Luton · Keyless cars
FACTORY SYSTEM · DEFEATED
Relay theft uses two small boxes. One stands at your front door and picks up the signal your fob quietly gives off; the other stands by the car and repeats it. The car believes the key is in the driver's hand — and the factory immobiliser, seeing a valid key, does exactly what it was designed to do. It lets the car start.
Attack
Two-box relay
Factory system
Bypassed
Forced entry
None
Time
Under 60 seconds
How it actually works
A factory immobiliser stops a screwdriver in the ignition. It does not stop a perfectly valid key signal. Once the relay kit has copied the conversation between your fob and the car, the onboard system treats the thief as you. The doors unlock. The start button works. The alarm stays silent because, as far as the car is concerned, nothing is wrong.
That is why a second, hidden immobiliser is the thing that changes the outcome. It asks for something that is not on the key — a sequence on buttons the car already has — so a relayed fob still gets a car that cranks and never fires.
What actually stops it
Until your disarm sequence is entered, the engine will crank but never fire. A relayed key, a clone, or a blank written through the OBD port gets exactly nowhere — even after the factory system has already said yes.
Best sellerLead immobiliser
The name insurers know, and the one we fit most.
A disarm sequence on buttons the car already has. Until it is entered, a relayed key, a clone, or a blank written through the OBD port still gets nowhere.
Self-serviceAlso fitted
The same job. PIN and valet from your phone.
Same protection as the Ghost — with timed valet mode you can set before a garage visit, and a PIN you change from your own phone.
TASSA registered
Written price before work
Mobile, on your drive
No call-out fee
Questions
Yes — and it is the first thing a relay attack defeats. The factory system is designed to stop the car starting without its own key. A relay kit presents that key, so the onboard immobiliser sees a legitimate start and stands down. What it cannot do is ask for a second step that is not on the fob, which is the whole point of a Ghost or a Phantom.
Yes — Leagrave, Stopsley, Wigmore, Bury Park, Farley Hill and the Luton LU1–LU4 postcodes are all standard territory. We come to your driveway; there is no unit to drive to and no call-out charge.
Book in
Send your registration and we'll come back with which immobiliser suits the car, then a written price before any work starts.
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