On the Dodge they broke the side back glass and slithered into the back. Since the car has no interior motion abilities, the alarm system never activated even though the vehicle is armed. Criminal can move around worry free, and create a clone key and drive off in less than 5m.Jaguar Remote app connectivity is OK but if they cut your antenna cable...
First question is, can they steal a Jaguar without a key fob? No idea, but it doesn't seem likely. The British are pretty serious about their immobilizers.
Second question is, can you put an aftermarket system in a Jaguar. If you look at Compustar's website, the answer is NO.