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2018 X 100D Dead Battery

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2018 Model X 100D, with 90,000 Miles. Only have Charging History from 2022 on the app. Most of the time since New was over 80% is Home Charging.

in2022 88% Home, 11% Supercharger.
2023 81% Home, 18% Supercharger
2024 82% Home, 16% Supercharger

on 6-04-2024, around 8am the vehicle will not go to D / in Gear. My basic warranty is over, road side wanted to charge me over $450 to tow it to nearest service center, 3rd Party 1/2 the cost. I got error

PM_w04_dasMIA
GTW_w405_12VNotSupported
BMS_w177_OpenVshDetected
BMS_f071_SW_SM_TransCon_Not_Met
DI_w166_hvilOutOfBounds
DIS_w166_hvilOutOfBounds

Service Center Quoted $515.11 to replacement the Low Voltage Battery. I was not going to pay $500 to change a battery that I could DIY. When the vehicle was towed to the service center. I check the voltage of the battery while the car was on, I got over 14vDC, when vehicle was off, I was getting 13v to 12vDC.

I never got a message to replace the 12v, the 12v was replaced couple of years ago under warranty when the message came up.

Tesla service Tech replaced the 12v, was able to get the vehicle to drive in the garage/lift. soon after that the new 12v battery have issues. they did more diagnostics which I had to paid 1hours before any work will be done. they found stated the HV battery have to be replaced, Reman HV battery on order.


From the service menu, my battery pack is still showing green with 70%. Since with latest software updates, I cant find where you could run a HV battery test.
 
Got my Reman 100KWH replacement completed on 6-11-2024, Part# 1107679-02-A and 12v 1046200-10-C replaced under battery warranty. Was at Chicago Elston Service Center. Tesla found that a harness in the battery is defective, that cause the low voltage issues from the HV battery (that is what the service advisor stated).
 
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