Tesla Model 3 (2017-2022) - New 12-Volt Battery Install

Learn how to install a new 12-Volt battery in a Tesla Model 3. We’ll show you how to replace/change/remove with simple tips and tricks to help get you started!

Tool List: 10mm wrench

Although this video may provide you with the basic procedures for replacing the 12-volt battery in this Tesla Model 3, we recommend that you check with the vehicle manufacture's step by step instructions found in service/repair manuals for the vehicle you are working on because some year/model procedures may be different than the vehicle in this video. This vehicle does not require battery registration ("coding").

Always wear safety glasses and gloves when working with or near batteries.

[bobuk]

Hi, this is a masterclass in how to present a maintenance job. Clear and precise instructions given in the right order and with useful hints and tips along the way.

[apl]

Had to do this in the airport long term parking lot after leaving the car for two weeks and it started saying the 12 volt battery was failing while I was away. With the help of a friend meeting me at the airport and this video - we did the battery swap in less than 5 minutes.

[K_Games]

Excellent, helpful video. Swapped my battery in less than 10 mins following this tutorial, the only thing I had was a message saying that some functions couldn’t be supported by the battery once I had swapped it, at first I thought the battery wasn’t correct but then the message disappeared and I haven’t seen it since

[TimShields]

Thank you! My car told me it needed a new battery 2hrs before I had to drive 200 miles to an airport. Fortunately got it replaced in time!

[marklui]

Wow! Just changed my 2018 M3P 12v Battery last night and followed this video. Perfectly describes how to do this. Thanks!

[TheJDeuce]

Wifes Model 3 died on her battery wise it seems, so we needed to replace. Called Tesla and we picked a 12V battery up for $85. Found this video and turned it alive again! Thanks for posting this!

[slick-riq]

Thanks for putting this together…. Got the 12V alerts for the first time and did a search and this video popped up, super helpful!

[ryanfloyd]

Great video! Very informational, well edited, easy to follow. Thank you!

[Patriot]

Apreciate the video. Woke up on vacation today and had this warning. Watched this video then called around to find out there wasnt a tesla batterry in montana. A kid at orielys auto parts said it was a group 51 battery in size and spec. They carry that battery and i installed it in 5 minutes in there lot. Super easy. Remember group 51. 189$ lead 250$ AGM

[jclark]

Followed the video and successfully swapped my 12v, thank you!!

[Turtle]

I am accepting delivery of my 2021 Tesla Model 3 this weekend! I am excited, and I want to make sure I know what to do.

[afimbrez]

Thanks for this step-by-step video. Who knew that each Tesla had a regular battery that runs all the controls? Our battery died, the car was bricked. I figured out it was the 12V battery by connecting a tender charger and the car came to life again. So we bought the replacement from Tesla, not bad, price was $85 + tax, but they dont share this information to properly clear the 'Electrical system is unable support' message.

[castaomar]

Thank you for making this install simple!

[ernestonavarro]

I just replaced mine following this video. Well done you guys and Thank you!!!

[autosri]

Great tutorial. Easy to follow, straight to the point.

[francisantonelli]

If the 12V battery is completely dead, can I just install the new one without disconnecting the HV connector? Or do I need to jump it first and then follow the steps in this video

[mikesyl]

Great video. Used it today step by step. Picked up an EV battery from Advance Auto. All set now. Thanks for the walk thru.

[TheresaUllrich]

Great video! Very easy to follow and the install went perfect! Thank you!

[sjonny]

Super video. Just finished doing it and followed the video while doing. Thank you for sharing.

[dfgriggs]

Thanks for the well done video. I was surprised that apparently Tesla doesn't suggest you use the software power down before disconnecting the two batteries, but obviously the given procedure works without it

Controls / safety / power off