I Bought my Nitro in 2018. 3 of the sensors worked and the 4th blinked on and off. I put new tires on the back and asked them to check the back passenger one when they put my new tires on. I guess they didn't. Later I had 2 front ones put on at walmart and asked for them to be checked out too since I would assume when new tires go on that would be the time to check them right? I guess they didn't . Now none of them work.