what do you mean by that?? if the phone is stolen or compromised, a thief cant track your car??

or do you mean if you report it stolen, YOU the owner cant track your car??? If thats the case i would see that as a massive negative if they stop me tracking MY car once its stolen. With a decent text response alarm and such a tracker, its likely the owner can respond with a friend far quicker than the police can. Retaking your own stolen car isnt a crime AFAIK.