Relay Attack Protection UK 2026 — How to Stop Keyless Car Theft

Relay attacks are the most common method used to steal keyless cars in the UK. In under 30 seconds, thieves can capture your key fob signal through your front door and drive away in your car. Here's how it works and — more importantly — how to stop it.

What Is a Relay Attack?

A relay attack uses two devices. One thief stands near your house with a relay amplifier that captures the signal from your key fob — even through walls, doors, and windows. The second thief stands by your car with a relay transmitter that broadcasts the captured signal. Your car thinks the key is right next to it and unlocks and starts normally.

The entire process takes less than 30 seconds. There's no broken window, no alarm, no noise. Your car simply drives away.

Which Cars Are Vulnerable?

Any car with keyless entry and keyless start is potentially vulnerable. The most targeted vehicles include:

• Range Rover and Range Rover Sport
• BMW M3, M4, M5, X5, X7
• Mercedes-Benz C-Class, E-Class, GLE, G-Wagon, AMG models
• Audi RS3, RS6, Q7, Q8
• Land Rover Defender
• VW Golf R, Tiguan
• Ford Focus, Fiesta, Puma
• Kia and Hyundai models with keyless entry

Do Faraday Pouches Work?

Faraday pouches (signal-blocking key cases) can block the relay signal when used correctly. However, they have significant weaknesses:

• You have to remember to use them every single time
• Cheap pouches often leak signal
• If you leave the pouch open or the key outside it even once, you're unprotected
• They don't protect against key cloning or OBD port attacks

A Faraday pouch is better than nothing, but it's a £10 plaster on a £50,000+ problem.

The Best Protection: Ghost Immobiliser

A Ghost immobiliser defeats relay attacks completely. Even if a thief captures your key signal and unlocks the car, the engine will not start without your personal PIN sequence. The PIN is entered through your car's existing buttons — no extra fob, no extra device, nothing a thief can find or steal.

The Ghost is also immune to:

• Key cloning
• Code grabbing
• OBD port reprogramming
• Diagnostic scanning

Ghost + Tracker = Maximum Protection

For the most complete defence, pair a Ghost immobiliser with a Thatcham S5 tracker or MetaTrak S5 Deadlock. The Ghost prevents the car being started. The tracker finds it if it's ever physically moved. The Deadlock can remotely stop the engine.

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Get Protected

Ghost immobilisers are available from £449.99 including professional installation at our East London or Luton workshop. Same-week fitting available.

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German Auto Mods — Relay attack protection in East London and Luton. Ghost immobiliser installation from £449.99. Professional fitting for BMW, Mercedes, Audi, Range Rover and more.