Dealer requires 125 units plus labor. bought them and installed them at a local tire shop for $48. Follow google search instructions for do-it-yourself TPMS replacement. I had to do it twice, the first time they didn't take it but the second time it worked. No problems with sensors, no light. I even deflated one of the tires to check and the light came on. Switched off immediately after depressurization. So far, so good.