I’m guessing even if it’s off warranty, they might cover it cause they knows there are a few bad ones out there. Worth checking if you are off warranty, but you may have to twist your dealers arm to put it in a claim. Worst case, they deny it. If you have a good dealer, they should put in a claim/talk to rep without arm twisting.
There are a bunch of the 18's and some 19's that have faulty main gauges, mine did an the guys down at my dealership replaced it for me. Hope this helps.