Ghost Car Immobiliser — Is It Worth It?
You might have heard about the Ghost immobiliser from a mechanic, a forum, or a car-savvy friend. You might also be here because your car was nearly stolen — or was stolen — and you're looking for the strongest protection available. Here's exactly what a Ghost immobiliser is, what it does, what it costs, and whether it's right for your car.
What Is a Ghost Immobiliser?
A Ghost immobiliser — specifically the Ghost 2 (the current model) — is a small electronic device wired directly to the vehicle's CAN bus. It acts as a second layer of protection on top of the factory immobiliser — and critically, it is completely invisible.
Here's what makes it different from a conventional aftermarket immobiliser: it has no visible components. No flashing LED on the dashboard. No keypad stuck to the dash. No alarm fob cluttering your keyring. It emits no radio frequency signal, which means a thief's RF scanner — the tool used to detect aftermarket security — cannot find it.
To start the car, you enter a programmable PIN sequence using the buttons already in your vehicle — steering wheel controls, window switches, or dashboard buttons. If the right sequence isn't entered, the engine simply won't start. The ghost immobiliser blocks the fuel pump and starter circuit via the CAN bus, and no amount of key cloning, relay theft, or OBD hacking will override it.
Key Takeaways
- Installed on the CAN bus — no visible wires, LEDs, or keypads
- Uses existing car buttons for PIN entry — nothing extra on your keyring
- Zero radio frequency emissions — undetectable by thief scanning tools
- Thatcham Cat 2 approved, certified by Sold Secure
How the Ghost Immobiliser Actually Stops Theft
1. Relay Theft
Relay attacks clone the key signal to unlock and start the car. A Ghost prevents the engine from starting even if the key is cloned — the CAN bus blocks the fuel pump and starter until the correct PIN is entered.
2. OBD Port Hacking
Thieves plug a tool into the OBD port to programme a blank key and drive away. The Ghost blocks starter and fuel engagement via CAN — a new key won't help.
3. Key Theft
If your keys are stolen from your house, the thief has the key — but the Ghost blocks engine start. The car stays where you left it.
Who Should Get a Ghost Immobiliser?
A Ghost immobiliser isn't for everyone — it's a premium bit of kit for people who either own a high-theft-risk vehicle or have been targeted before. If one of these applies to you, it's worth a serious look:
Keyless entry vehicle owners
If your car has keyless entry and push-button start, relay theft is your number-one risk. A Ghost is the single most effective countermeasure — it blocks the start regardless of how many times the key is cloned.
High-theft-risk vehicle owners
Ford Fiesta ST, Range Rover Sport, BMW X5, Audi RS4, Golf R — these are the UK's most stolen cars, year on year. If you own one, the manufacturer's immobiliser is not enough. A Ghost adds the layer that stops professional thieves who specifically target your model.
People who have already had a car stolen
If you've been through the stress of waking up to an empty driveway, you know the peace of mind is worth the cost. A Ghost won't stop someone from breaking into your house to get the keys — but it will stop them from driving away even if they do.
Tradespeople with tool-filled vans
Ford Transit Customs, VW Transporters, and Mercedes Sprinters are increasingly targeted for the tools inside — and the van itself. A Ghost keeps the van where you parked it, protecting your livelihood.
Performance or modified car owners
Your car is worth more than its book value — to you and to a thief. The factory security was designed for a stock car, not a Stage 2 remap on coilovers.
Ghost 2 vs Ghost 2 Pro — What's the Difference?
The original — £449–£549 installed
- Button-press PIN entry via steering wheel/console
- No visible components or LED
- Zero RF emissions
- Programmable PIN (4-20 presses)
- Valet/service mode for garage visits
- Emergency PIN override via indicator stalk
Bluetooth version — £499–£599 installed
- Everything the Ghost 2 does, plus:
- Smartphone app — no PIN entry needed
- Auto-disarms when your phone is nearby (Bluetooth proximity)
- Re-arms when phone leaves range
- Allows multiple authorised phones (family members)
- Fallback PIN entry if phone battery dies
Both are officially TASSA-registered and Sold Secure Diamond certified. Prices vary by vehicle complexity.
The Downsides You Should Know
No piece of security equipment is perfect. Here's the honest version:
You have to enter a PIN every time you start the car
For the Ghost 2, it's a button sequence using whatever controls you've programmed — every single time. You get used to it (it becomes muscle memory), but it is an extra step. The Ghost 2 Pro solves this with Bluetooth but costs more.
If you forget your PIN, you're stuck
There is an emergency override code — but it's long and you'll need to call your installer to walk you through it. Keep your PIN written down somewhere secure (not in the car).
It won't stop relay theft of the unlock signal
A Ghost immobiliser prevents the engine from starting — it doesn't block the key's unlock signal. A thief can still unlock your car via relay attack, but they can't drive it away. For full protection, pair a Ghost with a faraday pouch for your keys.
It costs £449-£599
This is not a cheap car alarm. It's a professional-grade security device that requires a specialist to install. There are cheaper immobilisers — but none that offer the same level of invisibility and CAN-bus-level protection.
Ghost Immobiliser FAQs
Does a ghost immobiliser affect my car key replacement?+
Will a ghost immobiliser drain my battery?+
Can I transfer a Ghost immobiliser to a new car?+
Can a ghost immobiliser be detected during an MOT?+
Does a Ghost immobiliser affect my insurance?+
Car Key Lost and Can't Start Your Car?
Ghost immobiliser or not — we cut and programme replacement car keys for all makes. And if the Ghost has locked you out of your own car (forgotten PIN), we can point you to an approved installer who'll reset it.