Does the 2007 Hyundai Sonata have a timing belt or chain?

Both of the 2007 Hyundai Sonata's engine options -- the 2.4L and the 3.3L -- use timing chains under the hood. The good news is that these are not a maintenance item; they have an estimated lifetime of 250,000 to 300,000 miles, so Your Sonata's engine has a good chance of failing before the timing chain does. However, if it does fail prematurely, You may be in for quite the repair bill. The advantage of timing belts is that they're relatively inexpensive to swap out, as You're supposed to do at regular intervals to account for routine wear and tear. The bad news is that they nickel and dime You. A timing chain (which You have) should last You the lifetime of the vehicle. However, if any unforeseen stretching or other damage occurs, You're likely looking at a repair bill of up to $3,000.