Next time buy OEM sensors from a discount parts store (like HyundaiOEMpartsdirect), to avoid issues like that. As far as having to reset them every time, I was under the impression newer vehicles automatically do that after a few miles. Not sure if SFs, but let's see what others say. You could try when you put back the OEM wheels, and wait a few miles to see if they auto-calibrate, and pressures show up. And yes, I'd absolutely buy a tool now that you're stuck with those sensors. And if you bought the right sensors, it should work on both OEM and aftermarket, since they must use the same frequency. Dealers always want to screw you. Good luck.