Originally Posted by COLOUJK
look at the valve stem. If it is metal, then you have the tpms sensors. If it is rubber you dont.
I don't think that is true. I didn't have metal stems and had TPMS sensors.
I would say you most likely have the sensor. They would have to deflate the tire to get the sensor out, doubt they went to the trouble.
I've changed tires/wheels twice so far. The first time I had them put the sensors out of the OEM wheels and put them in my first set. It was pretty useless since I kept them at 30 PSI and the warning goes off if you're less than 35. This can be fixed with the AEV Procal though ($150).
When I got my second set of wheels, I didn't want to bother with having them pulled and moved again. Plus, I wanted the tires mounted on the wheels before I got there so I could just get in and out fast.
So I currently don't have the sensors in. I got the Procal and turned the warning light off. Pretty useless anyway since I air down and back up at least every few weeks now. Plus, I've gotten pretty good at eye balling my tires to know if they're the correct pressure.