How do I find an AirTag on my car?
0:321:33How to locate an unknown AirTag moving with you on iPhone – YouTubeYouTube
How do I stop AirTag from tracking?
However, you can at least opt yourself out, though this removes your ability to track your own lost or stolen iPhone, iPad, Apple Watch, Mac, or an AirTag through this extended network. In iOS 13 or iPadOS 14 or later go to Settings > account name > Find My > Find My iPhone/iPad, and disable Find My network.