Vehicle security from
£199
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- Free, no obligation
- Fitted, not posted
- 12 months hardware warranty
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MOT history
Pick the level of protection
Every option is fitted by an approved installer. Choose one to see the exact devices.
Immobilisers only for
Hidden engine block. Nothing to see, nothing to record.
CAN BUS Immobiliser
PIN CODE Car Immobiliser LockCar CAN-IMMO – Free Fitting
£299.00 £350.00
PIN CODE to START – NO PIN. NO START – LOCKCAR CAN-IMMO Immobiliser – Smart Advanced CAN Bus Vehicle Immobiliser – entering the PIN CODE each startup
App + Tag Immobiliser
TAG FOB Car Immobiliser LockCar IC3262 TAG Immobiliser
£249.00 £299.00
TAG FOB KEY to START – NO FOB. NO START – LOCKCAR IC3262 Immobiliser – Smart Immobiliser – authorizes the car to start if it detects the fob…
Immobilisers + Dashcams for
Block the theft and record what happens around the car.
Dashcam + Immobiliser + App
Dashcam + Immobiliser LockCar One – Free Fitting
£450.00 £550.00
LockCar ONE is a professional dash camera with 24/7 monitoring, SD recording, and smart immobiliser integration. Built for security, durability, and total control in the UK.
Dashcam + Immobiliser + App
Dashcam + immobiliser Lockcar Duo Rh – Free Fitting
£550.00 £650.00
Local MCU system security. Power ON 24/7. Smart parking mode. Local car status, Immobilization, Local GPS Traking, Local Cameras Front + Driver. FREE UK INSTALLATION
4G Live Dashcams + Immobilisers for
Live view and alerts from anywhere, plus the engine block.
4G + Dashcam + Immobiliser + App
Dashcam + Immobiliser + Tracker LockCar One Plus 4G- Free Fitting
£499.00 £600.00
LockCar One Plus is 4G remote access and intelligent immobiliser. Designed for modern threats, this advanced anti-theft system allows you to monitor and control your car from anywhere,…
4G + Dashcam + Immobiliser + App
4G Daschcam + Immobiliser + Tracker Lockcar Duo Rh Plus 4G – Free Fitting
£699.00 £750.00
Remote access via 4g permanently. Power ON 24/7. Smart parking mode. Real-time car status, Immobilization, Real-time GPS Traking, Live Cameras Front + Driver. FREE UK INSTALLATION
Where should we fit it?
We come back with the theft method known for your model, what we would fit, the price with fitting, and the nearest slot to you. One message, no sales calls.
Got it – check your inbox
We have your registration and what you picked. We will come back to you shortly.
Message us on WhatsAppCar security system UK: relay, CAN bus, and everything in between
A car security system has three jobs: stop the engine starting for someone who cannot authorise, tell you if the vehicle moves, and let you see what happened. LockCar builds units for all three. Some interrupt an engine circuit through a physical relay. Others sit on the vehicle’s CAN bus, LIN bus or ADC bus. Which one goes on your car depends on the car, not on which one we prefer selling.
The car is not broken into, it is talked into it
Almost every modern vehicle theft in the UK works the same way. The thief does not defeat the factory immobiliser, the thief satisfies it. A relay attack extends your key’s signal from the hallway to the driveway, and the car concludes the key is present. A device at the diagnostic port writes a fresh key the car then treats as genuine. In both cases the factory security did exactly what it was designed to do and the car still left.
This is why an alarm, a tracker or a steering lock does not close the gap on its own. An alarm announces a theft already in progress. A tracker helps after the fact, and recovery rates for stolen cars in the UK are poor. Neither stops the engine turning over.
A second, hidden authorisation is not part of the conversation the thief is having with your car. Satisfying the factory system gains them nothing, because something else is still holding the start.
Do these first, before you buy anything
A fair amount of vehicle theft is prevented by things that cost nothing. If you do these and decide you do not need a device after all, that is a good outcome and we would rather you reached it honestly.
Turn off the key, or shield it
Most keyless fobs made since about 2018 sleep after a period of stillness, which defeats a relay attack outright. Check your handbook for the button combination. If yours has no sleep function, a signal blocking pouch costs a few pounds. Test it: put the key in the pouch, walk to the car, and confirm the doors stay locked.
Change where the car sits
Park the higher value vehicle behind the lower value one on a driveway. Turn the wheels into the kerb. Keep keys away from the front door and away from the letterbox. None of this is glamorous and all of it removes easy options.
Use the lock you already own
A visible steering lock is a poor security device and an excellent deterrent, because it signals that this particular car will take longer than the next one. Thieves working a street pick the fastest job. Being slightly slower is often enough.
