Car Alarms & Security
From simple noise-makers to sophisticated systems with GPS tracking, cellular alerts, and insurance-verified theft protection. Modern car alarms integrate with the vehicle's CAN bus for comprehensive security.
Early Car Alarms
The first car alarms were simple electromechanical devices that sounded a horn when a door was opened without a key. These basic systems triggered easily from vibrations, weather, or animals, leading to the nickname "whining neighbors" for constantly chirping alarms.
Modern Alarm Systems
Contemporary car alarms are sophisticated systems integrating multiple sensors connected to a central control unit. Modern systems monitor:
- Door/Trunk/Hood: Magnetic reed switches detect unauthorized entry
- Shock Sensors: Detect impacts from breaking glass or attempted entry
- Tilt Sensors: Trigger when vehicle is jacked up or towed
- Motion Sensors: Detect presence inside the vehicle
- Glass Break Sensors: Acoustic sensors that detect the frequency of breaking glass
LoJack and GPS Recovery
Introduced in 1986, LoJack revolutionized vehicle security by combining a hidden transmitter with a nationwide recovery network. When a vehicle equipped with LoJack is reported stolen, the system activates a silent transponder that police can track using their own tracking equipment. Recovery rates exceed 90% for equipped vehicles.
Immobilizer Integration
Modern alarms work in conjunction with engine immobilizers. If an unauthorized entry is detected, not only does the alarm sound, but the engine may be prevented from starting. The immobilizer cuts power to the starter or fuel pump unless the correct transponder key is present.