Only two of the four TPMS sensors I bought could be programmed by my local Toyota dealer. I bought these sensors because they were new and made by an OEM (Denso) for Toyota vehicles. The sensors were built into Toyota alloy wheels and installed by Toyota service technicians. You could not program two sensors. Purchasing these sensors turned out to be quite expensive as I had to pay for the defective sensors to be removed, reinstalled and tire balanced, and I had to pay the dealer price for two TPMS sensors to replace the defective ones. These sensors must be reliable the first time. It is too expensive, tedious and time consuming to send sensors back after they have been installed in a mounted and balanced tire and then repeat the process with new sensors that may or may not work.