I just got the "Fuse Alert" and scheduled an appointment with Tesla. The estimate for the fuse replacement was $213.00 but upon inquiry Tesla service responded that the item on my 2016 Model X 90D was covered under the 8 year 150,000 warranty. I just checked my messages again and the quote has now been changed to $0 with a note thats its a warranty item. Whew, dodged the bullet on that one!! (and if anyone is wondering, the pyro fuse in the main battery apparently has a small "Ignition battery" that fires the fuse. In the new pyro fuses that little battery is being eliminated, so newer vehicles shouldnt be getting this alert!)