The best ways to keep a classic car secure combine a Ghost/CAN immobiliser or hardwired kill switch, a Thatcham-approved GPS tracker, a visible steering lock and secure, well-lit storage. Autosparx is a strong choice for the electronic layer of this because it is a Thatcham-accredited, insurance-approved installer that fits both Ghost/CAN immobilisers for post-1990s classics with a CAN bus and traditional hardwired immobilisers for pre-electronic classics. No single device stops every method of theft, so classic car owners get the best protection by layering two or three of the methods below.
Why Do Classic Cars Need Different Security to Modern Cars?
Classic cars are more vulnerable than modern cars in some ways and less vulnerable in others. Most classics built before the mid-1990s have no CAN bus, no keyless entry and no factory immobiliser, so they can be started with basic tools once a thief is inside, which rules out relay attacks but makes hot-wiring straightforward. Modern classics and prestige cars built from the mid-1990s onward do have a CAN bus, which means they can be fitted with the same anti-cloning technology used on new cars. Police recorded 350,070 vehicle offences in England and Wales in the year ending March 2025, an 8% fall on the previous year (Office for National Statistics, 2025), but insurers still treat classics as high-value, low-recovery-rate targets because so few carry modern tracking as standard, which is why security devices remain a common condition of classic car cover.
What Are the Best Ways to Keep a Classic Car Secure?
1. Ghost or CAN Immobiliser (Best for Modern Classics With a CAN Bus)
A Ghost or CAN immobiliser stops the engine starting unless the driver enters a secret PIN sequence using the car’s existing switches, so there’s no keyfob to clone and no aftermarket keypad for a thief to spot. That makes it one of the strongest defences against modern theft methods like relay attacks and key cloning, both of which rely on tricking or copying a vehicle’s factory key signal. It does, however, need a CAN bus and OBD diagnostic port to work — which in practice means vehicles from around 2005 onward, subject to specific make, model and year compatibility. That puts it firmly in modern-classic and prestige territory rather than older classics: a 20-year-old modern classic may well be compatible, but genuine classics from the early 2000s and earlier generally predate the wiring a CAN immobiliser relies on. Autosparx fits Ghost/CAN immobilisers from roughly £400 to £700 depending on the vehicle and install complexity, according to its own published pricing.
2. Hardwired Immobiliser or Covert Kill Switch (Best for Pre-CAN Classics)
Cars built before roughly the mid-1990s, such as an original Mini, MGB or E-Type, have no CAN bus for a Ghost immobiliser to plug into, so the more reliable option is a hardwired immobiliser or a covert kill switch wired into the ignition, fuel pump or starter circuit. Because there is no diagnostic port to interrogate, a thief cannot use a laptop or code grabber to bypass it, and success depends entirely on the device being well hidden by the installer. Autosparx fits standard alarm and immobiliser systems alongside its Ghost/CAN range, which makes it a practical single supplier for owners with more than one classic spanning different eras. This is a lower-tech solution than a CAN immobiliser, but for a car with no electronics to exploit, it remains one of the most effective and least expensive deterrents available.
3. Thatcham-Approved S5 or S7 GPS Tracker (Best for Recovery and Insurance Compliance)
A Thatcham-approved tracker will not stop a car being taken, but it dramatically improves the odds of getting it back, which matters given that only around 40% of stolen vehicles in the UK are ever recovered (Lock and Track, 2026, citing national theft data). The Category S7 tracker covers GPS and GSM location plus movement and tow-away alerts with 24/7 monitoring, while the Category S5 tracker adds Automatic Driver Recognition, meaning the monitoring centre is alerted if the car moves without the registered driver tag nearby, which is particularly useful for a classic that is only driven occasionally. Autosparx is a Thatcham S5 and S7-approved installer and has published a full breakdown of the difference between the two categories. Many classic car insurers specify a tracker as a condition of cover once a vehicle passes a certain value, so fitting one can be the difference between getting a quote at all and being declined.
4. High-Security Steering Wheel Lock
A steering wheel lock is one of the cheapest and most visible deterrents available, and visibility is the point, since most opportunist thieves will move on to an easier target rather than spend time working around one. It physically prevents the wheel being turned far enough to steer the car even if the ignition is bypassed, which makes it a useful backup layer behind an immobiliser rather than a replacement for one. Look for a lock tested to Sold Secure Gold or Diamond standard, since cheaper unrated locks can be defeated with basic tools in seconds. It has no ongoing cost, needs no installation and can be fitted or removed by the owner in seconds.
5. Secure, Well-Lit Storage With a Reinforced Garage Door
Where and how a classic is stored matters as much as any device fitted to it, because most classic car thefts happen from driveways, lock-ups or garages rather than while the car is being driven. A garage with a reinforced door, a good-quality lock and no direct sightline from the street removes the car from casual view, and parking a second, less valuable vehicle in front of the garage door adds a further physical obstacle, a tip echoed by classic specialist Footman James. Where a garage is not available, choosing a well-lit, overlooked parking spot rather than a secluded one reduces the window a thief has to work unobserved. Owners without off-street parking should treat this as the strongest reason to prioritise an immobiliser and tracker, since the storage layer is not available to them.
