Ghost Immobiliser or Dash Cam: Which Should Your Fleet Fit First?
Sheriff Subair
If you’ve got budget for one thing across the fleet this year, a ghost immobiliser and a dash cam are probably both on the list. They get compared a lot, but they don’t really compete. One stops a vehicle being driven away. The other proves what happened when something goes wrong on the road.
So the better question isn’t which one is better, it’s where your fleet actually loses money. Answer that and the order you fit them in mostly sorts itself out.
The short answer
Fit a dash cam first if most of your cost comes from claims, disputes and complaints. Fit a ghost immobiliser first if theft or unauthorised use is what keeps you up at night. Most taxi and PCO fleets end up starting with the dash cam. Most rental and dealership fleets end up starting with the immobiliser. Almost everyone ends up with both.
What a ghost immobiliser does, and what it doesn’t
A ghost immobiliser stops the engine starting until a PIN is entered on buttons the vehicle already has. There’s no fob to clone and no signal to intercept, so it defeats relay attacks and key cloning, the methods behind most UK car theft now. It also stops a vehicle being taken out by someone who shouldn’t have it, which matters on any fleet with shift handovers or spare keys floating around.
What it doesn’t do is record anything. It won’t help you with a crash, a fraudulent claim or a passenger complaint. And it won’t stop a vehicle being lifted onto a flatbed. Our ghost immobiliser guide for fleets covers how it works and what fitting a fleet involves.
What a dash cam does, and what it doesn’t
A fleet dash cam records the road, and often the cabin, so you have evidence when there’s a collision, a disputed claim or a complaint about a driver. With a 4G connected camera, footage uploads automatically and you can pull it from the office without anyone touching an SD card, which matters when a vehicle is 40 miles away or the driver has gone off shift.
What it doesn’t do is stop anything. A camera might put off an opportunist, and parking mode can record someone around the vehicle, but it won’t stop a relay attack, and a thief can rip a camera off the windscreen in seconds. Footage of your car being stolen is useful to the police. It isn’t the car back. Our fleet dash cam guide goes through what to look for.
Side by side
| Ghost immobiliser | Dash cam | |
|---|---|---|
| Main job | Stops theft and unauthorised use | Provides evidence for claims and disputes |
| Stops relay attacks and cloned keys | Yes | No |
| Helps with a disputed claim | No | Yes |
| Helps with passenger or driver complaints | No | Yes, especially with a cabin camera |
| Typical cost | £400 to £700 per vehicle, fitted, one-off | Around £11 a month for SD card systems, £15 to £25 for 4G connected |
| Visible to the driver and public | No | Yes |
| Needed for licensing | No | In some areas, for taxi and private hire |
Which to fit first, by type of fleet
Taxi and PCO operators
Start with the dash cam for most fleets. You carry passengers, you’re on the road all day, and the expensive problems tend to be third-party claims, disputed collisions and complaints that can put a driver’s licence at risk. Footage settles those faster than anything else, and in London and some council areas a camera system may be a licensing condition anyway. Check our TfL-approved dash cam FAQ if you operate in London.
The exception is a fleet running a lot of keyless hybrids, parked at drivers’ homes overnight in high-theft postcodes. If you’ve already lost a car or two, the immobiliser moves up the list.
Car rental and car clubs
Start with the immobiliser. Rental cars sit unattended, change hands constantly and are exactly what relay gangs go after. Unauthorised use is a real problem too, from a customer keeping a car past the booking to someone with access to the keys taking it out overnight. Add dash cams after, mainly to settle damage disputes and accident claims.
Dealerships
Start with the immobiliser, mainly for forecourt and demonstrator stock that sits out overnight. Dash cams are useful on demonstrators and courtesy cars, where who was driving and what happened on a test drive can come up in a dispute, but they’re the second layer.
The cost question
The two cost differently. A ghost immobiliser is a one-off spend per vehicle, usually £400 to £700 fitted. A dash cam is cheap to buy but usually has a monthly cost, around £11 per vehicle for SD card systems and £15 to £25 for 4G connected ones.
The maths that matters is what one bad event costs you. A single stolen car means the excess, weeks off the road, lost fares or hire income and the hassle of replacing it. A single disputed claim with no evidence can mean a fault finding, a higher premium at renewal and a driver off the road while it’s sorted. Whichever of those you see more often is the one to protect against first. Our honest take on whether dash cams reduce fleet insurance is worth a read before you count on a premium cut either way.
Why most fleets end up with both
They cover different gaps, so they don’t overlap. The immobiliser stops the vehicle being driven away. The dash cam documents everything that happens while it’s being driven. Add a GPS tracker and you’ve covered the last gap, a vehicle towed or loaded onto a flatbed, which neither of the other two can stop.
That’s the setup most operators settle on: tracking to locate, a dash cam to document, an immobiliser to prevent. Fitting them in the right order just means spending first where you’re losing the most.
A note on recording passengers and drivers
If you fit cameras, especially ones facing into the cabin, you’re processing personal data. Tell drivers and passengers that recording is in place, have a clear policy on who can view footage and how long you keep it, and make sure it fits your licensing authority’s rules. Our fleet dash cam guide covers GDPR for fleets in more detail.
Frequently asked questions
Is a ghost immobiliser better than a dash cam? Neither is better. They do different jobs. A ghost immobiliser stops theft and unauthorised use. A dash cam gives you evidence for claims, disputes and complaints. Which comes first depends on where your fleet loses the most money.
Does a dash cam stop car theft? Not really. It might put off an opportunist and can record what happens around a parked vehicle, but it won’t stop a relay attack, and a thief can remove it in seconds. An immobiliser is what stops the car being driven away.
Does a ghost immobiliser help with insurance claims? Not with accident claims, because it doesn’t record anything. Where it can help is with theft risk, though many insurers don’t formally recognise ghost immobilisers. Check with your insurer or broker.
Should a taxi fleet fit a dash cam or an immobiliser first? For most taxi and PCO fleets, the dash cam, because claims and complaints are the more frequent cost and cameras may be a licensing condition. If you’re losing vehicles to theft, fit the immobiliser first.
Can you fit both at the same time? Yes. They don’t interfere with each other, and fitting them in one visit cuts downtime. Many fleets add a GPS tracker at the same time to cover flatbed theft.
Not sure which your fleet needs first? Book a free consultation with Traknova and we’ll look at where your costs are actually coming from.