Does a Porsche Cayenne have a timing belt or timing chain?

Does a Porsche Cayenne have a timing belt or timing chain?All Porsche vehicles use timing chains. While some timing belts, depending on the material from which they are constructed, can last up to 160,000 miles, there are no guarantees when its comes to longevity.Your Guide to Porsche and Audi Belt and Chain Services - Prestige Imports