Last Updated on February 11, 2025 by Alan Weir
How to Prevent Relay Car Theft with Keyless Entry Systems
As an expert car locksmith, I’ve seen a dramatic rise in the sophistication of car theft methods over the years. One of the most alarming trends is the rise of relay car theft, particularly targeting vehicles with keyless entry systems. These systems, which come as standard in many modern vehicles, offer unparalleled convenience, allowing us to unlock and start our cars without digging around for keys. However, they also come with vulnerabilities that savvy thieves are all too eager to exploit.
Before we dive deep into prevention methods, let’s get a grasp on what relay car theft actually is. In a nutshell, it involves two thieves working in tandem. One thief stands near your home, using a special device to capture the signal emitted by your car’s key fob, which is typically within a few metres of the vehicle. Meanwhile, the accomplice stands near your car, using a second device to amplify that signal and unlock the car. It’s alarming how quickly this can happen—often in under a minute. Now, let’s look at some effective measures you can take to thwart these nefarious plans.
1. Invest in a Signal Blocker
One of the most straightforward solutions is to use a signal-blocking pouch or Faraday bag. These nifty little accessories are lined with a special fabric that blocks radio signals, effectively ‘turning off’ your key fob when it’s inside. Simply stow your key fob in the pouch when it’s not in use, and you’ll make it much harder for potential thieves to pick up its signal.
You can find these pouches in various styles and designs, so there’s no need to compromise on aesthetics if you’re worried about appearance. It’s a small investment with a potentially huge payoff in terms of vehicle security.
2. Key Fob Programming Adjustment
While you may not have control over a manufacturer’s decisions, many car models now offer an option to adjust the key fob’s settings. Some cars can be reprogrammed to reduce the frequency at which they emit a signal. If your vehicle allows this, it’s worth contacting your dealer or an auto locksmith to see if it’s an option. Less frequent signaling means less opportunity for thieves to capture your key’s signal.
3. Use a Steering Wheel Lock
While steering wheel locks may seem a bit old school, they can still be effective at deterring thieves. A bright, visible lock can be seen as a hurdle by criminals who are looking for quick and easy targets. While it may not directly stop relay theft (since the steering wheel can still be turned once inside), it can certainly help to put off opportunistic thieves who might think twice about breaking into a vehicle that looks extra secure.
4. Install a Secondary Immobiliser
Adding an extra layer of security can work wonders. A secondary immobiliser system can make your vehicle less appealing to potential thieves. These devices can be hidden away and require a specific action to start the car, be it entering a code or using a hidden switch. This added complexity can deter even the most determined of criminals and provide you with some peace of mind.
5. Always Park Smartly
This might seem obvious, but always be mindful of where you park your car. Opt for well-lit, busy areas whenever possible. If your driveway is an option, that can be ideal, as it adds another layer of difficulty for thieves. Positioning your car close to your home also helps lessen the range thieves need to capture your key fob’s signal.
6. Keep Your Key Fob Safe
It’s essential to treat your key fob just like you would your home keys or credit cards. Keep it in a secure place and avoid leaving it in easily accessible spots like side tables or kitchen counters where a thief could potentially grab it through a window or a door.
You might consider moving your key fob to a glass container; this could disrupt the signal and make it difficult for thieves to capture the signal. Some people even go as far as storing their key fob in a metal container—a bit unconventional, but it might just do the trick.
7. Consider a GPS Tracker
While this doesn’t prevent relay theft per se, it certainly gives you an advantage if the worst were to happen. GPS trackers are small devices that can be hidden away in your vehicle and enable you to track its location in real time. If someone does manage to take your car, having a GPS tracker means you can alert the police with an exact location, thus increasing the chances of recovering your vehicle swiftly.
Many modern trackers come with additional features like geofencing, which sends alerts if your vehicle leaves a specified area. It’s like having a little guardian for your car.
8. Always Monitor Your Surroundings
Cultivating a habit of being aware of your environment can serve as a crucial deterrent. If you notice suspicious behaviour, it’s always better to err on the side of caution. Whether it’s someone lingering too long around your vehicle or behaving oddly near parked cars, trust your gut and report anything concerning to the authorities.
9. Regular Vehicle Security Checks
Make vehicle security a routine part of your car maintenance. Take time to inspect your locks, alarm systems, and any additional security equipment you have on board. This isn’t just useful but necessary to ensure everything’s functioning correctly. Over time, you might notice slight tweaks or upgrades that can improve your security.
Calling in professionals for a regular assessment can also provide an expert’s eye to identify any potential weaknesses in your vehicle’s security setup. You wouldn’t skip regular health check-ups; why do the same for your vehicle?
10. Stay Informed
Knowledge is power, and staying informed about the latest trends in vehicle theft and security can help you take better action. Knowledge about new gadgets and devices that thieves are using could inspire you to keep your security tighter than ever. Following trusted sources within the automotive community, subscribing to security blogs, or participating in local community watch forums can help you stay one step ahead of potential criminals.
We’ve skipped over the notion of paranoia here because we’re talking about protecting your investment and maintaining peace of mind. Run an audit of your vehicle’s security every so often, especially when new systems and threats come to light.
In the end, having a keyless entry system doesn’t mean you have to compromise on security. With a bit of awareness and a dash of proactive measures, you can significantly reduce your risk of falling victim to relay car theft. After all, your vehicle is not just a mode of transport; it’s an investment, a lifeline, and something you rely on daily. By taking action on these points, you can enjoy the convenience of keyless entry without the looming fear of theft—now that’s something worth driving about!
Alan Weir – Master Locksmith with 30+ Years of Experience
Alan Weir is the founder of Weir Locksmiths and a Master Locksmith with over three decades of experience. Renowned for his expertise in home and automotive security, Alan has built a reputation for providing reliable and innovative locksmith solutions across the UK.
A certified member of the Master Locksmiths Association (MLA), Alan specialises in residential, commercial and automotive locksmith services including car key replacement, transponder programming, and advanced security systems. His dedication to the field has earned him thousands of satisfied customers and glowing reviews on platforms like Checkatrade.
Now contributing to RevLock, Alan shares his expert knowledge to all of RevLocks visitors.
