Originally Posted by KPierson

Most OEM systems have to compromise between overall security and false alarms. No one wants to own a car with an alarm that goes off all the time.

Everytime you add a sensor you greatly increase the chance of a false alarm. Motion sensors are notoriously bad for this, and I've never actually seen a car that had a motion sensor installed on the assembly line. Was the motion sensor a dealer add on?

Originally Posted by LjN_728

I installed an aftermarket shock sensor myself and it works like a charm. Depending on the sensitivity level, a knock on the window will set the alarm off.

http://www.autotechs.com/items/item1081.htm

Originally Posted by LT1 SS

If the hood, doors, or trunk are opened while the alarm is armed it will go off. If someone breaks a window or smacks into your car the alarm won't go off.

Originally Posted by virtualbong

Does it have decent instructions on what you have to do or can you write something up for people here? I would love to install something like this on my car. The second night I brought my car home, some focker threw a trash bag full of crap on the hood of my car. I want them to be scared ****less the next time they try this.

Originally Posted by Conscons

so when the windshield is broken? will the alarm go on??