These things are useless. Eventually I started using them and only 2 out of 4 worked correctly with TPMS. We used 2 different Snap On TPMs tools to reset them 6 times and still only 2 new sensors worked. Since I've been with Firestone I've had to pay over $30 each for new ones to replace the 2 that DID NOT WORK. Sorry if I'm picky here, but I was very frustrated that all the TPMS sensors weren't working properly.