What should the tire pressure be on a Hyundai Elantra?

Answer 1

Read the sidewalls of the tires themselves. They have it printed on them. Generally 30-40 PSI is adequate, but it might not be for your particular tires.

That answer is entirely wrong. The number on the tire is exactly what it says "maximum" PSI. Everymanufacturer recommends atire pressure and that is what should be used. My 2005 Elantra has it printed in the owner's manual (30 PSI front & back & 50 for spare tire). OEM tires said 42 max. so it's quite different. As long as you replace the tires with the same size (not necessarily same kind) it will be the same. It is normally in the manual or inside the door jam or inside the glove compartment.
It can also be listed on a label on the driver's door jamb