My issue is slightly different than the recent MCU 1 failures so I wanted to get some feedback from the hive mind about what's the best course of action. I have a 2015 Model S 90D with about two weeks left on the warranty. In early October the LTE and WIFI went out - it had been flaky for about a month prior (wifi not connecting/showing no bars), but the LTE still worked so I chalked it up to a bug and bad wifi connection because I live on the third floor and the weather had sucked. After it fully went out the MCU reboots constantly and sometimes just won't boot to screen (staying black for 20-30 minutes, which is my entire drive). Service was convinced that it was an issue with a bad update, but the mobile tech: (i) couldn't do anything without a networking card and (ii) thought that the boot issues were related to it trying to spool up the networking interface and failing for the entire 20-30 minutes. I finally have an appointment to go into a service center next week, so I'm not worried about the LTE card getting covered under warranty. What's going through my mind is if this is really just the LTE card and not the MCU. Does anyone have any experience with this and could say one way or another? Just want to make sure I'm prepared with questions/to pushback before the service appt. I'm really just worried that they'll say it's just the LTE card and then the MCU goes out on me a month later when I'm out of warranty.