How to choose the right tire pessure sensor? Please enter your car model in the "ConfirmedFit" to confirm whether the sensor is suitable. Does the TPMS sensors need to be programmed? The TPMS sensor are pre programmed, just activate them with scan tool. What should I do before install the sensor on my car? Please scan the TPMS to make sure the tool can retrieve sensor information such as frequency, psi, battery status etc before install sensor on your car. One of the sensors I purchased would not connect or work properly, how to handle with it? Don't worry about that, our stuff will help you. What should I do if I encounter problems during activation? First, you can c-ont-act us. Secondly, please change the activation tool.