Does the 2002 Lexus es300 have a timing belt or chain?

The 2002 Lexus ES300 has a timing belt. When replacing the timing belt, it is also common to replace the timing belt tensioner, idler pulleys, and the water pump. Timing belts are located outside of the engine and tend to dry out and crack. A failing timing belt can cause a ticking noise when the car is running. This is typically a sign that You have low oil pressure or that the engine isn't getting enough lubrication. If the timing belt has broken inside, the engine will not be able to turn over. The Lexus Dealer Service Manual shows a scheduled timing belt change at 125,000 miles for the ES300.