Install the best type of alarm you can afford, such as silent alarms, sound discriminators, motion detectors, and computerized tracking transmitters. External and internal hood locks also protect the battery from being stolen. Other forms of disabling devices include an ignition kill mechanism which interferes with the ignition system even if the car is hot-wired, and a fuel cutoff device which shuts off the fuel after running for a few seconds. Carry a card in your wallet listing your license plate number, VIN, engine type, and body style of your car. Report them to the police quickly should your car be stolen.
Speed is essential in recovering stolen cars.