Nice diagram (as always)! I couldn't figure out that with data from ABS wheel speed sensors, the only thing this TPMS can do is to compare the speeds and find the under-inflated tire with faster rotation speed and send out the warning. Since there is no individual tire pressure data, what the system can do with additional barometric pressure and temperature data? And history too?
Although I prefer a cheaper and simpler TPMS system as long as it meets Federal regulation requirement, but people should know its limitations. Most drivers will never check the tire pressures by themselves, even during seasonal temperature drop. They'd thought the TPMS will warn them if the tire pressures are low. That's why a direct-read TPMS like Nissan Rogue's
is perfect for them. It actually makes car driving safer in a whole picture.
Besides, you don't need to replace expensive tire pressure sensors every time you replace the tires. Discount Tire only recommends $6 TPMS rebuild kit when replacing the tires.