How to Protect Your Car From Keyless Theft (2026 Guide)
If your car has keyless entry or push-button start, it can be driven away in under a minute without the thief ever touching your key. It's called keyless (relay) theft, and it's now the single most common way modern cars are stolen in the UK. The good news: it's also very preventable once you understand how it works.
How keyless theft actually works
Your key fob is always quietly broadcasting a short-range signal. Thieves work in pairs: one stands near your house with a relay device that captures that signal — even through a wall or a front door — and "relays" it to a second device held by the car. The car is fooled into thinking the key is present, unlocks, and starts. No forced entry, no broken glass, no alarm.
Because nothing is damaged, many owners don't even realise how the car went — and a standard factory alarm does nothing, because to the car everything looks completely normal.
The practical steps that help
- Keep keys in a Faraday pouch — a signal-blocking pouch stops the fob being relayed overnight. Cheap and effective as a first layer.
- Store keys away from doors and windows — the further the fob is from the street, the harder it is to reach.
- Use a steering lock or wheel clamp — a visible deterrent that slows a thief down.
- Park defensively — on a driveway, behind another car, or under a camera where possible.
These all help — but they rely on you remembering them every single night, and a determined thief can work around most of them. For real peace of mind you want something that stops the car being driven even if the signal is relayed.
The strongest stop: an app-controlled immobiliser
An immobiliser breaks the one link a thief can't fake. IMMOSTOP places two independent immobilisation points on your vehicle that must both be released before it will start — and they only release when your authorised phone is present. So even with a perfectly relayed or cloned key, the car simply won't move for anyone but you.
Because it's controlled by your phone, there's nothing to remember: it arms itself as you walk away and disarms as you return. And it works in the background with the app closed. See exactly how it works →
Keyless theft targets the signal. IMMOSTOP protects the one thing a thief can't copy — your phone. Order yours, professionally fitted →
More on vehicle security
- What is a relay attack — and how do you stop it?
- Immobiliser vs tracker: which actually stops car theft?
- How IMMOSTOP works
- Compare IMMOSTOP vs trackers, steering locks & aftermarket immobilisers
- Order IMMOSTOP (£349 all-in, fitted)
- Car immobiliser fitting in your area
- Autosecureshop — vehicle security specialists