No system can prevent theft by a pro, or if the thief loads up your car. No alarm system will prevent breaking glass or vandalizing. Almost every time I drive downtown I see someone smash in bright daylight, with people and even cops nearby, windows of parked cars, stealing whatever is visible on the seats and dash. Nobody gives a hoot if an alarm goes off. Someone might throw something at your car if the alarm goes off under someone's bedroom window.
My factory alarm includes:
- starter disabler/coded key
- motion sensor in passenger compartment
- contact sensors on all doors, trunk and hood
No incident in 13 years. *knocks on wood* I attribute that mostly to not leaving any attractive items in the passenger compartment.
