9 Practical Ways to Improve Your Car Security

Vehicle security is no longer as simple as locking the doors and relying on a factory alarm. Modern thieves may exploit keyless-entry signals, interfere with remote locking, access a vehicle’s electronic systems or remove the entire car without starting its engine.

The most effective response is layered security. By combining sensible daily habits with physical and electronic protection, you can make your vehicle more difficult to enter, start and remove—and improve your chances of locating it if it is taken.

9 ways to help keep your car secure

1. Understand common vehicle theft methods

Knowing how vehicles are targeted helps you choose security measures that address real vulnerabilities.

Relay theft is one risk for vehicles with passive keyless entry. In a relay attack, criminals use electronic equipment to capture and extend the signal transmitted by a compatible key fob. The vehicle may then behave as though the key is nearby, potentially allowing its doors to be unlocked and the engine started while the actual key remains inside a home or workplace.

Other methods include key cloning, unauthorised access through diagnostic systems, interference with remote-locking signals and conventional theft of the keys themselves. Some vehicles may also be loaded onto a tow truck or trailer without being started.

Because these methods target different parts of a vehicle’s security, relying on one alarm, lock or tracking device leaves gaps. Prevention, deterrence and location tracking each serve a different purpose.

2. Protect keyless-entry fobs from relay attacks

Store keyless-entry fobs away from external doors, windows and shared walls. Keeping them on a hallway table near the front door can make their signal easier to reach from outside.

A properly designed signal-blocking pouch or box can help prevent the fob from communicating with relay equipment while it is stored. Check the product regularly by placing the key inside, closing it completely and confirming that the vehicle does not unlock when you approach it.

Some pouches lose effectiveness through wear, damaged seams or incomplete closure, so periodic testing matters. If your vehicle allows passive entry to be disabled, the owner’s manual may explain how to switch it off when it is not required.

Keep spare keys protected as well. Securing the everyday key while leaving the spare unshielded nearby defeats the purpose.

3. Use a visible steering wheel lock

A steering wheel lock is straightforward, highly visible and useful as a first-line deterrent. It tells a potential thief that stealing the vehicle will require extra time, tools and noise.

Physical locks vary in design and strength, so select one that fits the steering wheel correctly and cannot be removed simply by adjusting the wheel. Use it consistently, including when parking at home. A security device left in the boot provides no deterrent.

A steering wheel lock should not be treated as complete protection. Its main value is adding delay and making the vehicle less appealing to an opportunistic offender. It works best alongside an electronic immobiliser and a hidden tracker.

4. Consider an aftermarket CAN bus immobiliser

A CAN bus immobiliser communicates with the vehicle’s onboard electronic network. Depending on the system and vehicle, it can prevent selected functions—such as engine starting—from operating until an authorised driver completes an authentication step.

This authentication is independent of the ordinary keyless-entry signal, which can add protection if a key signal is relayed or a key is cloned. The device is normally concealed, leaving no obvious control unit for a thief to identify immediately.

GPSBob’s Casper immobiliser options use two different authentication approaches. A sequence-based system requires the driver to enter a private combination using existing vehicle controls before driving. A tag-based system recognises an authorised tag and keeps the immobilisation function active when that tag is absent.

The better choice depends on driver preference. A button sequence removes the need to carry another item, while automatic tag recognition can be more convenient for drivers who do not want to enter a code on every trip.

Compatibility and installation quality are important with any system connected to vehicle electronics. The device must suit the vehicle, and installation should avoid interfering with normal operation, servicing or electrical reliability.

5. Add a hidden GPS vehicle tracker

An immobiliser is designed to stop unauthorised driving, but it cannot provide the vehicle’s location. It may also offer limited protection if a car is physically towed or loaded onto another vehicle.

A GPS tracker adds location and movement information to the security setup. GPSBob vehicle trackers use GPS positioning and mobile connectivity to provide access through supported app and web interfaces. Depending on the model and configuration, useful functions may include current-location viewing, journey history and movement notifications.

A tracker should be installed discreetly, where it is unlikely to be spotted during a quick search. At the same time, it needs a suitable power connection and a position that allows reliable communication. Compact hard-wired trackers often use a simple power-and-earth connection, but correct installation remains essential.

