The belts and hoses in your vehicle are critical to its performance, but they are exposed to extreme hot and cold temperature, and can degenerate over time. Critical wear factors such as ozone, oil, heat and abrasion break down hose integrity and can reduce the overall lifespan of your engine dramatically. Hoses crack, and belts fray, stretch, and break. Fortunately these parts are often not all that costly, and can usually be replaced fairly easily.