Interval was changed for the 2007 Elantra. I suspect the 90,000 is
correct.
I checked the online manual and the only reference I saw to replacing
the timing belt was in the maintenance chart, which indicated to
inspect at 4 years/60k and replace at 6 years/90k. Not sure what
you'll be able to find on the inspection. Typically cannot discern
condition of the belt unless the teeth are beginning to come off.