 They say the primary causes for vehicle thefts are cars that are unlocked and those with a key or fob left inside. The best ways to prevent vehicle thefts are to close and lock all windows and doors, use an anti-theft device, park in well-lit areas, and never leave the area when your vehicle is running. Maryland experienced a significant increase in vehicle thefts from 2022 to 2023, due in large part to Kia and Hyundai thefts.