Tesla cars are a hot topic, so some unknown crypto news sites try to get traffic from showing such news.
These cars have a problem with the storage memory, so downloading about 200 GB will be a waste of time, in addition to not having to manage a full node wallet (you can use it with SPV wallets or without download full Blockcahin.
Again, the news is to get more views.
In reality it isn't much different from using your raspberry pi in a car, and that might actually be better than hacking the infotainment system. I know that in the Model S this is separate from the basic car functions and this might also be true in the model 3. But remember the model 3 only has one single screen for everything, the driver needs this to be working at all times without glitches.
Of course as with running on any embedded device with flash storage, perhaps a "full node" doesn't make any sense. I also don't know if the Tesla can use wifi, i know it uses mobile data. There is also a secondary (hidden) mobile data link the company uses for telemetry, which is probably not in the infotainment side.
If the infotainment can use wifi, the 250+gb download isn't an issue, but it should be trimmed just like you would in a raspi. Forget full nodes, and using rotating drives in a car isn't a good idea and i doubt spending in a 500gb thumb/sd/ssd is worth it, just leave the full node running in your home.
Then again you will not notice much advantage in running a node in your car's infotainment system. Its cool but meh.