Car theft is a serious issue, with hundreds of thousands of vehicles stolen each year across the globe.  

While many factors contribute to vehicle theft, a key deterrent is the humble car immobiliser. 

In this guide, we’ll explore the basics of immobiliser technology, from traditional systems to modern, sophisticated solutions – and why every driver should consider having one.

What is a car immobiliser?

A car immobiliser is an electronic security device fitted to a vehicle that prevents the engine from starting unless the correct key or fob is present. 

It works by disabling the engine’s electronic control unit (ECU), preventing fuel injection or ignition. This simple but effective technology has been a significant factor in reducing vehicle theft rates.

Also, the technology has been a legal requirement for all new cars sold since October 1998. 

Why should drivers consider an immobiliser?

Car thieves are becoming increasingly sophisticated, employing advanced techniques to bypass traditional security measures. 

Fortunately, an immobiliser adds an extra layer of protection, and the compelling reasons for drivers to consider installing an immobiliser, include:

• Theft deterrent: Immobilisers make it much harder for thieves to hotwire or bypass the ignition system, thereby reducing the risk of theft
• Insurance discounts: Many insurance companies offer discounts on premiums for vehicles equipped with immobilisers, as they are considered lower risk
• Peace of mind: Knowing that your vehicle has an added layer of security can provide peace of mind, especially for owners of high-value cars.

How do immobilisers work?

Since the basic principle behind immobilisers is to prevent the engine from starting without the correct key or fob, it’s important to appreciate that not all immobilisers are the same. There are two types to understand:

• Traditional immobilisers: These rely on physical keys and transponder chips. When you insert the key into the ignition, the chip communicates with the immobiliser’s receiver. If the code matches, the engine is allowed to start. While effective, traditional immobilisers are vulnerable to key cloning and relay theft.
• Modern immobilisers: Modern immobilisers, often integrated into keyless entry systems, offer a higher level of security. They use advanced encryption techniques to prevent unauthorised access. The key fob and the vehicle constantly communicate with each other, ensuring that only the correct key can start the engine. This makes it significantly more difficult for thieves to bypass the immobiliser.

Types of car immobilisers

There are several types of immobilisers installation available, each offering different levels of security:

• Factory-installed immobilisers: These are integrated into the vehicle by the manufacturer and will activate automatically when the key is removed from the ignition. They are generally very reliable and difficult to bypass
• Aftermarket immobilisers: These are installed after the vehicle has been purchased and can be customised to include additional features such as pin codes or smartphone integration. They are ideal for older cars that do not come with factory-installed immobilisers
• Advanced systems: These include biometric authentication, keyless entry or smartphone-controlled immobilisers. These systems offer superior security and convenience, making them a popular choice for high-end vehicle owners.

Other vehicle security options

In addition to immobilisers, there are other security measures that can further protect your vehicle:

• Alarm systems: These alert owners and deter thieves with sound and light when an unauthorised entry is detected
• GPS trackers: These devices allow you to track your car’s location in real-time, aiding in recovery if it is stolen
• Physical locks: Devices like wheel clamps, steering, and gear locks provide a physical deterrent to thieves.

Choosing the right immobiliser

When choosing an immobiliser, consider the age of your vehicle and its existing security features. 

It’s advisable to consult with a qualified mechanic or security expert to determine the best option for your specific needs. In the UK, the Ghost Immobiliser is the leading immobiliser and is becoming increasingly popular with people looking to protect their vehicles from modern theft tactics.

Maintaining your immobiliser

To ensure optimal performance, it’s essential to maintain your immobiliser.

Regular vehicle servicing is crucial, as it allows technicians to check the system’s functionality.

You should also avoid unauthorised modifications to your vehicle, as they can compromise the security system. 

Which is best: Traditional or modern immobiliser technologies?

Car immobilisers are an essential component of modern vehicle security, offering significant protection against theft. 

Whether you opt for a traditional or modern system, having an immobiliser can provide peace of mind and potentially lower your insurance costs. 

By understanding how these devices work and the benefits they offer, you can make an informed decision to enhance the security of your vehicle. 

Essentially, the best car immobiliser for your vehicle is the one that best meets your needs and budget.