The relearn should take care of it, especially if it's just one tire reading blank. The TPM battery life is around 7-10 years. I wouldn't let them tell you it needs a sensor. JMI
True Robby, you have a point there. I've seen stranger things happen in our shop.Agree with the seven to 10 year thing but you never know how old they were when the tire/wheel were assembled........same as the cars battery.....never know how long it sat on a skid before installation.
Like I said though....I'm already running into 11's not signalling strong enough for the receiver to see it.