GPS Tracking

Locks and such are only meant to keep honest people out, if someone wants something bad enough they will get it, there are a few companies on the market but the one ive heard for the longest time is lowjack. Others may have more experience with those systems, also if not already installed you could install a kill switch thats hidden, or install a removable steering wheel, no matter what you do it still wont be steal proof, but 99% of thefts can be prevented by simply locking the doors and having a alarm indicator light flashing. Also make sure your insurance appraisal is up to date