Comment by nullc

Makes it less likely to connect presumably, but at least on some cars it will sometimes, rarely manage to get out-- and of course it'll upload its queued data if it can. (In particular I know of someone where a GM car managed to get data onto the Lexis Nexis report with the antenna disconnected-- now with their FTC settlement its harder to tell if its still getting through, unfortunately).

Or if you take it in for service and they plug the antenna in. Better than nothing, but if your privacy and security depends on not being constantly tracked it's not good enough.