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  • Max Kelly

Do You Need a Faraday Bag for Your Car Keys?

In an era where technology is advancing at a rapid pace, so are the methods used by car thieves to exploit vulnerabilities in our electronic devices. One such threat is relay theft, a technique used to steal modern vehicles equipped with keyless entry systems. To combat this growing concern, many individuals have turned to Faraday bags or pouches as a potential solution. In this blog post, we will explore whether you truly need a Faraday bag for your car keys.

car keys on top of faraday bag

The Basics of Faraday Pouches

Faraday pouches, also known as Faraday bags or signal blockers, are designed to shield electronic devices from transmitting or receiving signals. These bags are made of a material that can block electromagnetic fields, effectively isolating devices from the outside world.

The Threat of Relay Theft

Relay theft has become a significant concern for car owners, especially those with keyless entry systems. This method involves intercepting and amplifying the signal between a car key fob and a vehicle, allowing thieves to gain unauthorized access to the car.

With the use of simple electronic devices, criminals can extend the range of the car key fob's signal, even from inside your home, ultimately bypassing any security measures in place.

Mobile Phones as Potential Vulnerabilities

It's important to note that relay theft isn't limited to car keys alone. Mobile phones, with their increasing connectivity and ability to interact with vehicles remotely, can also be targeted by criminals.

By using a hacked or cloned mobile phone to mimic the car key fob's signal, thieves can gain access to the vehicle and potentially drive away undetected. This further highlights the need for protective measures against relay theft.

The Effectiveness of Faraday Bags

Faraday bags offer a simple and effective solution to protect your electronic devices, including car keys and mobile phones, from being targeted by relay theft. By placing these devices inside a Faraday bag, the electromagnetic signals they emit are blocked, rendering them invisible to potential thieves.

This physical barrier prevents any unauthorized access attempts, safeguarding your vehicle and personal belongings.

Weighing up the Benefits

While the use of Faraday bags may seem like an unnecessary precaution to some, the risks posed by relay theft and the increasing sophistication of car thieves cannot be ignored.

Investing in a Faraday bag can provide peace of mind, knowing that your car keys and other electronic devices are protected from potential exploitation. Additionally, these bags are relatively inexpensive and come in various sizes, making them convenient for daily use.


By investing in a Faraday bag, you can significantly reduce the risk of becoming a victim of relay theft and ensure the security of your vehicle. In an increasingly connected world, taking proactive steps to safeguard our possessions is a wise.


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