The correct tire pressure for a Lexus IS250 is between 35–36 psi for front tires and between 36–38 psi for rear tires. The exact tire pressure specs will depend on what type of tires your IS250 is equipped with.
If your Lexus is outfitted with a multi-information display, you’ll be able to see each tire’s current pressure reading by toggling to the “tire pressure” menu. There you can find all the info you need to keep your tires properly inflated.
However, if your tires are not equipped with tire pressure sensors, your Tire Pressure Monitoring System may not be able to give you tire pressure information.