Vehicle manufacturers recommend that timing belts be replaced approximately every 60,000 to 80,000 miles, with some going up to 100,000 miles. They also recommend that the components of the timing system be changed simultaneously. The ContiTech Pro Series Plus timing kit comes complete with timing belt, tensioners (hydraulic when applicable), idlers, water pump, cam and balance shaft seals. Every kit comes with a lifetime guarantee based on the vehicle manufacturers' recommended change interval for the belt. Every ContiTech belt meets or exceeds OE standards. That's why you'll find them on some of the world's finest automobiles including Audi, BMW, Maserati, Mercedes-Benz, Porsche, Rolls Royce, SAAB, Volkswagen, and Volvo, as well as non-European brands like Chrysler, Ford, GM, Hyundai, Kia, and Nissan. All products are backed by the CRP promise of quality and superior service.