Does a 2013 Lexus RX 350 have a timing belt?

The 2013 Lexus RX350 comes with a timing chain on the engine. This is an improvement over the timing belts that were used in the past on the engine. The timing chain on Your engine is used to keep the timing gears in sync with each other. Your timing chain should be able to last over 300,000 miles meaning that it will not need to be replaced every 60,000 to 100,000 miles like a belt. I still think that You should inspect Your timing chain at least once a year to make sure that it is tight and free from any debris or damage. You should also change Your water pump every 100,000 miles to keep the coolant flowing in Your engine.