Keyless entry was meant to make life easier. For thousands of UK drivers, it has quietly made their car easier to steal.
Relay theft — the technique used to steal keyless cars in under a minute — has become one of the most common ways vehicles disappear from driveways across Norfolk, Suffolk and Cambridgeshire. The thieves don’t need your key, they don’t need to break a window, and they rarely make a sound.
The good news is that keyless car theft is largely preventable. Not with one magic gadget, but with a sensible, layered approach that makes your vehicle far more trouble than it’s worth. This guide explains exactly how relay attacks work, how to tell whether your car is at risk, and which protection genuinely earns its place — starting with the changes that cost nothing.
What Keyless Car Theft Actually Is
Keyless car theft is usually a relay attack, sometimes called relay theft. It exploits the way keyless entry and push-button start work.
Your key fob is constantly broadcasting a short-range signal. When the fob comes near the car, the vehicle recognises it and unlocks. Once you’re inside, the car detects the fob and lets you press start. You never touch a button — that’s the whole point of “keyless”.
Thieves turn that convenience against you. A relay attack typically involves two people and two devices:
- One thief stands near your house — by the front door, a window, or the wall closest to where your keys sit indoors. Their device picks up the faint signal from your fob, even through a wall.
- The second thief stands by your car with a paired device. The first device relays your key’s signal to the second, tricking the car into thinking the fob is right there.
The car unlocks, the engine starts, and they drive off. The whole thing can take 30 to 60 seconds, and it happens most often late at night when the car is parked close to the house.
The uncomfortable truth is that the relay kit needed to do this is cheap and easy to buy online. This isn’t a rare, sophisticated crime any more — it’s an everyday one.
Is Your Car Actually at Risk?
Not every car is vulnerable to relay theft, so it’s worth checking before you spend a penny.
You are at risk if you can unlock your car simply by walking up to it with the fob in your pocket or bag, and start the engine with a button rather than a turned key. That’s genuine keyless entry, and it’s the target.
You are not at risk from relay theft if you have to physically press a button on the fob to unlock the car, and turn a key in the ignition to start it. That older style of remote can’t be relayed in the same way — although it can still be vulnerable to other methods, which we’ll come to.
Relay theft affects a huge range of makes, not just premium models. Popular family cars, SUVs and — very heavily — vans are all targeted. If your vehicle has a keyless system, assume a thief could exploit it and plan accordingly.
It’s also worth checking your car’s independent security rating from Thatcham Research, the UK body that assesses vehicle security for insurers. A “Poor” rating tells you the factory system has a known weakness, which is a strong signal that you need to add your own protection.
The Smartest Approach: Layered Defence
There is no single product that makes a car un-stealable. Anyone selling you that idea is overselling it.
What actually works is layering. Each layer adds time, noise or difficulty, and a determined thief will move on the moment your car becomes harder work than the next one. Think of it as four layers, from free habits up to professional-grade security.
We’ll go through them in order, so you can start with what costs nothing and add layers based on your vehicle’s value and where you park.
Layer 1: Free Habits That Genuinely Help
Before you buy anything, change a few habits. These cost nothing and remove the easiest opportunities.
Keep your keys away from doors and windows. The relay device has to “hear” your fob. The further your keys sit from the outside wall — especially the wall nearest your driveway — the weaker the signal it can grab. Don’t leave keys on a hallway table by the front door or on a windowsill. Move them to the middle of the house.
Turn off your fob’s signal if it lets you. Many modern fobs can be put into a “sleep” or motion-sensing mode that stops them broadcasting when they’ve been still for a while. Check your handbook. If your fob supports it, this single setting can neutralise a relay attack overnight.
Park defensively. If you have a garage, use it. If you have a driveway, park nose-in and close to the house, and if you own two cars, box the more desirable one in behind the other. On the street, choose well-lit spots covered by a camera or a neighbour’s line of sight.
Test any signal blocker before you trust it. More on Faraday pouches below — but whatever you use, always test it works before relying on it.
None of this requires a locksmith. It simply makes you a less convenient target than the driver next door.
Layer 2: Low-Cost Physical Deterrents
The next layer is cheap kit that adds a visible or practical obstacle.
Faraday pouches (signal-blocking pouches)
A Faraday pouch has a metal lining that blocks your fob’s signal. Drop the key inside, seal it, and a relay device can no longer pick up the broadcast.
They cost only a few pounds and they do work — but with two important caveats. First, they only protect you if you actually use the pouch every single time. One forgotten night is all a thief needs. Second, cheap pouches wear out; the lining can crease and fail. Test yours by putting the key inside, sealing it, and walking up to your car. If the car still detects the key, the pouch isn’t doing its job.
Treat a Faraday pouch as a useful habit-based layer, not a complete solution. It relies entirely on you remembering.
Steering wheel locks and wheel clamps
An old-fashioned steering lock or wheel clamp can’t be defeated by electronics, which is exactly why it works against relay theft. A thief who has relayed their way into your car still can’t drive it away if the wheel won’t turn.
These are visible deterrents. Many relay teams will simply skip a car that clearly has a physical lock fitted, because it turns a 60-second job into a noisy, time-consuming one.
OBD port protection
Some thieves skip the fob entirely and break in to reach the on-board diagnostics (OBD) port, then plug in a device to programme a fresh key to your car. An OBD port lock or cover adds a barrier to that method. It’s a worthwhile extra if your model is known to be targeted this way.
Physical deterrents are affordable and effective, but they depend on you fitting them every time. For proper, always-on protection, you need the next layer.
Layer 3: An Electronic Immobiliser (the Strongest Deterrent)
If you want protection that works whether or not you remember a pouch or a wheel lock, this is where it lives.
