I went for a drive yesterday and got stuck on the side of the road with a flat tire. Luckily, I didn't use the tire slime. I called AAA and they inflated the tire again. We found a leak coming from the valve stem. We tightened up the nut holding the valve stem (and TPMS, I assume) to the rim and the leak went away. Moral of the story, check those valve stem nuts and carry a small tire pump! The geniuses that installed my new tires didn't tighten them, I assume. I also found out that my rear TPMS sensors are swapped. The tire guys also managed to screw that up. Is there a way to retrain the TPMS system so that it gets the right sensors in the right places?