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Interesting read. Trying to recall how I got along without TPMS for over 60 years. Do have a tire pressure gauge with NTIS traceable accuracy, for more accurate than this crap made in China and doesn't even have a battery. Could write your congressman since they made this law.

Never found a tire dealer yet that can accurately fill your tires. And if you do have a low tire on the road, where can you get air? Dealers have bankers hours, very few convenience store gas stations offer it. Good to carry a portable air compressor and a tire gauge you can trust.

Changing TPMS Sensor Batteries
 

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Batteryless technology is not actually a new science, we were using this way back in the 70's, send an RF signal that was rectified and filtered with a capacitor that would fire up the circuit, let it do its thing, then fire the data back to the receiver.

Not only was it far more reliable, but much cheaper and took a lot less space, that battery was the most single expensive item and took up the most space. And also required the most maintenance, but they solved this by yet another throwaway part.

Here's another tip form an old timer if you pay to get your tires rotated, put a chalk mark on each tire, and when done, this tell you if the correct rotation was followed or even if your tires were rotated at all. After its done, check each lug nut with your own torque wrench. Not too common today, but use to use 500 ft-lb impact wrenches to tighten the lugs, you would never get them off again if a stud wasn't broken.

But everyone I checked could find over a half a dozen that were loose. Ha, the same thing about putting a hair on your oil filter to let you know if it was actually replaced.
 
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