Last Updated on February 11, 2025 by Alan Weir
Securing Your Car Against Key Signal Jamming: Expert Insights from a Car Locksmith
Ah, the joys of modern vehicle technology! Keyless entry systems have undeniably added a layer of convenience to our lives. You simply approach your car, and it unlocks itself. But, alas, with convenience comes risk. One vulnerability that has come to light in recent years is signal jamming. It’s a sneaky, low-tech method criminals use to thwart your key fob, leaving your prized possession vulnerable. So, let’s dive into the world of key signal jamming, why it’s a problem, and how you can secure your car like a pro.
Understanding Key Signal Jamming
Before we get into the nitty-gritty of securing your vehicle, it’s essential to understand what signal jamming is. Key signal jamming is a tactic where potential thieves use devices that can block or interfere with the radio signals sent between your key fob and your car. This means that when you’re trying to lock or unlock your car, your command may not be received. It’s a bit like trying to call someone on a phone with a very poor signal—you’re shouting, but no one’s picking up.
Imagine you’ve parked your car at a supermarket. You hit the lock button on your fob, but the signal gets jammed, and your car remains wide open for anyone to just hop in and drive away. Scary thought, isn’t it?
Signs of Signal Jamming
So how do you know if someone is jamming your signal? Sometimes it’s tricky to spot. A common sign is the non-responsive behaviour of your key fob. If you repeatedly press the button, and nothing happens, it could simply be a dead battery. But if your key fob works fine some days while on others it doesn’t, you might just be a victim of signal jamming.
You might also notice that your car sometimes doesn’t automatically lock when you walk away—it simply doesn’t register that you’ve moved too far from it. If this becomes a regular occurrence, it’s time to ramp up your car’s security.
Practical Tips to Secure Your Vehicle
Now that we’ve laid the groundwork for understanding the problem, let’s look at practical steps you can take to mitigate the risks of key signal jamming.
1. Invest in a Signal-Blocking Container
One of the simplest yet most effective ways to protect your key fob is to invest in a signal-blocking pouch, also known as a Faraday bag. These specially designed bags shield your key fob from electromagnetic signals. When you place your key fob inside, it will be virtually invisible to any signal jamming devices.
When you’re at your home or anywhere you feel safe, keep your key fob in the Faraday bag when you’re not using it. It’s an extra layer of defence that could save you from untold hassle.
2. Use a Traditional Key for Additional Security
You might be one of the many who solely rely on key fobs for access to their vehicles. However, combining modern technology with a good old-fashioned key can offer an added layer of security. Many keyless entry cars also come with a physical key hidden somewhere within the fob. Make sure that you know how to access and use this key.
Additionally, having a traditional key is beneficial if your battery ever dies, or if the fob stops working for any reason. Plus, if you suspect signal jamming, simply use the physical key instead. It’s a reliable old school tactic that can bypass the entire issue.
3. Lock Your Car Manually
While it may feel more convenient to automatically lock your car with a button, consider locking your car manually sometimes. By pressing the lock button while watching the door locks, you can ensure that the signal has been received. Another habit to foster is to listen for the audible confirmation sound that indicates your car has locked—this can give you greater peace of mind.
4. Upgrade Your Lock System
If your car is starting to show its age, consider upgrading to a more secure locking system. An advanced deadlock or a more sophisticated alarm system can thwart potential thieves even if they manage to bypass the key fob system. While it might take a bit of an investment upfront, you’ll feel far more secure every time you park your vehicle.
5. Be Aware of Your Surroundings
Thieves often operate in patterns. Being vigilant and aware of your surroundings can prove beneficial. If you notice a suspicious individual loitering around your car, it’s worth taking a moment to reposition yourself or alert security if you’re in a public space.
Make it a habit to glance around when you park or leave your vehicle. If you sense something is amiss, trust your gut—stay vigilant and take the necessary precautions.
6. Consider Smart Technology for Alerts
While you can’t completely eliminate risk, technology can certainly help. Some modern vehicles offer smart technology that sends alerts to your smartphone if there’s any interference or attempted access to your car. Installing additional security cameras or motion sensors in your driveway can also help monitor any suspicious activity.
You’re already investing in a decent vehicle; why not take the next step to ensure it remains protected?
7. Regular Maintenance and Updates
Just like you service your vehicle for better performance, ensure that your car’s software is up to date. Manufacturers regularly release updates that can counter vulnerabilities, including those related to keyless entry systems. Make it a point to stay informed about any recalls or software improvements that can bolster your vehicle’s security features.
8. Know Your Insurance Policy
While not a direct defence against signal jamming, having comprehensive insurance can provide you with peace of mind. Familiarise yourself with what your policy covers in the case of theft or damage. Some packages might even offer additional security measures or tips. Engaging your insurance provider for car security advice can be invaluable.
In this ever-evolving world of automotive technology, staying informed and proactive is your best weapon against potential threats. Equip yourself with knowledge and practical steps to protect your vehicle. After all, your car isn’t just a means of transport—it’s an investment, a part of your everyday life, and often, a reflection of who you are. So, treat it with the respect it deserves and secure it wisely.
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.
