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12V battery must be replaced soon

RSS-X

Member
Aug 3, 2017
23
28
White Plains, NY
My Model X has about 11,600 miles, and is 15 months old. I have a wall charger, and when I went to unplug the cable this morning, I noticed that the charge port light was red. Never saw that before. I thought that maybe the cable wasn't plugged in all the way, but I didn't pay much attention. I removed the cable, and when I got into the car, I noticed a warning: 12V battery must be replaced soon. Software updates will not complete until serviced. The car drove normally, and when I returned home, I charged the battery for a few minutes to see if that would make a difference (I usually charge at night). It didn't.

I opened the Tesla APP, entered the required information, uploaded a picture of the error message, and expected to be able to get a mobile service appointment in the next few days. The appointment has to be at a Service Center, and the first appointment is January 19, 2021 - one month from today! I really don't feel comfortable driving for a month knowing that the 12V battery is on the verge of failing.

Any suggestions on how to get my service appointment expedited?

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Les236

Member
Jan 20, 2018
180
92
Kissimmee, FL, Boston, MA
I haven't had this issue yet after 2 1/2 years and 42,000 miles, but I know it is coming. I would call the Telsa support line, 877-798-3752. They may be able to help expedite. Because I am on trips a lot, I have one of the portable jumper packs similar to the attached photo which can be had from Costco, Amazon, Walmart, etc. in my car at all times, and of course I can also use it to assist any stranded ICE vehicles out there.
 

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RSS-X

Member
Aug 3, 2017
23
28
White Plains, NY
I haven't had this issue yet after 2 1/2 years and 42,000 miles, but I know it is coming. I would call the Telsa support line, 877-798-3752. They may be able to help expedite. Because I am on trips a lot, I have one of the portable jumper packs similar to the attached photo which can be had from Costco, Amazon, Walmart, etc. in my car at all times, and of course I can also use it to assist any stranded ICE vehicles out there.


Thanks for the suggestion. I called the support line, and while the person who answered was polite, they really didn't have any solution for me. He did say that typically the battery lasts about two weeks after you first get the notice. Too bad my appointment is one month away.

Subsequently I received a reply from my local service center. They are out of stock on the 12 volt batteries. As soon as they receive one, they will schedule mobile service. It would have been helpful if they gave me an ETA for the battery delivery.
 

RSS-X

Member
Aug 3, 2017
23
28
White Plains, NY
Some progress to report, but certainly not good enough. The local service advisor messaged me, and set up a tentative mobile service appointment for January 6, 2021, assuming that they receive a replacement battery. The guy on the Tesla Support Line (thanks Les236) told me that the battery typically lasts two weeks after the warning message is first displayed. That gives me a drop dead date of January 1, 2021. Am I supposed to drive the car as I normally do for the next three weeks, and wonder when the battery is actually going to fail? I asked for a loaner car, but I'm not optimistic. I'm really disappointed.
 

sacfan

Member
Sep 8, 2019
187
76
Sacramento
I haven't had this issue yet after 2 1/2 years and 42,000 miles, but I know it is coming. I would call the Telsa support line, 877-798-3752. They may be able to help expedite. Because I am on trips a lot, I have one of the portable jumper packs similar to the attached photo which can be had from Costco, Amazon, Walmart, etc. in my car at all times, and of course I can also use it to assist any stranded ICE vehicles out there.
I’m quite familiar with jumping batteries on ICE cars using the car battery size packs that I used to keep in my vehicle. I have used a friend’s small, truly portable battery packs like the one shown the last couple of times.

Is the process exactly the same on our Teslas as on an ICE? Obviously lifting the hood on the ICE is easier than removing the cover in the frunk to access the battery, but once you can see the Tesla battery is the process the same?

What “size”/amperage,etc portable battery pack is recommended for a Tesla? With an ICE the size of the battery pack needed is determined by the size of the vehicle and its engine (and battery).
 

jboy210

Supporting Member
Dec 2, 2016
4,969
3,042
Northern California
I’m quite familiar with jumping batteries on ICE cars using the car battery size packs that I used to keep in my vehicle. I have used a friend’s small, truly portable battery packs like the one shown the last couple of times.

Is the process exactly the same on our Teslas as on an ICE? Obviously lifting the hood on the ICE is easier than removing the cover in the frunk to access the battery, but once you can see the Tesla battery is the process the same?

What “size”/amperage,etc portable battery pack is recommended for a Tesla? With an ICE the size of the battery pack needed is determined by the size of the vehicle and its engine (and battery).

You don't need to remove the frunk liner to jump the car. Only to get access to the battery to replace it. There are jumper lugs. See this video.

 

sacfan

Member
Sep 8, 2019
187
76
Sacramento
You don't need to remove the frunk liner to jump the car. Only to get access to the battery to replace it. There are jumper lugs. See this video.