An aftermarket immobiliser like the Autowatch Ghost stops the car being driven unless a personal sequence is entered — a PIN made using the existing buttons on the steering wheel, door panels or centre console. Even if a thief relays their way in and gets the engine to turn over, the car won’t move without that code.
The reason it’s so effective against relay theft in particular is that it doesn’t rely on your key at all. There’s no fob signal to intercept and no radio to jam, because the Ghost communicates directly with the car’s own systems. It’s silent, invisible and gives thieves nothing to attack.
For most drivers worried about relay theft, a professionally installed immobiliser is the single most reliable upgrade — because it removes the human error that makes pouches and locks unreliable. There’s nothing to remember. It’s simply always on.
This is exactly the kind of work our team fits day in, day out. If you’d like to talk it through for your specific vehicle, get in touch with Autowagon and we’ll explain your options in plain English.
Layer 4: A Tracker for Fast Recovery
The final layer doesn’t prevent theft — it helps you get the car back if the worst happens.
A quality GPS vehicle tracker lets you and the police pinpoint the car’s location in real time. Recovery rates for tracked vehicles are far higher, and recovery tends to be much faster, which also limits the damage a thief can do while they have your car.
Trackers pair perfectly with an immobiliser. The immobiliser makes the car extremely hard to drive away in the first place; the tracker means that even a well-organised theft has a short shelf life. Together they turn a stolen-car nightmare into, at worst, a short-lived inconvenience.
Many drivers add a tracker because their insurer asks for one on higher-value vehicles — which brings us neatly to insurance.
Where Car Insurance Fits In
Two questions come up constantly: will insurance pay out for keyless theft, and can good security save me money? Both matter.
Will your insurer cover relay theft? Most comprehensive UK policies do cover keyless theft, including relay attacks — but only if you took reasonable care. If you left the fob in the car, near an unlocked door, or ignored an obvious weakness, an insurer can reduce or refuse the claim on grounds of negligence. Read your policy wording and know your obligations before anything happens, not after.
Can security lower your premium? Often, yes. A Thatcham-approved immobiliser or tracker can reduce premiums on higher-value vehicles and, in some cases, is a condition of cover being offered at all. Beyond the premium, decent security simplifies any future claim because you can show you took theft seriously.
The practical takeaway: security isn’t only about preventing theft, it’s about protecting your position with your insurer too.
A Special Warning for Van and Commercial Drivers
If you drive a van for work, pay particular attention. Light commercial vehicles are stolen at strikingly high rates, and they’re doubly attractive because thieves get the vehicle and the tools inside.
For a tradesperson, a stolen van isn’t just an insurance claim — it’s days of lost income and a boot full of expensive kit gone overnight. The layered approach matters even more here: an immobiliser to stop the van being driven off, a tracker for recovery, and sensible habits around where you park and store the keys.
We regularly secure vans and commercial vehicles across the region, so if your livelihood is parked on your driveway each night, it’s worth protecting properly.
What to Do If You Think You’ve Been Targeted
Sometimes there are warning signs before a theft, or clues that someone has tried.
Be alert to a car that’s been unlocked when you’re sure you locked it, items disturbed inside, or unfamiliar people lingering near vehicles late at night — especially anyone holding a device close to your house wall. If you catch anything on a doorbell camera or CCTV, keep the footage.
If your car is actually stolen, report it to the police immediately on 101 (or 999 if the theft is happening now), give them your tracker details if you have one, and inform your insurer. The faster you act, the better your chances of recovery.
Then, once the dust settles, close the gap that let it happen. If you were relying on a pouch you forgot to use, that’s a sign you need an always-on layer instead.
Frequently Asked Questions
Does a Faraday pouch really stop keyless car theft?
A good, undamaged Faraday pouch does block your fob’s signal and prevent a relay attack — but only when you use it. It relies entirely on you sealing the key inside every time, so it’s best treated as one habit-based layer rather than complete protection. Always test the pouch by checking your car won’t detect the key while it’s inside.
Which cars are most at risk from relay theft?
Any vehicle with genuine keyless entry and push-button start is a potential target, from everyday family cars to SUVs and vans. Higher-value models and popular vans tend to be targeted most, but thieves choose opportunity over badge — an easy car on a dark driveway is more attractive than a hard one, whatever the make.
Is a Ghost immobiliser worth it?
For drivers genuinely worried about relay theft, an immobiliser is usually the most reliable single upgrade because it works without any effort on your part. There’s no pouch to remember and no signal for thieves to intercept — the car simply won’t drive without your personal sequence. It’s especially worth it on vehicles with a poor factory security rating or a high replacement cost.
Will turning my key fob off protect my car?
If your fob supports a motion-sensing sleep mode, enabling it is one of the most effective free steps you can take, because a sleeping fob broadcasts nothing for a relay device to grab. Not every fob offers this, so check your handbook. Where it’s available, use it alongside keeping keys away from external walls.
Can my keyless car be stolen even if I park on my driveway?
Yes. Driveway parking close to the house is actually where many relay thefts happen, because your keys indoors are within range of a relay device outside. Parking in a garage, moving keys deeper into the house, and fitting an immobiliser all reduce this risk significantly.
The Bottom Line
Keyless car theft feels frightening because it’s silent and fast — but it’s also very beatable. Start with the free habits, add affordable physical deterrents, and for real peace of mind, fit an always-on immobiliser backed by a tracker. Each layer buys time, and time is exactly what a thief doesn’t have.
At Autowagon, we install professional-grade immobilisers and trackers for cars, vans, motorcycles and HGVs across Norfolk, Suffolk and Cambridgeshire, fitted at your home or workplace. If you’d like straightforward advice on the right protection for your vehicle — with no pressure and honest pricing — contact our team today or call us on 07395 328717. We’ll help you make your car the one thieves leave alone.