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Model 3 completely dead this morning. What an experience. [dead 12v]

Well my issue seems to be worse than what I imagined. I selected roadside assistance from the app and selected ‘car won’t start’. A tow came 45 min later and jumped the frunk open, but couldn’t jump the main 12v battery after trying for 30 minutes. Next, Tesla mobile came by and put in a new 12v and still the car wouldn’t start up. Finally, another tow arrived and it was towed on rails just this evening. No idea what’s going on, but a new battery wasn’t able to wake up the car… I hope to hear more once the service center takes a look tomorrow AM. The car had 0 issues before this so this seems so strange and random.
Posted in another related thread, had same ordeal this past Friday, Tesla replaced the 12vbattery but it says that did not fix all issues so now waiting on further diagnostics.
Omg same thing just happened to my 2018 LR Model 3 on Friday - 2 wks after my warranty expired! Was charging my car overnight, when in the morning I got a bunch of back to back alerts saying my parking brake functions were degrading, my electrical system power was reduced & vehicle was shutting down, schedule service to replace my lv battery, and vehicle may not restart! So I immediately scheduled service for that morning and then went out to the car only to find it completely dead. I called roadside assistance and they were able to jump start the car and drive my car down my driveway to street level, load it to the truck and haul it to the service center. They replaced the battery but says that didn’t fix all the issues so further diagnostics are needed. I am wondering if the latest software update that was just installed a few days before the incident is what caused these problems? If so then Tesla should be fixing them on their dime! So far the estimate is only for the replacement of the battery at $130 but Im nervous waiting & dreading on what the final bill might be!!
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