Here is video of how to create inexpensive car tracking system.
It cheap an ingenious simple.
You will need old but functioning cell phone or prepaid phone, car charger, creativity and probably some long wires.
You connect cell phone to the car battery via car charger and hide it on place where it will have connection to cell towers.
Then when you car is stolen you can give cell phone IMEA number to authorities and with the help of your cell phone provider they can easily trace current car location.