Good point and good question. I had Brakes By The Bay replace the rear tire pressure sensors with sensors recommended by the local Chrysler dealer. Breaks By The Bay was unable to get the new tire pressure sensors to function with TPMS. I then went back to the Chrysler dealership. The too were unable to get the TPMS reprogramed. I am know about $500.00 into this adventure and the warning light is still driving me crazy. However, my love affair with the Crossfire continues.