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A Ghost immobiliser is a hidden aftermarket security device that stops your car starting until you enter a personal PIN sequence on buttons already in the vehicle. It connects to the car’s CAN bus, arms automatically when you switch off, and blocks key cloning or relay-attack theft even if a thief has your genuine key.
Car thieves are getting more sophisticated, using electronic tools to defeat the immobilisers and alarms that come as standard. A Ghost immobiliser is the answer to that: a covert device that prevents your car from starting until you enter a unique PIN sequence, using the buttons already on your steering wheel, dashboard or centre console. Even a thief holding your genuine key cannot drive away without the code. Below, the security team at Ghost Installations explains exactly what it is, how it works and why it is one of the most effective ways to protect a modern vehicle.
The Ghost, made by Autowatch, is the first aftermarket immobiliser to work through your car’s Controller Area Network (CAN) bus, the internal network its electronics use to talk to each other. It is a small, hidden module with no keypad, no fob and no visible wiring, which is what makes it so hard for thieves to find or defeat.
Instead of a key signal, it uses a code you choose yourself: a sequence of up to around 20 button presses, entered on controls the car already has. Because you set the sequence, only you (and anyone you share it with) can start the vehicle.
The Ghost arms itself automatically once you switch the car off, with nothing to press or remember. When someone next tries to start the car, the Ghost withholds the authorisation message the engine control unit (ECU) needs, so the engine stays disabled. Only when the correct button sequence is entered does it release that message and allow the car to start.
Because it works through the CAN bus rather than radio, there is no signal for a relay device to capture or replay, which is what makes it so effective against keyless theft. The installation does not cut into your original wiring, and the system can be configured either to block starting entirely or to let the engine turn over and then immobilise, to confuse and delay a thief. Enter the wrong sequence too many times and it locks out further attempts for a period.
| Theft method | Does the Ghost stop it? | Why |
|---|---|---|
| Relay attack | Yes | There is no radio signal to capture; the engine needs your PIN sequence. |
| Key cloning | Yes | A cloned key still cannot start the car without the sequence. |
| Key theft | Yes | Holding the physical key alone will not start the engine. |
| OBD / diagnostic hacking | Yes | There is no wireless signature for diagnostic tools to detect or exploit. |
| Signal jamming | Yes | The Ghost emits no signal, so there is nothing to jam. |
A Ghost gives real peace of mind by making your car a hard, unpredictable target. Once memorised, entering the PIN becomes second nature, much like unlocking a phone. There are no extra fobs to carry, and it does not affect your car’s warranty, wiring or interior. It is TASSA-accredited, and some insurers may offer a benefit for a professionally fitted immobiliser, though this varies, so it is worth checking with yours.
A Ghost must be fitted by trained technicians, which is where Ghost Installations excels. The job usually takes a few hours depending on the vehicle, and we come to you, at home or work. The technician programs your chosen sequence, hides the unit, tests it thoroughly and walks you through using your PIN and service mode. Explore our Ghost immobiliser installation service to book.
The Ghost suits owners of luxury and performance cars, family cars and work vans alike, especially with keyless theft rising in urban areas. Businesses can fit it across a fleet, and owners of classic cars, which often lack modern security, gain a discreet layer of protection that does not alter the vehicle.
By requiring a unique PIN sequence to start, the Ghost defeats even determined, tech-savvy thieves while staying invisible and easy to live with. Its wide vehicle compatibility, clean integration and possible insurance benefits make it a compelling choice. To protect your car with a professionally installed Ghost, contact Ghost Installations or call 0800 246 1482.
What is a Ghost immobiliser? A Ghost immobiliser is a hidden aftermarket security device that stops your car starting until you enter a personalised PIN sequence using buttons already in the vehicle. It emits no signal and has no keypad or fob.
How does a Ghost immobiliser work? It connects to the car’s CAN bus and arms automatically when you switch off. At the next start attempt it withholds the authorisation the engine needs until your correct button sequence is entered, then allows the car to start.
Can a Ghost immobiliser be bypassed or hacked? It is extremely difficult. There is no radio signal to intercept and no wireless signature for diagnostic tools, and even if the hidden unit were found and disconnected, the car would not start.
Does a Ghost immobiliser stop keyless (relay) theft? Yes. Because starting the car needs your PIN sequence rather than a key signal, a relay attack or a cloned key cannot drive the vehicle away.
Can you still start the car normally with your key? You use your key as usual, but you also enter your PIN sequence on the existing buttons before the engine will start. A service mode lets you allow access temporarily without sharing the code.
Is the Ghost immobiliser TASSA approved, and will it lower my insurance? The Ghost is TASSA-accredited. Some insurers may offer a benefit for a professionally fitted immobiliser, but this varies, so check with your insurer.
