Air Tracker

Problem with an AirTag is the apps that people use to check for them. Because AirTags are used to maliciously track people and cars, there are apps to see if someone dropped one in your trunk at a show or stuck it to your car while you are away so they can "follow" you home and steal your car. So I would bet a thief would use the same app to make sure you don't have an AirTag in the car before they steal it and remove it when they do.

Seems like a better solution is one of those alarm systems that talks to your phone and tells you right away if the car is messed with or moves. I don't think there is a monthly fee for them either, but I could be wrong.