As mentioned by others, aitrag can be an interesting and cheap option to be able to find your stolen car.
But it needs a tweak to be effective
i like how the stalkers quickly worked out a way to remove the speaker lol
they are pretty cool, im not an apple user but i am sure i heard that if you have an iphone or apple device on you and one of these tags is following you that you will start to get notifications about the tag following you if it is not your tag.
if they have an apple device in their pocket they will be alerted about it.
android implemented this but i dont know if it alerts to the apple airtag.
my question would be that if people are using these types of devices for this reason then the crims will know that there is a high possibility they would encounter one so if they were to go about establishing the hacks for the vehicle security system wouldnt someone have made something to detect these types of tags or jam them.
they operate using bluetooth and uwb and there are lots of hacky tools for these protocols so it wouldnt be too hard for them to screw around with it.
still its probably better to have one then not have one and if it does alert them they might bail out of the vehicle and leave it instead of flogging it out for a day or two.