Check your owner's manual to see if your car has a factory reset feature, which will wipe out stored settings and data. In particular, the FTC cautions that the factory reset, if available, might not wipe the car quite as clean as you'd expect. Although most of Guardian Data Destruction's services are available across the country, Clear My Data is currently available only in the New Jersey metro area. A rental car is a good example. If you plug your phone into a rental car's USB port, pair a device via Bluetooth or use the car's navigation system, the car almost certainly stores some of your personal information.