Two ways to block a start, and we build both
There is a lot of noise online about whether an aftermarket immobiliser should touch the vehicle’s data network. The honest answer is that both approaches work, both are used by reputable manufacturers, and the right choice depends on the vehicle in front of you. We make units of both types for exactly that reason.
Relay based units
A physical relay is wired into an engine circuit, typically the fuel pump, the starter or the ignition feed. Armed, the circuit is open and the engine will not run. Disarmed, it closes and the car behaves normally. There is no data connection to the vehicle’s network at all. This makes relay units genuinely universal: they go on anything running 12V or 24V, including older vehicles, vans, HGVs, motorhomes and plant where no useful bus data exists.
Bus level units
The LockCar CAN-IMMO joins the vehicle’s own network and holds the start condition until it recognises your authorisation. It supports CAN bus, LIN bus and ADC bus, which matters on newer vehicles where discrete circuits have been consolidated and there is simply less physical wiring to interrupt. Because the module is already talking to the car, it can also use buttons that exist in the cabin for your backup sequence, with no extra hardware added anywhere.
Older or commercial vehicle, or one where we can reach a clean engine circuit: relay. Recent, heavily multiplexed vehicle, or one where you want authorisation through existing cabin buttons: bus level. Send the registration and we will tell you which, and why.
What neither approach will do for you
Anyone selling you a device that never fails is selling you something else. Here is where each approach genuinely runs out, so you can weigh it before you spend.
Nothing stops a flatbed
A crew with a recovery truck can take any vehicle, whatever is fitted to it. An immobiliser stops the car being driven away, which covers the great majority of thefts, but it is prevention rather than a guarantee. If tow away is a real risk for your vehicle, you want tracking as well.
Relay units need somewhere to sit
On some recent vehicles the circuits a relay would traditionally interrupt have been consolidated into modules, and the clean interruption point is harder to find. On those cars the bus level unit is the better engineering answer, and we will say so rather than force a relay into a car that does not suit one.
Bus level units need checking first
A device that joins the vehicle network has to be programmed for that specific vehicle, so compatibility is confirmed before booking rather than discovered on the driveway. If your car is still under manufacturer warranty, we will tell you exactly what we intend to connect to so you can put a specific question to your dealer.
No aftermarket immobiliser is insurance approved by default. If your insurer or broker has asked for a specific certification or scheme membership, check what they will accept in writing before you buy from anyone, including us.
The approaches, side by side
This compares three approaches to the same problem, not one manufacturer against another. Every aftermarket immobiliser on the UK market sits in one of the two right hand columns.
| Consideration | Factory system alone | Relay based immobiliser | Bus level immobiliser |
|---|---|---|---|
| Key signal relayed from the house | ✗ Car starts | ✓ Start blocked | ✓ Start blocked |
| New key written at the OBD port | ✗ Key accepted | ✓ Key alone will not start it | ✓ Key alone will not start it |
| Older vehicle, van, HGV or plant | Varies | ✓ Universal on 12V and 24V | Depends on available bus data |
| Recent, heavily multiplexed vehicle | Varies | Depends on a usable circuit | ✓ Designed for it |
| Connects to the vehicle data network | – | No | Yes, programmed per vehicle |
| Vehicle specific compatibility check needed | – | Rarely | Always, before booking |
| Concealed, no keypad or LED | – | ✓ | ✓ |
| Moves to your next vehicle | ✗ Tied to the car | ✓ Refit chargeable | ✓ Reprogrammable, refit chargeable |
What we build, and what it costs
Prices below are product only. Fitted prices depend on your vehicle and your location, and are quoted before you commit to anything. If you are in the West Midlands, the fitted prices are set out on our Birmingham immobiliser fitting page.
LockCar IS326
Product only. Standalone relay immobiliser with app control, for any 12V or 24V vehicle.
- 20A relay, fuel pump or ignition cut
- No connection to the vehicle data network
- LockCar app control
- Universal fitment, 12V and 24V
LockCar IC3ST
Product only. Relay immobiliser with a proximity tag, so there is nothing to type before a journey.
- Proximity tag disarming, nothing to remember
- App alerts and motion detection
- Anti hijack and valet mode
- No connection to the vehicle data network
LockCar IS357
Product only. Extended proximity range and smartwatch disarming, for owners who want zero interaction.
- Detection range up to 5 metres
- Smartwatch and trust device support
- Bluetooth, no data network connection
- Popular on BMW, Mercedes and Volvo
LockCar CAN-IMMO
Our bus level unit, for modern vehicles. Controlled from your phone, with an optional hands free tag.
