I'm in the process of getting mine done soon. The manual says every 60,000 miles. It's a"no valve clearance" engine, which means if the timing belt slips or breaks, and as the engine goes out of time, the pistons will hit and bend the valves...VERY Costly! Engine costs approx. $5500.00 and head rebuilds can cost $3000.00+ EACH. The best quote is almost $900.00 to do timing belt, tensioner, and the water pump (while they're in there).