I've had a low tire pressure warning light on my truck from time to time, but it's a simple system so I couldn't tell which tire sensor was faulty (tire pressure was always Well). This TPMS shows the actual tire pressure and temperature in real time so I now know everything is fine. In fact, I saw that my tire pressure was a bit higher than normal, so I corrected it now (this pressure increases quite a bit as the tires warm up!). Easy installation and clear display. Just remember to put the sensors back on the correct wheels after the corner.