To protect your car from being unlocked or stolen by thieves using devices that exploit your key fob's signal (also known as relay attacks or signal jamming), here are several measures you can take:
1. Store the Key in a Faraday Bag/Signal-Blocking Pouch
- A Faraday bag or signal-blocking pouch is a special case lined with materials that block radio frequencies (RF). When your key is inside, its signal can’t be relayed or detected.
- These are inexpensive and widely available online or at car accessory shops.
2. Keep Your Keys Away from the Front Door or Windows
- Thieves often use devices that can pick up your key’s signal from outside your home, so:
- Store your key far from entry points like windows or doors.
- The farther away your keys are from the perimeter of your home, the harder it will be for criminals to pick up and relay the signal.
3. Use a Metal Box or Tin Can
- A simple DIY method: place your car keys inside a metal box or tin can (like an old cookie tin or small metal container). The metal will block or at least reduce the strength of the key fob's signal, making it harder to relay.
- Ensure that the box is fully closed to prevent any leakage of the signal.
4. Turn Off the Key Fob’s Wireless Signal (If Possible)
- Some key fobs allow you to turn off the wireless signal when it's not in use. This is often done via a button combination or switch.
- Check your car’s manual or contact the manufacturer to see if your key fob has this feature and how to activate it.
5. Invest in a Steering Wheel Lock or Other Physical Security
- Steering wheel locks act as a visual and physical deterrent. Even if a thief manages to unlock your car, it becomes more difficult to drive away with a steering lock in place.
- Additional security measures like wheel clamps, pedal locks, or gearshift locks can provide extra layers of protection.
6. Install a Car Alarm or Immobilizer
- Many modern cars come with alarms, but installing an additional high-quality aftermarket alarm system may provide enhanced protection.
- Immobilizers prevent the car from starting unless the correct key fob is detected, even if the door is unlocked.
7. Use a Tracking Device
- If the worst happens and the car is stolen, a GPS tracker can help you recover it. These can be hidden in the car and allow you (or the authorities) to track its location.
- Some trackers have real-time alerts that notify you if your car is moved without your knowledge.
8. Disable Keyless Entry Features
- Some vehicles allow you to disable keyless entry. This removes the convenience of unlocking your car by proximity but reduces the risk of relay attacks.
- This option can typically be found in your car’s settings or by consulting the user manual.
9. Regularly Update Your Vehicle’s Software
- Some manufacturers release software updates that improve the security of their vehicles, including keyless entry systems. Make sure your car’s software is up to date.
- Check with your car dealer or manufacturer about any available updates.
10. Add a Home Security System
- Home surveillance cameras, motion detectors, or alarms near your driveway can discourage thieves from approaching your property.
- Many modern cameras come with mobile notifications and real-time video capabilities, so you’ll be alerted if anyone approaches your vehicle.
11. Use a Car Cover
- While this may seem like a simple tactic, a car cover can deter thieves since it adds a layer of inconvenience. They would need to remove the cover, potentially drawing attention to themselves.
- This also hides the make and model of your vehicle, which may deter criminals who target specific cars.
12. Park in a Garage or Well-Lit Area
- Park inside a garage if possible, as it provides a physical barrier.
- If you don’t have access to a garage, park in a well-lit, visible area to discourage thieves who prefer working in the shadows.
By combining multiple methods (like using a Faraday bag for the key and installing a steering wheel lock), you can greatly reduce the chances of your car being unlocked or stolen while you sleep