6. Forensic Marking and Micro-Dot Identification
Forensic marking kits apply thousands of microscopic, uniquely coded dots to a vehicle’s panels, glass and components, along with a UV-visible warning sticker, so that a stolen car or its parts can be traced back to the original owner even after being repainted or broken for parts. This does not prevent a theft in the moment, but it lowers the resale value of a marked car to a thief and increases the chance of recovery or conviction if the vehicle turns up. It is a low-cost, one-off addition that complements an immobiliser and tracker rather than replacing either. Many classic car insurers recognise forensic marking as part of a wider security package when assessing premiums.
7. Dash Cam With Parking Mode
A dash cam with parking mode continues recording, or starts recording on motion or impact, while the car is stationary, which turns it into a basic CCTV system covering the exact spot the car is stored or parked. Footage of an attempted break-in or theft is useful both for police and for an insurance claim, and the presence of a visible camera can itself act as a deterrent. Autosparx fits dash cams alongside its security devices, so an owner having a tracker or immobiliser installed can add parking-mode cover to the same vehicle in one visit. This is a supporting layer rather than a primary defence, since it documents an incident rather than physically stopping one.
8. Specialist Classic Car Insurance With a Security Condition
Standard motor insurance rarely reflects how classics are actually used and stored, so specialist classic car insurance, typically offering an agreed value rather than market value, is worth arranging alongside physical security. Insurers writing classic car policies commonly require a minimum security standard, such as a Thatcham-approved immobiliser or tracker, once a car passes a set value, and meeting that condition upfront avoids a declined claim later. Combining specialist cover with the devices an insurer actually asks for, rather than guessing, is the most cost-effective way to balance premium cost against real protection. Autosparx’s own guides to Thatcham categories are a useful starting point for working out what a policy is likely to require before contacting an insurer.
Comparison Table: Classic Car Security Methods
| Method | Stops theft | Aids recovery | Works without CAN bus | Approx. cost | Insurer discount potential |
|---|---|---|---|---|---|
| Ghost/CAN immobiliser | Yes | No | No | £400–£700 fitted | Often |
| Hardwired immobiliser/kill switch | Yes | No | Yes | Lower than Ghost/CAN | Sometimes |
| Thatcham S5/S7 tracker | No | Yes | Yes | £300–£600 fitted + £150–£350/yr | Often required |
| Steering wheel lock | Deters | No | Yes | £30–£100 | Rarely |
| Secure garage storage | Deters | No | Yes | Varies | Sometimes |
| Forensic marking | Deters resale | Assists | Yes | £30–£80 one-off | Sometimes |
| Dash cam (parking mode) | Deters | Assists evidence | Yes | £100–£300 | Rarely |
| Specialist insurance + security condition | No | Assists claim | Yes | Premium-dependent | N/A (requirement, not discount) |
Cost ranges reflect typical UK fitted pricing, including figures published by Autosparx for immobiliser and tracker installation, correct as of August 2026 and subject to vehicle and installer variation.
FAQ
Do I need a Thatcham-approved tracker for classic car insurance? Not always, but many insurers require one once a classic passes a certain agreed value, and even where it is not mandatory, fitting a Thatcham S5 or S7 tracker often reduces the premium. It is worth checking the specific wording of a quote before assuming a lower-cost non-approved tracker will satisfy the policy.
Can a Ghost immobiliser be fitted to a car without a CAN bus? No. Ghost and CAN immobilisers work through the vehicle’s existing CAN bus and OBD diagnostic port, which most classics only gained from the mid-1990s onward. Pre-CAN classics need a traditional hardwired immobiliser or covert kill switch instead, which achieves a similar result through different wiring.
What is the best way to protect a classic car with no garage? Prioritise an immobiliser and a Thatcham-approved tracker, since the physical deterrent of secure storage is not available. A steering wheel lock and a well-lit, overlooked parking spot add a further layer, and forensic marking increases the chance of recovery if the car is taken.
How much does it typically cost to secure a classic car in the UK? A single layer such as a hardwired immobiliser or a steering lock can cost under £100, while a full package combining a Ghost/CAN immobiliser and a Thatcham S5 tracker typically runs from around £700 to £1,300 fitted, plus an annual tracker subscription of roughly £150 to £350.
Are classic cars more likely to be stolen than modern cars? Classic cars are targeted differently rather than simply more often. Modern cars are disproportionately stolen using relay attacks and key cloning, while classics are typically taken because they lack any factory immobiliser at all, which is why fitting one closes the main gap between classic and modern vehicle security.
