Mobile Auto Locksmith
Extra Immobiliser Fitting
Your factory immobiliser trusts a valid key. That is the problem: once a thief has produced a key at the OBD port or relayed your fob, the car considers the theft authorised and starts normally.
An additional immobiliser sits outside that logic. It interrupts the vehicle until a step only you know or hold is completed, so a copied or relayed key is no longer enough to drive away. It is quiet, it does not change how you use the car day to day, and it is fitted at your vehicle.
- Blocks drive-away theft even with a copied key
- Independent of the factory immobiliser
- Discreet installation
- Suits keyless, high-risk and van models
- No change to normal daily use
- Fitted at your home or workplace

Why a second immobiliser works
Most modern vehicle theft is an authorisation attack, not a mechanical one. Adding a barrier the vehicle manufacturer never published means there is no standard bypass for it, and the time and uncertainty involved is usually enough for a thief to leave the vehicle alone.
How you use the vehicle afterwards
Day to day the car behaves as normal for you. The extra step is designed to be quick and habitual — the inconvenience should be measured in seconds, not in dreading getting into your own vehicle.
Which vehicles benefit most
Keyless-entry cars, models with known theft patterns, and work vans carrying tools benefit most. Send your registration and we will tell you honestly whether an extra immobiliser is the right spend for your vehicle or whether something simpler covers you.
Ghost immobilisers and aftermarket alternatives
A ghost immobiliser is the best-known example of this type of product: a device that requires a sequence on the vehicle's existing buttons before the engine will start, with no key fob and nothing for a scanner to find. Other aftermarket immobilisers work with a separate tag or a hidden switch instead. Tell us your registration and how the vehicle is used and we will explain which approach suits it and what fitting involves.
Extra Immobiliser Fitting FAQs
Will an extra immobiliser affect my vehicle's electrics?
Fitting is planned around your vehicle's wiring. Tell us the registration and we will discuss the installation approach before any work is agreed.
Does it stop relay theft?
It is designed to stop the drive-away. Even where a fob signal has been relayed, the vehicle will not start until the additional step is completed.
Can it be fitted at my home?
Yes. This is mobile work carried out at your vehicle across East London, Essex and surrounding areas.
What is a ghost immobiliser?
It is an aftermarket immobiliser that requires a PIN-style sequence on the vehicle's existing buttons before it will start. There is no extra fob, and it cannot be found by scanning for a signal.
Will an extra immobiliser reduce my insurance premium?
That is entirely down to your insurer. Ask them before fitting if premium is your main reason — we will not promise a discount on their behalf.
Ask About An Immobiliser
Only Car Key provides mobile car key replacement, spare keys, vehicle unlocking and key programming across East London, Essex and surrounding areas.
For vehicle security, proof of ownership or authority to access the vehicle may be requested before locksmith work is carried out.
