While a good alarm system or a tracking device is an effective way to thwart thieves, simple common sense is often the best way to avoid becoming a victim of auto theft. Approximately 50 percent of all stolen vehicles were left unlocked. Take your keys. Nearly 13 percent of all stolen vehicles had keys in the ignition. Never hide a second set of keys in your car.
Thieves know all the hiding places.
Park in well-lit areas. More than half of all vehicle thefts occurs at night. Park in an attended lot and leave only the ignition and door key with the attendant. Never leave your car running unattended. Don't consider this even if you'll only be gone for a minute.