A shock sensor detects an impact to the body of the vehicle, such as someone hitting a door panel. It helps protect the body of your car plus will act as a warning to a potential thief that an alarm is fitted (thieves will often whack the vehicle to test if it has an alarm).
Similarly one may ask, how does alarm system work?
Open spaces inside of homes can be secured with motion sensors. When a door or window is closed, the two parts of the sensor are joined together, creating a security circuit. When the security system is armed at the control panel, these sensors communicate with it by reporting that the point of entry is secure.
Do all cars have an alarm system?
Most new cars come with key fobs that can be used to lock and unlock the doors, but that doesn't mean the vehicle also has a security system, let alone an alarm. Although OEM alarms are relatively rare, many new vehicles do come equipped with a variety of security features.
What is an alarm in a car?
A car alarm is an electronic device installed in a vehicle in an attempt to discourage theft of the vehicle itself, its contents, or both.