Purchased after constantly seeing reports on RV websites of RV body damage caused by emissions. Two weeks ago I put on new tires and installed sensors. As we started our ride, I noticed that the left rear wheel was losing pressure pretty quickly. Went to a tire shop who found the rim was not cleaned properly and the new tire bead is not seated properly! Without the TST, this tire would have blown, and most likely my fifth front axle tire would have blown due to uneven loading. A very happy customer. ***Urgent update** During the second half of our trip another tire leaked. Let's go back to the dealer. You accidentally installed the wrong valve stems! Rubber to all metal. The rubber rods rubbed where they passed through the rim due to the added weight of the sensor. It sounded wrong, but close examination of the stems showed they were right. They replaced all 4 bars with 100% metal - as required by the TST instructions - and everything seems fine. Coincidentally, on the way home, we saw a tourist trailer parked on the side of the road with punctures and body damage! I was grateful it wasn't us.