AirTags won’t work for any thief that has a modern phone
Both android and Apple phones will alert you that an AirTag that is missing its paired phone is following you
And then you get a prompt to make the AirTag chirp so you can find it
So the thief knows the vehicle has an AirTag on it very soon
This behavior is to limit AirTag use to tracking unsuspecting victims
AirTags are for finding your keys or wallet
-s