- CAN bus, LIN bus and ADC bus support
- Module 48 x 24 x 15mm, concealed
- Backup sequence on existing cabin buttons
- Over the air firmware updates through the app
- Service and valet mode, anti hijack
- Vehicle specific programming, reprogrammable
LockCar ONE
Product only. Dashcam and relay immobiliser in one, recording to local SD with no ongoing fee.
- 24/7 recording with parking mode
- Relay immobiliser built in
- Local SD storage, no subscription to record
- No 4G, no remote access
LockCar ONE Plus
Product only. Immobiliser, GPS tracking and live front and driver cameras in a single unit.
- 4G remote access and remote immobilisation
- GPS and GLONASS tracking with route history
- Automatic immobilisation during preset night hours
- Optional subscription for remote and cloud features
The IS326, IC3ST, IS357 and CAN-IMMO are immobilisers only. None of them includes GPS tracking, 4G or a camera. If you want tracking and live view in the same unit, that is the ONE Plus or another system from the 4G dashcam range.
Not sure which of these your vehicle takes? Run the registration through the LockCar vehicle check first, or read the car immobiliser buyer’s guide if you want the background before you talk to anyone.
Fitted at your address, across the UK
Installation is mobile. The engineer comes to your home or your workplace, which means the vehicle never sits overnight somewhere you cannot see it. Most of our own fitting is done across the West Midlands, and the rest of the country is covered through the installer network.
West Midlands, fitted by us
Every B postcode, with fitted prices published on the Birmingham page, plus Sutton Coldfield and Walsall.
Rest of the UK
Covered through approved installers. Send your registration and postcode and we will tell you who is nearest and what the fitted price comes to before you commit.
Trade and fleet
Automotive electricians can buy the range directly. If you fit vehicle security for a living and want access to the bus level units, register through become an installer.
Who you are dealing with
You are letting somebody take part of your dashboard apart. It is reasonable to want to know who they are first.
Rated 5.0 on Google
15 reviews at the time of writing, all from customers whose vehicles we have fitted. You can read every one of them, unedited, on our Google Business Profile.
A registered company
LockCar trades as a company registered in England and Wales, company number 14346129. Our terms are published in full in our terms and conditions.
Mobile only, on purpose
We have no public workshop. Every installation we carry out ourselves happens at your address, and our registered office is administrative, so please do not turn up there with a vehicle.
Frequently asked questions
What does a complete car security system in the UK cost?
Product only, the range runs from £129 for an entry level relay immobiliser to £259 for the ONE Plus with tracking and cameras. Fitting is quoted separately because it depends on the vehicle and where you are. Across the aftermarket generally, expect anywhere from around £150 to £700 fitted depending on the technology involved.
Is a CAN bus immobiliser safe for my car?
Fitted correctly by someone who has confirmed compatibility for your specific make, model and year, yes. Bus level immobilisers are a mainstream, widely used technology in the UK. The risk is not the approach, it is a bad installation, which is equally true of relay units. Ask any installer what they intend to connect to on your vehicle, and be wary of anyone who cannot answer clearly.
Should I choose a relay unit or a bus level unit?
It depends on the vehicle. Older cars, vans, HGVs and plant usually suit a relay unit, which needs no data connection and fits almost anything on 12V or 24V. Recent, heavily multiplexed vehicles often suit the CAN-IMMO, which is built for CAN bus, LIN bus and ADC bus. Send the registration and we will tell you which we would fit and why.
Will an aftermarket immobiliser affect my manufacturer’s warranty?
Terms vary between manufacturers, and this genuinely is a question for your dealer rather than for us. If your vehicle is still under warranty, ask them before you book. We will tell you exactly what we intend to connect to so that you can put a specific question rather than a general one, which usually gets a much more useful answer.
Do I actually need one, or is my key enough?
If your car is older, not keyless, low on the theft tables and lives in a locked garage, you may reasonably decide no device is worth the money. Try putting your key to sleep, test it, and see whether that settles it. We would rather tell you to save your money than sell you something you do not need.
Does the ONE Plus need a subscription?
The unit works without one. A subscription is optional and covers remote access, real time notifications, live camera viewing and cloud storage. Local functions, including the immobiliser and local recording, continue to work either way.
Can I move a LockCar unit to my next car?
Yes. The relay units transfer straightforwardly and the CAN-IMMO is reprogrammable for a different vehicle. Removal and refitting is charged separately and depends on both vehicles, so ask when you book and we will price it up front.
Send the registration, get a straight answer
Tell us the make, model, year and where you park. You get back which unit we would fit, why, the price, and the nearest slot. If the honest answer is that you do not need one, we will say that instead.