Tracker buyers should also compare connectivity arrangements, the length of any included service period, renewal terms, alert functions and the procedure to follow after a theft. These details can be as important as the hardware itself.

6. Confirm the vehicle has actually locked

Electronic interference can prevent a remote-locking command from reaching the vehicle. A driver may hear or see an expected response from the key fob and walk away without noticing that the doors remain unlocked.

After pressing the lock button, check the vehicle itself. Watch for the mirrors folding or lights flashing if those features normally confirm locking, then test a door handle without holding the key too close to the car. Be aware that touching the handle of a passive-entry vehicle with the key nearby may unlock it again.

This simple check is especially worthwhile in busy car parks, at shopping centres and anywhere you notice unusual behaviour from the remote. Never assume a beep or button press alone proves that the vehicle is secure.

7. Choose your parking position carefully

Parking location can influence how much time, privacy and access a thief has. Where possible, use a locked garage or a well-lit area with regular pedestrian activity and clear visibility from surrounding buildings.

If security cameras are present, park within their likely field of view without blocking numberplates or other identifying details. At home, keep garage remotes and keys secure, close the garage door fully and avoid leaving tools nearby that could assist forced entry.

The vehicle’s orientation can also add friction. Parking close to a wall or solid obstacle may restrict access to a vulnerable door or make towing more difficult. Do not obstruct traffic, footpaths, emergency access or neighbouring properties in the process.

8. Remove valuables and identifying documents

Bags, laptops, phones, tools and portable navigation devices can encourage a break-in even when the thief has no initial intention of taking the vehicle. Remove valuable items rather than covering them with a jacket or blanket, which may suggest something is hidden underneath.

Do not leave keys, garage remotes or paperwork containing your home address in the car. Vehicle documents and service records can reveal personal information, while a garage remote may provide access to your property.

Check the centre console, door pockets, rear seat and cargo area before leaving. Tradespeople and drivers carrying equipment should consider lockable storage and avoid leaving branded cases visible through windows.

9. Build security in layers

No single product addresses every theft technique. A practical layered setup may include:

• A signal-blocking pouch or box for keyless-entry fobs
• A steering wheel lock that is visible from outside
• A concealed immobiliser requiring separate authentication
• A hidden GPS tracker for location and movement information
• Careful parking and a routine physical locking check

Each layer has a distinct job. Signal protection limits access to the key’s wireless communication. A steering lock creates a visible obstacle. An immobiliser can prevent unauthorised starting, while a tracker supports location monitoring if the vehicle is moved.

The aim is to increase the time, effort and uncertainty involved in stealing the car while retaining a way to establish its location if preventive measures are defeated.

Frequently asked questions

Is extra security worthwhile if I have comprehensive insurance?

Insurance and vehicle security perform different roles. Insurance may cover eligible financial loss under the terms of a policy, while security measures are intended to deter theft, delay access or help locate the vehicle. Always read the policy to understand its conditions, exclusions and security requirements.

Are factory alarms and immobilisers enough?

Factory systems remain valuable, but their capabilities vary between vehicles. Additional protection can address risks outside their design, including relay attacks, unauthorised electronic access and removal by towing. Layered security avoids relying entirely on one system.

Should I protect an older car without keyless entry?

Yes. Older vehicles can still be targeted for transport, resale or parts. A physical lock, suitable immobiliser and GPS tracker may all be useful even when relay theft is not relevant.

Can a dash cam improve security?

A dash cam with a properly configured parking mode may record movement or impacts while the vehicle is unattended. It can complement other measures, but it does not physically prevent entry or theft. Parking-mode recording also requires an appropriate power setup to protect the vehicle’s battery.

Conclusion

Effective car security is built from several modest but complementary measures. Protect key fobs, confirm the doors have locked, remove tempting items and park with visibility and access in mind. Add a visible physical lock for deterrence, an immobiliser for starting protection and a concealed GPS tracker for location capability.

The strongest setup is not necessarily the most complicated. It is the one suited to your vehicle, installed correctly and used consistently every time you park.