
Yes, a Tesla can be used to jump-start another car with a dead 12-volt battery, but the process is different and more specific than with a traditional gasoline vehicle. The key is to understand that you are not using the car's massive high-voltage traction battery; you are only using its standard 12V battery, just like in any other car. Attempting to connect jumper cables directly to the main battery pack is dangerous and can cause serious damage.
The safest method involves using the jump-start terminals located under the front frunk's plastic cover. This is the designated access point for 12V power. The general steps are:
It's crucial to consult your Tesla's owner's manual for the exact procedure for your specific model (Model S, 3, X, or Y), as locations can vary. There are risks, such as potential voltage spikes that could damage the Tesla's sensitive electronics. Using a portable jump starter is often a safer and more recommended solution for helping other vehicles.

I’ve done it once with my Model 3 to help a neighbor. It works, but it feels weird. You’re not "starting" the Tesla like a regular car; you just hook up the cables to these specific posts under the frunk while the car is asleep. The manual makes a big deal about connecting to the right metal bolt for the ground. It got their SUV going, but I’d be nervous about doing it often. A little pocket-sized jump pack is probably a better tool for the job.


