The Locksmith Journal 121 June 2026 | Page 55

VEHICLE SECURITY

Relay Theft:

How Criminals Steal Cars Without the Keys

» VEHICLE THEFT HAS evolved significantly in recent years, with criminals increasingly turning to high-tech methods to steal cars quickly and quietly. One of the most common techniques used against modern vehicles is relay theft, also known as a relay attack. This type of crime often takes place in under a minute and can happen without forced entry, broken glass or any visible signs of damage.
Understanding how relay theft works and how to protect yourself can help reduce the risk of becoming a victim.
What Is Relay Theft?
Relay theft is a method used to steal vehicles fitted with keyless entry and start systems.
These systems are designed to unlock the vehicle automatically when the key fob is nearby. The car constantly searches for the signal from the key and, when it detects it, allows access and ignition.
Criminals exploit this by using electronic devices that capture and extend the signal from the key fob inside your home to the vehicle parked outside. The car is effectively tricked into believing the key is present.
How Do Thieves Do It? Relay theft is usually carried out by two people working together. One thief stands close to the house, often near the front door, window or hallway wall, using a device that scans for the key signal. The second thief stands next to the vehicle with another device that receives and relays the signal.
Once the car believes the key is nearby, it unlocks and can often be started immediately.
In many cases, the whole process takes as little as 60 seconds.
This is why vehicles parked on driveways or directly outside homes are particularly vulnerable.
How Common Is It?
Relay theft continues to be a major contributor to vehicle crime in the UK.
Recent data suggests that signal manipulation and relay attacks account for around 58 % of vehicle thefts involving keyless cars.
Additional UK vehicle crime figures show:
• Approximately 60,900 cars stolen in the UK in 2025
• One vehicle stolen every 10 minutes
• Keyless cars are twice as likely to be stolen
• 44 % of vehicle thefts occur from driveways, garages or semi-private home parking areas
These figures highlight why vehicle security should begin at home.
How to Protect Yourself from Relay Theft
The good news is there are several simple and effective steps you can take.
1. Store Keys Away from Doors and Windows
Avoid leaving keys near the front door, hallway table or window ledges.
Keeping them deeper inside the property makes it harder for criminals to capture the signal.
2. Use a Signal- Blocking Pouch or Box
A Faraday pouch or signalblocking box prevents the key’ s radio signal from being transmitted outside the container.
This is one of the most effective ways to reduce the risk of relay theft.
3. Use a Steering Wheel Lock
Visible physical security still acts as a strong deterrent.
Even if criminals gain access electronically, a steering wheel lock adds time, noise and difficulty, making the vehicle less attractive.
4. Enable Additional Security Features
Some manufacturers offer:
• key sleep mode
• motion-sensing key fobs
• PIN-to-drive features
• app-based immobilisers
Check your vehicle handbook or speak to your dealer about built-in anti-theft settings.
5. Secure Your Driveway
CCTV, motion lighting and secure gates can help deter criminals and provide evidence if an attempt is made.
As many thefts occur overnight, good external lighting is especially important.
Search Vehicle Security on the Secured by Design website
What to Do If You Suspect an Attempt
If you notice signs of tampering, unexplained unlocking or suspicious people near your property:
• Report it to the police
• Contact your vehicle manufacturer or dealer
• Consider reprogramming your keys
• Increase physical security immediately
Criminals may return to the same location if they believe the vehicle remains vulnerable.
Staying One Step Ahead
Relay theft is a modern crime that exploits convenience technology, but simple preventative steps can make a significant difference.
Keeping keys secure, using signal-blocking protection and adding visible physical security can all help reduce risk.
For more crime prevention advice and vehicle security guidance, visit www. securedbydesign. com
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JUNE 2026
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