They ALL have SOME anti-theft (the PATS system), Many (like my '04)have a simple anti-theft that alarms(theoretically) if doors are opened WITHOUT the key or remote...
Kinda a FWIW system, since busting a window for example won't set it off....
Luck!
P.S. - if you have a little red light that flashes on the dash when it's off, you have the stock "basic" anti-theft...