Low voltage warning again - 12 v battery was replaced last month

[mostvisited]

Hi All,

I have a MX 2020 model bought in Dec 2019. This year I finally got a 12v battery warning in July , Tesla came and replaced it. Got same warning again in Oct and Tesla came and replaced. Now again I am getting the same warning. Have a mobile appointment scheduled to get it replaced. Wondering what is causing this frequent 12v battery issues. Its 3rd time in less than 6 months. I have not plugged in anything ( other than USB to store dashcam clips and rare cell phone charging while driving) so not sure what is draining it all the time. Its not that cold also . Did anyone faced this issue before ?

 

[islandbayy]

Tesla basically "cooks" the 12v. Over-Charging them. Each and every one I've replaced on both my Model S and X as well as a number of friends vehicles, has been boiled bone dry. The Model X is much more heavily reliant on the 12v through than the S due to additional power Hungary options (Falcon Doors).

Finally switched to the Ohmmu batteries, and not a single problem since going on over a year. The longest lasting were the original factory installed, those lasted almost exactly 4 years in both vehicles, then each replacement has lasted 1 year or less ever since. Got fed up with it and just got the Ohmmu.
I just need the Ohmmu's to last 2 years to break even VS the Tesla OEM batteries. Ohmmu has a 4 year warranty, which I have not needed.

 

[wwu123]

Hi All,

I have a MX 2020 model bought in Dec 2019. This year I finally got a 12v battery warning in July , Tesla came and replaced it. Got same warning again in Oct and Tesla came and replaced. Now again I am getting the same warning. Have a mobile appointment scheduled to get it replaced. Wondering what is causing this frequent 12v battery issues. Its 3rd time in less than 6 months. I have not plugged in anything ( other than USB to store dashcam clips and rare cell phone charging while driving) so not sure what is draining it all the time. Its not that cold also . Did anyone faced this issue before ?

Was it covered under warranty the 2nd (and 3rd) time?

My mother's M3 12v was replaced 18 months ago by Tesla service, and now the car is giving a 12v battery alert once again. The original 12v was covered under the Vehicle Warranty since the car was only 3 years old then, but I've read around these forums that outside of that, replacement 12v batteries have a warranty of 12 months, or 30 months, or nothing at all..

 

[mostvisited]

Was it covered under warranty the 2nd (and 3rd) time?

My mother's M3 12v was replaced 18 months ago by Tesla service, and now the car is giving a 12v battery alert once again. The original 12v was covered under the Vehicle Warranty since the car was only 3 years old then, but I've read around these forums that outside of that, replacement 12v batteries have a warranty of 12 months, or 30 months, or nothing at all..

Yep it was replaced under vehicle warranty. One of the mobile technician mentioned that there would be 6 month warranty if it fails again while other one mentioned 1 year. Guess I would know next year as my car won't be under warranty. Better check with the SC , doubt they would consider 18 months though.

 

[Only Trons]

Interestingly, my 2016 X (delivered Oct 2016) still has the original 12v battery. Never expected that.

My 2013 Tesla is on its 3rd 12v battery. I don't have the records with me at the moment, but I believe the first one failed about 3 years after delivery. Tesla replaced it. Second one started to fail about 3 years after that. I made an appointment for Tesla to replace it, but there was a shortage of batteries and my appointment was rescheduled several times. I was afraid of getting stuck somewhere so I purchased an Ohmmu battery and installed it myself. The Ohmmu battery has been in place for a little over 4 years with no problems to date.

Replacing the 12v battery in a 2013 Model S is a real challenge though!