How does a car's anti-theft system function?

@kaylie 

A car's anti-theft system is designed to prevent unauthorized access to the vehicle and protect it from theft. The specific functionality can vary depending on the type and level of security system installed in the car, but here are some common features and mechanisms used in anti-theft systems:

1. Keyless Entry: Most modern anti-theft systems use a keyless entry system, which requires a specific electronic signal from the key fob to unlock the doors and start the engine. The key fob contains a small radio transmitter that communicates with the car's system.
2. Immobilizer System: Many cars have an immobilizer system that prevents the engine from starting unless the correct key or key fob is present. The immobilizer module sends a unique code to the car's computer system, which verifies the key's authenticity before allowing the engine to start.
3. Alarm System: Cars often have an alarm system triggered by unauthorized access or intrusion attempts. The system may include sensors such as door sensors, motion detectors, or glass break detectors. If an unauthorized attempt is detected, the alarm system will activate, producing loud sounds, flashing lights, and sometimes disabling the vehicle's engine.
4. GPS Tracking: Some anti-theft systems incorporate GPS tracking technology. In case of theft, the system can track the vehicle's location through GPS satellites and relay the information to the owner or a monitoring center, increasing the chances of recovery.
5. Steering Wheel Locks: Physical steering wheel locks, such as a steering wheel bar or a lock that attaches to the steering column, provide a visible deterrent to potential thieves and make it difficult to steer the vehicle even if they manage to start it.
6. Electronic Security Systems: Advanced anti-theft systems may include additional electronic security features like vehicle motion sensors, engine cutoff, or biometric identification systems, such as fingerprint recognition, to provide an extra layer of protection.

Overall, anti-theft systems aim to deter thieves, prevent unauthorized access, and protect a car through a combination of electronic, mechanical, and alarm-based mechanisms.