12V Battery Replacement Notice

[HookBill]

I just received the notice that my late 2016 X90D 12v battery requires replacement soon. I would like to know from those who have experienced this how long you can drive until the battery completely dies and the car loses some functionality. I have searched the forum looking for an answer but could not locate an answer to this particular question. I scheduled an appointment for replacement with Tesla but their next Mobile Service tech is not available for two more weeks. I do have a backup vehicle (F150) but would prefer not to use it as it does not accommodate car seats.

 

[ucmndd]

2 weeks should be fine.

 

[PaulusdB]

I managed to drive around with that message in front of me for two and a half months in 2017. This month I got the replacement done by a Mobile Service technician after three weeks of the same.
You're fine.

 

[HookBill]

Fantastic. Thanks everyone. I hope this helps others in the future.

 

[animorph]

On the other hand, I don't think you just lose "some" functions if 12V dies altogether. It powers the contactors to connect the main battery to the rest of the car, so no 12V is a dead car. Should be OK while driving, but may not turn on after you leave the car.

 

[Silicon Desert]

I managed to drive around with that message in front of me for two and a half months in 2017. This month I got the replacement done by a Mobile Service technician after three weeks of the same.
You're fine.

I don't know about that. On my sister's 2016 MS, she called support and they said they like to get to it within a week although they quoted same as other poster above that 2 weeks should be fine. By they time they got to sister's home 5 days later, the car was undriveable. So I guess it would depend on the state of the battery.

 

[neroden]

I was told you've got 4 weeks usually. Occasionally it's in worse condition and dies suddenly as Silicon Desert experienced.

 

[.jg.]

Just don't let the main battery get too low (definitely not below 20%) and it will have enough to keep topping up the 12v battery. For the same reason, keep the car plugged into the mains supply when at home/overnight.