Does my Hyundai Sonata have TPMS?

I have a 2007 Hyundai Sonata Limited with a V6 engine that I purchased used. I'm trying to figure out if it is equipped with the Tire Pressure Monitoring System (TPMS) which will alert you if the tire pressure gets too low. Currently it does not have the metal tire stems - it has black plastic ones. However, the dashboard does have the TPMS icon built in (the tire-looking icon with the exclamation point) but not lit up. Hyundai says it should be equipped (checked by VIN) but my dealership says it is not (also checked by VIN). Is there any way of knowing for sure if my car has it equipped so if I purchase the sensors it will work?