
Yes, keyless cars can be stolen without the physical key fob, often in under 60 seconds using relay attacks or similar electronic methods. Industry data from organizations like the National Crime Bureau indicates that keyless entry systems are a growing target, with relay attacks accounting for a significant portion of thefts in regions like Europe and North America. Thieves exploit vulnerabilities in wireless signals to unlock and start vehicles rapidly, but owners can mitigate risks through practical security measures.
Relay attacks are the most prevalent technique, involving two devices that amplify the key fob signal from inside a home to the car. One thief uses a transmitter near the house to capture the signal, while another by the car employs a receiver to mimic the key fob, enabling access and ignition within 30 seconds in some cases. Signal jamming is another common method, where thieves block the locking signal when you press the key fob, leaving the car unlocked without your knowledge. This often occurs in public parking areas, with jammers being small and easily concealed. Reprogramming hacking involves accessing the car's OBD port, typically after breaking a window, to reprogram the computer system with a new key using portable devices like tablets. This method is more invasive but can be prevented with physical locks on the OBD port.
To protect your car, store key fobs in a Faraday bag or metal tin, which blocks radio signals and prevents interception by thieves. Keep keys away from external walls, doors, and windows to minimize signal leakage, as even short distances can reduce vulnerability. Install a steering wheel lock or gearstick lock as a visible deterrent, adding a layer of physical security that can slow down theft attempts. Industry reports suggest that such visible measures reduce theft likelihood by acting as a psychological barrier.
Regularly update your car's software through manufacturer portals or dealers, as patches often address security flaws in keyless systems. For example, some automakers release updates that enhance encryption or require additional authentication. Aftermarket security systems like GPS trackers or alarms can provide alerts for suspicious activity, offering real-time monitoring.
Data from the Insurance Institute for Highway Safety shows that vehicles with keyless entry face higher theft rates, emphasizing the need for proactive steps. By combining signal-blocking storage, physical locks, and software updates, owners can significantly lower risks and align with global security standards. Always verify doors are locked manually and consider consulting security experts for tailored advice, as technology evolves rapidly in this field.

As a car owner in London, I learned the hard way that keyless cars are easy targets. Last year, my SUV was nearly stolen via a relay attack—thieves amplified the key signal from my hallway in under a minute. Now, I keep my fobs in a Faraday pouch I bought online, and I never leave them near the front door. Adding a steering lock gave me peace of mind; it’s a cheap visual deterrent that makes thieves think twice. I also check for software updates from my dealer every few months. These simple habits have made my car feel much safer, and I’d urge others to do the same.

I’m an automotive researcher, and I can confirm that keyless systems have flaws. The technology relies on radio frequency signals between the key fob and car, which thieves intercept using relay devices. These devices cost as little as $100 online and can extend the signal range up to 100 meters. Signal jamming works by emitting noise on the same frequency as the locking signal, disrupting communication. Reprogramming via the OBD port is possible because some manufacturers use weak encryption. To counter this, use Faraday bags that block all RF signals, and consider installing an OBD port lock. Manufacturers are slowly improving security, but until then, user vigilance is key.

Working as an agent, I see claims for keyless car thefts rise each year. Policies often cover these losses, but premiums can increase after an incident. To lower your risk and potentially reduce costs, I recommend using signal-blocking pouches—they’re inexpensive and effective. Also, install a steering wheel lock; many insurers offer discounts for approved anti-theft devices. Keep keys away from entry points, and always double-check that your car is locked. If your model has known vulnerabilities, ask your dealer about software patches. Documenting these steps can help during claims and shows you’re proactive about security.

From my experience as a consultant, protecting a keyless car requires a layered approach. Start with basics: store key fobs in a Faraday bag or a metal box at night, and place them far from exterior walls. Use a steering lock every time you park—it adds physical effort for thieves. For tech solutions, update your car’s software regularly; manufacturers like BMW and Mercedes release security updates periodically. Consider adding a GPS tracker for recovery if theft occurs. Avoid leaving valuables in sight, and park in well-lit areas or garages. These practices, based on real-world cases, can deter most theft attempts and keep your vehicle secure.


