Drivers Urged to Wrap Their Keys in Tinfoil as Car Theft Tactics Evolve

Modern vehicles are packed with advanced technology—from digital dashboards to smart safety features and, increasingly, keyless entry systems. Being able to unlock and start your car with the push of a button, without inserting a physical key, is undeniably convenient. However, as vehicle technology becomes more sophisticated, criminals are also finding new ways to exploit it. One increasingly common method is known as relay theft, and experts are urging drivers to take simple precautions to protect themselves.

What Is Relay Theft?

Relay theft is a high-tech car theft technique that allows criminals to steal vehicles without breaking in or triggering alarms. Thieves use specialized electronic devices, often called relay boxes, to intercept and amplify the radio signal emitted by a keyless fob. These devices can pick up the signal even when the key fob is inside a house, apartment, or workplace.

Once the signal is captured, it is relayed to another device near the car, tricking the vehicle into believing the key fob is present. This allows thieves to unlock the doors and start the engine in seconds—often without leaving any visible signs of forced entry.

How to Protect Your Vehicle

Although relay theft sounds alarming, experts say there are simple and affordable ways to significantly reduce your risk.

1. Tinfoil: A Surprisingly Effective Signal Blocker

One of the most unexpected yet effective solutions is wrapping your key fob in tinfoil. According to security specialists, including former FBI agent Holly Hubert, aluminum foil blocks electromagnetic signals. When the signal from your key fob is blocked, thieves cannot intercept or relay it to your car.

This method works because the foil creates a basic Faraday cage, preventing radio waves from passing through. It’s cheap, easy to use, and can be done at home in seconds.

2. Faraday Bags and Signal-Blocking Cases

For those who prefer a more durable option, Faraday bags or signal-blocking pouches are widely available. These products serve the same purpose as tinfoil but are designed specifically for key fobs and wallets. While they are more convenient and long-lasting, they are also more expensive—making tinfoil a practical alternative for many drivers.

Why This Matters More Than Ever

Car theft is not only emotionally distressing but can also be financially devastating. Insurance claims, repairs, and replacement costs can quickly add up. As keyless entry systems become standard in newer vehicles, relay theft is becoming more common worldwide.

Taking small preventative steps—especially ones that cost little or nothing—can make a significant difference. Storing your keys in a signal-blocking pouch, wrapping them in foil overnight, or keeping them away from doors and windows can all help reduce vulnerability.

Sharing this information with friends and family may help them avoid becoming victims as well. In a world of advanced automotive technology, sometimes the simplest solutions are the most effective.Protecting your vehicle doesn’t have to be complicated or expensive—sometimes, all it takes is a small piece of tinfoil.