted in this picture. Some manufacturers are still recommending that their Timing Belts be replaced as often as every 60,000 miles. Other vehicles out there are supposed to have their Timing Belts replaced each 90, 105, or even 120,000 miles. Is your shop keeping track of this for you? If not your engine may suddenly shut off with no warning at a time totally inconvenient due to a broken Timing Belt…or may even be damaged. When you DO have it changed make sure your shop installs a Timing Belt KIT and other needed components (like WATER PUMP) to make sure your new Timing Belt goes the distance.