I once read an article many years about how arsonists were burning expensive cars in Berlin. The journalist indeed reported that they would light barbecue starters under the tires.

If I recall correctly, they would even place it a little bit further under the car (i.e. not the outside) so that any passerbys wouldn’t notice anything until the tire was properly burning.

This was before Tesla’s though, which have a sentry mode

With the more recent cases, I have read that they smash the windows and throw Molotov cocktails inside, but I think that would draw a lot of attention and make alarms go off.

On the other hand, I think this method might have less risk of the sentry mode filming.