A car alarm is as an audible security system that activates when it detects a possible break-in. But these can create a noisy disturbance which is annoying, often a false alarm and so, often ignored. There are far more technologically sophisticated vehicle security systems currently available.

To help reduce the billion-dollars of car theft, manufacturers have developed innovative technology with two-way communication remotes to warn you when your vehicle's engine is started and notify you why the alarm was activated. The most common options in newer car security systems include glass break sensors, a two-way communication remote and passive arming.

If you are away from your vehicle you will not hear an audible alarm, and if you are on vacation it might be days before realize your car is missing from the garage. Many vehicle security systems will automatically call a phone number you have programmed or send a text message to notify you of a break in. The two-stage automatic car alarms can inform you if your car has simply been bumped or if the engine is running and car is moving.

While the vehicle is moving you can use the automatic car alarm to turn off the fuel pump, this is an effective way of bringing the vehicle to a stop. However, if your car is on a tow truck this won't make any difference in stopping the theft from occurring. Many of today's new vehicles also come with GPS tracking, which allows you to know where the vehicle is at all times.

Keeping Car Jackers at Bay: Many vehicle alarm models come with a built-in anti-car-jacking mechanism, which allows you to cut the gas by just pushing a button. The switch is generally nearby the seat belt release, and once pressed it will cut off the gas and put on the brakes to bring the vehicle to a halt. This puts you in control when a dangerous situation might have made you a victim. Having this system means that you can be proactive in making sure that your car is always safe from being stolen.

Often these systems will alert police in the event of a car jacking. Most systems are intended to quickly notify authorities that something is happening and can be invaluable in life-threatening situations. Approaching a car thief in the middle of stealing your vehicle can be very dangerous. It is better to let law enforcement handle the situation. Once your automatic car alarm informs you with a phone call or text message that the car is being stolen, you can notify the police, who will have a head start on catching the thief in the act.