my alarm kills my fuel pump and ignition unless its properly deactivated...... you can also purchase a clutch lock that locks your clutch in the down position.... those work very nice.... they can still tow your car off.... but if they're really gonna take, they're gonna find a way anyways..... but thats what the lojack is for.... most people are luckier and dont live so close to mexico though..... once a car gets across the border..... its gone for good unless it happens to reappear in the US and still have the right vins..... in mexico if they have your registration paper thats as good as an actual title on the car.... whoever holds it owns it....