20 percent of vehicles on the road today need a serpentine belt replacement. A worn belt can not only break without warning, it can slip and damage important engine accessories. Have your belt inspected and replace it if it is worn or damaged. You'll be glad you did. At 1 STOP Tire & Auto Service in Castle Rock we install quality NAPA replacement parts. Give us a call at 303.688.0366 and let us help keep you safely and economically on the road.