What is Keyless Entry in a Car? Security Risks and Solutions

The introduction of a keyless entry car in the mid 80’s revolutionised the way we access our cars. Thanks to this clever system, we can unlock our car doors without wrestling with the key. But with all new tech, there’s a flip side—security risks.

In this blog, we break down what is keyless entry car, how it works, and the potential risks involved. We also cover which manufacturers give us keyless entry cars and how to keep your car secure from theft and risk.

What is Keyless Entry in a Car?

So, what is keyless entry on a car? It’s a system that lets you unlock, lock, and even start your car without physically using a key. Instead, a small electronic device, known as a key fob, communicates with your car’s computer system.

It’s like having your own set of electronic car keys, and is designed for maximum convenience and minimum effort on your part. As long as the key fob is within a certain range, the car doors will unlock and the engine will start at the push of a button.

As for the benefits of keyless entry on a car, it is especially handy when you’re carrying bags or approaching your car in a dimly lit area.

How Does Keyless Entry Work?

If you’re wondering how keyless entry in a car works, let’s dive into the nuts and bolts.

1. Key Fob and Signal Transmission: Your key fob constantly emits a low-frequency radio signal with a unique code. When you’re near your car, the sensors pick up this signal.
2. Communication with the Car’s System: The car’s onboard computer is always on the lookout for its fob’s unique signal. When it detects this signal, it sends one back, creating a two-way communication.
3. Unlocking and Starting the Car: If the signal from the key fob is correct, the car unlocks the doors or starts the engine, depending on which button is pressed. For cars with push-button start, the engine only fires up if the fob is inside the vehicle.

This system uses encrypted radio signals that are tough to crack. However, tech-savvy criminals have found ways around this.

Popular Cars with Keyless Entry

Curious about which cars have keyless entry? Here are some popular models:

• Toyota RAV4 and Lexus RX450H: Known for reliable comfort and rugged luxury, these Toyotas come with a smart key, or fob system for keyless entry and push-button start.
• Ford Transit: This capable, dependable van features keyless entry and a convenient keypad system on the driver’s door.
• BMW 3 Series: This luxury sedan offers the Comfort Access system, which includes keyless entry and ignition.
• Mercedes-Benz C-Class: This premium car boasts a sophisticated keyless entry system, adding to its tech-forward appeal.

Security Risks with Keyless Entry: Relay Theft

With every new tech, there’s a downside. For keyless entry systems, it’s relay theft. But what is relay theft, and how does it threaten your car?

Relay theft is a method used by criminals to capture the signal from your key fob and relay it to your car. This is how it tricks it into unlocking or starting your car without a key. Here’s how it works.

1. Signal Interception: Thieves use a device to capture the signal from your key fob, even if it’s inside your home.
2. Signal Amplification: This signal is then boosted and sent to another device near your car, making your car’s system think the key fob is nearby.
3. Unauthorised Access: Once the car is tricked into believing the key is close, thieves can easily unlock the car and drive away.

Relay theft can happen quickly and without any obvious signs of forced entry. This makes it a popular choice among thieves. They understand what keyless entry on a car is and leverage its vulnerabilities.

How to Protect Your Keyless Entry Car

So, you have a keyless entry car, and you’re worried about relay theft. Understandable. Here are some effective ways to protect your keyless entry car.

Store Keys in a Signal-Blocking Pouch

A signal-blocking pouch (Faraday bag) is designed to block radio signals. If you store your key fob in one of these pouches, it prevents thieves from picking up its signal and relaying it to your car. This is an inexpensive and simple solution to a complex problem.

Fit an Aftermarket Alarm

Adding aftermarket car alarms to your car gives you an extra layer of security. These alarms often include features like motion sensors and remote alerts that can help deter would-be thieves. Some advanced systems even offer GPS tracking to help locate your car if it’s stolen.

Install an Immobiliser

An immobiliser prevents the car engine from starting without the correct key or fob. Many modern cars already come with immobilisers, but if yours doesn’t, consider getting one installed, such as the Ghost II Immobiliser. It’s a powerful deterrent against theft.

Use a Dash Cam

A dash cam can also help protect your car. Many dash cams come with motion detection and parking mode features that can capture footage of any suspicious activity around your vehicle. This can be a significant deterrent to criminals and provide valuable evidence if your car is targeted.

Turn Off Keyless Entry

Some cars allow you to turn off keyless entry when it’s not needed. Check your car’s manual or ask your dealership if this is an option. Turning off keyless entry when your car is parked in a secure location can reduce the risk of relay theft.

FAQs

How do I know if my car has keyless entry?

To check if your car has keyless entry, start by looking at your key fob. If it has buttons to lock or unlock without using a key, your car likely has this feature. Vehicles with a push-button start system generally support keyless entry. For confirmation, you can also consult your car’s manual or contact your dealership.

Can keyless cars be stolen without the key?

Yes, keyless cars can be stolen without the key using relay theft. Thieves can capture and relay the signal from a key fob, which allows them to unlock and start your car without the actual key fob.

What is the difference between keyless entry and remote entry?

Keyless entry allows you to unlock and start your car without physically pressing any buttons on the fob, as long as the fob is nearby. Remote entry, on the other hand, requires pressing a button on the key fob to unlock the car. Remotes also don’t allow you to start the car unless you insert the key into the ignition or press a button inside.

Can you turn off keyless entry?

Yes, many vehicles offer the option to turn off keyless entry. This can usually be done through the car’s settings or by consulting your dealership. Disabling keyless entry, especially when parked in vulnerable areas, can help reduce the risk of relay theft.