The National Insurance Crime Bureau reports that more than a million cars were stolen in 2022, marking the highest number since 2008. A significant contributor to this increase is keyless car theft, which takes advantage of the fact that many wireless key fobs constantly transmit an “unlock” signal.

Car thieves often exploit this vulnerability using a method called a relay attack. In this technique, criminals use an antenna to intercept the key fob’s signal, amplify it, and unlock or start the vehicle—even from a distance where the key would not normally function. This process can take less than a minute and is most effective when the key fob is kept close to the vehicle, such as near an exterior door.

Any vehicle equipped with keyless ignition technology can be at risk. Typically, these systems feature a “Start-Stop” button instead of a traditional key slot. Although automakers have introduced enhanced security measures—like motion-sensing fobs that stop transmitting when stationary—many systems still have vulnerabilities.

Vehicles parked near the home but not secured in a garage or behind a gate, such as those left in a driveway or on the street, are especially at risk. The danger is elevated for those who keep their car keys close to their parked car, for instance in a room adjacent to an exterior driveway.

Fortunately, there are several practical steps you can take to significantly decrease your chances of falling victim to keyless car theft:

Invest in a signal blocker: A simple and affordable way to deter thieves is to use a signal-blocking bag to store your key fob when it’s not in use. These bags are made from conductive metal mesh that prevents electromagnetic signals from being transmitted. Making a habit of placing your key fob inside such a bag at home can drastically reduce your risk.

Check your vehicle settings: Some vehicles allow owners to disable certain keyless features, including entry and ignition, via the car’s touchscreen menu. Because each vehicle varies, refer to your owner’s manual or consult your dealership for specific instructions.

Keep keys away from exterior doors and windows: Thieves can more easily capture your key fob’s signal when it’s near the perimeter of your home. If you typically store your key fob close to an exterior wall, door, or window, consider relocating it farther inside.

Reprogram key fobs when buying used: If you purchase a pre-owned vehicle with keyless ignition, have the key fobs reprogrammed. This ensures that any old fobs retained by previous owners will no longer work. Dealerships typically provide this service at a reasonable cost, giving you added peace of mind.

Use a steering wheel lock: For extra security, consider using a physical steering wheel lock. Seeing this visible deterrent may prompt thieves to seek an easier target.