Yup, I really don't need a pressure sensor, I have been driving for decades without one. But it's there. I have also used fix-a-flat a number of times over those years and not once did a tire dealer tell me they could not fix the tire or balance it because of it. So I don't know how much of that is hype or just a way some places sell tires. Actually, the plug and pump is not a bad idea. I have plugged tires at home before. Any way, I will keep it in the car for emergencies and see how much it costs if I ever have to use it. Thanks all.