Anti-theft devices are not foolproof, but they can stop the amateur and slow down the professional. The longer it takes to steal a car, the more attention the thief attracts, and the more likely the thief will look elsewhere. Anti-theft devices include those listed below.
Kill Switch: The car will not start unless a hidden switch is activated. The switch prevents electrical current from reaching the coil or carburetor. Please check your warranty before installing one of these switches. Some warranties prohibit installation of these devices, and doing so nullify the warranty. In such cases, there is a possibility that a starter bypass switch could be used without affecting the warranty.
Alarm Systems: These systems contain a device that will activate a siren, lights, or horn if the car is tampered with. Consider a backup power source for the alarm, as professionals could deactivate the alarm if they get to the power source. Keys or code numbers to the alarm should never be given to parking lot attendants or valets. (Do not try to fool a thief with an alarm decal when no alarm exists.)
Fuel Switch: This device stops the fuel supply.
Armored Collar: This equipment consists of a metal shield that locks around the steering column and covers the ignition, the starter rods, and the steering wheel interlock rod.
Locking Gas Cap
Crook Lock: This lock is a long metal bar that has a hook on each end to lock the steering wheel to the brake pedal.
Chain and Lock: These devices should be used to secure motorcycles and motor scooters.
Keyless Entry System
Anti-theft devices may cost a few dollars to several hundred dollars. Many of those devices are now standard or optional equipment offered by auto manufacturers.