Car Immobilisers

Vehicle theft in the UK has continued to rise year on year, driven largely by keyless relay attacks and CAN bus hacking that bypass a car’s standard security.

A car immobiliser is one of the most effective ways to stop this: it’s an electronic device that prevents your engine from starting unless it recognises an authorised PIN, key fob, or smartphone signal, making your car undriveable to anyone who doesn’t have it.

Ghost Installations fits Thatcham-approved car immobilisers at your home or workplace, anywhere in the UK, with 0% finance available and free installation included in the price.

What Is a Car Immobiliser and How Does It Work?

A car immobiliser works by disrupting the connection between your car’s ignition and its engine control unit (ECU), so the engine simply won’t start unless the system recognises the correct authorisation. Older factory-fitted immobilisers rely on a chip in the key, which is exactly what keyless relay attacks and key cloning are designed to defeat. Modern aftermarket immobilisers, like the Ghost, work differently: they connect directly to your vehicle’s CAN bus network and require you to enter a unique PIN code using the car’s existing buttons (steering wheel, door panels, etc.) before the engine will start. There’s no extra fob to carry, nothing for a thief to scan, clone, or jam, and no visible box or light to show a system is even fitted.

Do I Need a Car Immobiliser? (Thatcham Category & Insurance)

If your car has keyless entry, is on a manufacturer’s high-theft list, or your insurer has asked for Thatcham-approved security as a condition of cover, a factory immobiliser alone usually isn’t enough. Thatcham categorises aftermarket security by what it protects against: Category 1 and 2 systems cover alarms and immobilisers, while Category S5 and S7 cover systems with an insurance-recognised monitoring or tracking element. Many UK insurers now require Thatcham Category S5 or S7 approved security on higher-risk models before they’ll offer cover, or in exchange for a lower premium. Every immobiliser Ghost Installations fits is Thatcham-approved, so it satisfies these insurer requirements as well as protecting the car itself.

How Much Does a Car Immobiliser Cost to Install?

Fully fitted car immobilisers from Ghost Installations start at £449 and range up to £1,198, depending on the system and vehicle. That price includes installation at a location of your choice, nationwide, with no extra call-out charge. 0% interest finance is available, spreading the cost over 4 simple payments, so there’s no need to pay the full amount upfront.

Ghost Immobiliser vs a Standard Immobiliser

Most immobilisers you’ll find are a black box wired in behind the dashboard; a thief who knows what to look for can sometimes locate and bypass them. The Ghost immobiliser is different: it has no fob, no keypad, and no LED, so there’s nothing to see or find. You start the car by entering your PIN using the buttons already built into your vehicle, and you can also arm, disarm, and manage the system from your smartphone. Because it’s built into the CAN bus network rather than sitting inline with the wiring, it’s significantly harder to identify and defeat than a conventional immobiliser.

Car Immobilisers for Keyless Cars (Relay Attack Protection)

Keyless entry is now one of the most exploited weaknesses in modern car security. Relay attack devices let thieves capture and amplify your key fob’s signal from inside your home, tricking the car into thinking the key is present. A car immobiliser closes this gap completely: even if a thief relays your key signal and unlocks the car, they still can’t start the engine without your PIN. It’s the single most effective upgrade for any keyless car, and it’s why insurers increasingly ask for it by name.

Nationwide Mobile Installation

Ghost Installations fits car immobilisers at your home, workplace, or another location of your choice, anywhere in the UK. Our engineers are open Monday to Friday 8am–8pm, Saturday 10am–2pm, and Sunday 10am–4pm, so booking around your schedule is straightforward. Call 0800 246 1482 or book online to arrange a fitting.

Common Car Immobiliser Questions Answered

1. What is a car immobiliser? A car immobiliser is an electronic security device that prevents your engine from starting unless it recognises an authorised PIN, key, or smartphone signal, stopping the car being driven away even if it’s broken into.
2. How does a car immobiliser work? It connects to your vehicle’s engine control unit (ECU) or CAN bus network and blocks the ignition sequence until it receives the correct authorisation, such as a PIN code entered on the car’s own buttons.
3. Will an immobiliser affect my car’s performance? No. Car immobiliser systems integrate seamlessly with your vehicle’s ECU and have zero impact on how the car drives or performs.
4. What happens if I forget my PIN code? Every Ghost Installations immobiliser includes a straightforward backup procedure, so you’re never permanently locked out of your own car.
5. Do immobilisers work with modern keyless cars? Yes. Immobilisers are especially effective on keyless cars, as they stop relay attacks and key cloning by requiring a PIN the thief doesn’t have, even if they’ve captured your key’s signal.
6. How much does a car immobiliser cost to install? Fully fitted immobilisers start at £449, with 0% interest finance available over 4 payments. Installation is included in the price, anywhere in the UK.
7. Is a car immobiliser Thatcham approved? Yes, every immobiliser fitted by Ghost Installations is Thatcham approved, meeting the security standards many UK insurers require for cover or a reduced premium.
8. Do I need a subscription for a car immobiliser? No. Unlike a tracker, a car immobiliser is a one-off fitted cost with no ongoing subscription or monitoring fee.