Are Ghost immobilisers legal in the UK?

Yes. Fitting an aftermarket immobiliser such as the Autowatch Ghost to a vehicle you own is entirely legal in the UK, and it always has been. Nobody needs permission, there is nothing to register with the DVLA, and there is no offence involved in making your own car harder to steal.

That is the whole answer to the question as asked. But people almost never ask it in isolation, so here are the four things they are usually asking about underneath it.

Will it fail an MOT?

No. An MOT tests roadworthiness: brakes, tyres, lights, emissions, structure and so on. A hidden immobiliser is not part of that test and does not appear on it.

The only way aftermarket electrics cause an MOT problem is if they have been installed so badly that they interfere with something that is tested, such as lighting. That is an argument about installation quality rather than legality, and it is one of several reasons the fitting matters more than people expect.

Will it affect my manufacturer warranty?

This is the real question hiding inside the legal one, and it deserves a careful answer rather than a confident one.

What we fit is designed to sit alongside the vehicle’s own electronics, and we do not cut into things we should not. On a Ghost specifically, it works mainly through the car’s existing data networks, with a conventional circuit cut only where a particular vehicle needs one, which is a large part of why it leaves so little trace.

That said, manufacturers word their warranties differently, and some are more relaxed about aftermarket electrical work than others. We are not going to tell you your warranty is definitely unaffected, because that is a claim about somebody else’s contract and we have not read yours. A quick call to your dealer before you book is worth the five minutes, and we are happy to talk through exactly what is involved so you can describe it accurately.

Do I have to tell my insurer?

You should, and it is usually to your advantage anyway.

Insurers generally want to know about modifications and security changes, and an immobiliser is the kind of change most of them are pleased to hear about. Failing to declare things can create problems at claim time that are entirely avoidable.

We have written a fuller piece on whether and how to tell your insurer, including what to say and what they tend to ask.

Worth knowing separately: an immobiliser being recognised by an insurer is not the same as it being required by them, and neither guarantees a cheaper premium. We go through that properly in whether insurers recognise the Ghost.

What happens when I sell the car?

The immobiliser stays with the vehicle. It is wired in, it is not a bolt-on accessory, and removing it would be a job in itself.

What has to happen is that the new owner gets their own code rather than inheriting yours. Tell us when the car is being sold and we will sort the handover properly.

It is also worth mentioning in the advert. On the kind of vehicle that gets targeted, a documented immobiliser fitted by an accredited installer is a genuine selling point, and it is the sort of detail a careful buyer notices.

One thing that genuinely is not allowed

Fitting security to a vehicle that is not yours, or that you hold on finance or lease without checking, is a different matter.

On a lease or PCP the vehicle belongs to the finance company until it does not, and their agreements often have conditions about modifications. That is a contractual issue rather than a criminal one, and it is easily resolved by asking them first. Most are perfectly happy with security work, and some encourage it. Ask before rather than after.

In short

Legal, MOT-irrelevant, and generally welcomed by insurers. The two things worth doing before you book are a quick check with your dealer about the warranty wording, and a word with the finance company if the car is not yet fully yours.

If you want to talk any of that through before committing, tell us the make, model and year and we will give you a straight answer.