Yes, a car can be stolen without its physical keys. Modern vehicles are often targeted using sophisticated electronic methods that exploit wireless key fob signals. The most common technique is the Relay Attack, where thieves use devices to amplify the signal from a key fob inside your home to unlock and start the car parked outside.
This threat primarily applies to keyless entry and push-button start systems. Thieves use two small electronic devices. One device is placed near a house window or door to pick up the weak signal from your key fob, even through walls. This signal is then "relayed" to a second device held near the car, tricking the vehicle into thinking the key is present.
Beyond relay attacks, other methods include:
- Signal Jamming: Using a device to block the signal when you lock your car with the fob, leaving it vulnerable.
- OBD-II Port Exploitation: A thief gains physical access to the interior (e.g., through a broken window) and connects a hacking tool to the On-Board Diagnostics (OBD-II) port, typically located under the dashboard. This allows them to program a new key on the spot.
- Key Programming: If a thief can access the vehicle's computer, they can sometimes program a blank key fob.
| Security Method | Effectiveness Against Relay Attacks | Cost | User Convenience |
|---|
| Faraday Pouch (Signal Blocking Bag) | High | $10 - $20 | High |
| Steering Wheel Lock | High (Physical Deterrent) | $30 - $100 | Medium |
| GPS Tracker | Low (Prevents theft) / High (Aids recovery) | $50+ & subscription | High |
| Deactivating Keyless Entry | High | $0 (if feature exists) | Low |
The most effective protection is a layered approach. Store your key fobs in a Faraday pouch or a metal container to block signals. For a strong visual deterrent, use a traditional steering wheel lock. Always physically check that your car is locked by pulling the door handle after using the fob.