Wow, great to know. Thanks so much!

Is there a problem jumping other cars (ICE) from our Teslas or can I assume the process and precautions are the same as with two ICE cars?
 

DCGOO

Active Member
Nov 24, 2015
1,512
896
Indianapolis, IN
Some progress to report, but certainly not good enough. The local service advisor messaged me, and set up a tentative mobile service appointment for January 6, 2021, assuming that they receive a replacement battery. The guy on the Tesla Support Line (thanks Les236) told me that the battery typically lasts two weeks after the warning message is first displayed. That gives me a drop dead date of January 1, 2021. Am I supposed to drive the car as I normally do for the next three weeks, and wonder when the battery is actually going to fail? I asked for a loaner car, but I'm not optimistic. I'm really disappointed.

Operate the vehicle according to their suggestions (normally), If it fails before the battery is replaced, then you can use Emergency Road Service, even if it is in your driveway. You did everything you could, and followed their instructions. I specifically would NOT try to use any alternative means to bring the battery along. If it dies, it dies. But I bet you'll be fine. The two-week time frame for living with the error is just an estimate. It could be much longer (or shorter). As long as you use the car according to the suggestions made by SC staff, that is all you can do.
 
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ShawnA

Supporting Member
Nov 13, 2017
925
674
Edwardsburg, MI
Hi @sacfan,

You ask if it is OK to jump ICE cars from the Tesla - The answer is a resounding NO!
The Tesla X battery is very small and will not support cranking an ICE engine...

The Model X may be jumped from an ICE car as the Model X required current is low...

I had the Replace 12 Volt battery message in November 2020.
It was replaced by mobile service - The mobile service advice in setting up the appointment
was to use the car as usual - BUT if I smelled a sulfur smell - DO NOT USE the car.
That indicates a worse than usual failure...

Good Luck,

Shawn
 

Stin121

Member
Jan 15, 2020
44
23
Baltimore
I just left my my SC this morning for the same issue. They confirmed the appointment yesterday, but upon arrival this morning, they stated they didn’t have a battery. Couldn’t they have canceled the appointment before I drove there?

I was told there were 300+ in AZ, and they will try and get one soon.

I am most frustrated with the fact that they just replaced mine in Aug.

I scheduled a mobile service for early Jan.
 

RSS-X

Member
Aug 3, 2017
23
28
White Plains, NY
Stin121, sorry to hear that this is your second battery failure. Were you able to get any feedback after the first replacement as to the cause of the failure? I wonder how common this problem is. Latest word from the Mt Kisco, NY SC is that a shipment of batteries is due in on January 5, 2021. My mobile service is scheduled for January 6, 2021. While driving today the GPS didn't know where the car was a few times. Then, the system decided to re-boot, and I'm driving along with blank screens! I don't know if that's related to the 12volt battery issue or not, but it's not the usual fun feeling driving the X with this problem.

Very disappointed that replacements aren't available for immediate service.
 

Stin121

Member
Jan 15, 2020
44
23
Baltimore
Stin121, sorry to hear that this is your second battery failure. Were you able to get any feedback after the first replacement as to the cause of the failure? I wonder how common this problem is. Latest word from the Mt Kisco, NY SC is that a shipment of batteries is due in on January 5, 2021. My mobile service is scheduled for January 6, 2021. While driving today the GPS didn't know where the car was a few times. Then, the system decided to re-boot, and I'm driving along with blank screens! I don't know if that's related to the 12volt battery issue or not, but it's not the usual fun feeling driving the X with this problem.

Very disappointed that replacements aren't available for immediate service.
I purchased used in April, so I wasn’t shocked about a replacement in August. I did have the MCU upgraded in June, that might be the issue? I asked today if they ran diagnostics. They stated that they did, and found nothing wrong. I was told that maybe the battery that was installed in August wasn’t fully charged when they installed it. I was under the assumption the car charge the battery in order to keep it full, but she didn’t want to give me an answer to my question. My mobile service is scheduled January 7, so hopefully they have one in stock by then.
 

RSS-X

Member
Aug 3, 2017
23
28
White Plains, NY
The Mount Kisco, NY Service Center received their shipment of 12 volt batteries yesterday (Tuesday, January 5, 2021), and my battery was replaced by mobile service this morning. Matt, the service tech, was friendly, efficient, and professional. The replacement took about 20-30 minutes, and was done under warranty. I would have felt more comfortable if the battery would have been replaced a day or two after I received the warning. Driving for three weeks knowing that the battery is on the verge of failing isn't fun. OTOH, with an ICE car, I guess I wouldn't have even known that the battery was going to fail. I appreciate that Tesla monitors the battery health, and provides warnings when something isn't right. Thanks Matt and Tesla.
 
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