Timing chains are generally more robust than timing belts. A (timing) chain would be made of metal, while a (timing) belt would be made from strong rubber that's reinforced with high-tensile fibers. Therefore, you can expect a timing chain to last longer than a typical timing belt. On average, a timing belt would wear out after somewhere between 60,000 to 100,000 miles before you'll have to consider a timing belt replacement cost. Nevertheless, a timing chain isn't invincible, as it's also subject to wear and wear. A timing chain does at least last slightly longer before you have to replace it, averaging between 80,000 to 120,000 miles before it wears out completely.