All mine were made in 2019. I had trouble buying MOPAR parts, I think the date stamps were too old. I suspect Chrysler stopped making them in 2014 or earlier as they have a 10 year shelf life. Half of the MOPAR parts didn't work and I sent the batch back, assuming the 2 that worked would soon fail as well. Happy with it and hope to live another 8 years (and car too!) Must use TPMS magnet to get them to learn. Each of them takes about 3 seconds to sync.