First time I had to program tpms. I needed to replace a sensor on my 2011 Ford E250. I bought an Autel MX sensor but after a failed attempt at retraining I bought a cheap retraining tool through Revain but it didn't work. Didn't know they had to be programmed. At first I couldn't get the ts508 to program the sensor. I went to the Autel forums and learned that the sensors need to be programmed to less than 10psi. I deflated and it worked perfectly. A very intuitive tool with various programs and scanning functions. A must have item for both the DIY enthusiast and the professional.