How to prevent push-start car theft with an OBD lock

Thieves are now using OBD ports to steal cars

What is an OBD port?

Many modern cars have an OBD (on-board diagnostics) port, sometimes called an OBD-II or OBD2 port. This standardised socket, a 16-pin connector, allows access to the car's computer to monitor and diagnose vehicle health and performance.

Mechanics and technicians use diagnostic tools through the OBD port to read and clear error codes, which helps them troubleshoot vehicle issues. The OBT port can also be used for vehicle emissions testing to ensure compliance with environmental regulations. Drivers can even use smartphone applications to connect to the OBD port for advanced data monitoring and tracking.

How is the OBD port a theft risk?

Car thieves are taking advantage of increasingly available third-party electronic devices to plug into the OBD port. They can then bypass ignition locks and immobilisers, override the security system, reprogram a key fob or even start the engine without the original key - then drive the car off. This technique can generally be executed quickly and discreetly.

"Modern day cars are akin to computers on wheels and while this comes with plenty of benefits, it also creates opportunity for offenders," says Detective Inspector Julie MacDonald, Victoria Police Vehicle Crime Squad.

"The emergence of key programming devices are proving to be a technology facilitated problem. It was considered impossible to steal a car this way as little as two years ago. However, offenders are now using these devices like a modern-day screwdriver to steal cars."

How are thieves getting OBD port devices?

Numerous sites such as Amazon and eBay offer the devices for sale, since they are legal to own for mechanics and other related professions.

“On the frontline, it’s become clear these devices are well understood and frequently used by offenders," says Inspector Scott Dwyer, Victoria Police SD2 Investigations and Response. "They are showing up more and more at search warrants and offenders are admitting they are using them during arrest interviews."

Victoria Police states that car thefts using third party electronic devices have been occurring in other countries such as the United States and United Kingdom for several years, and are now becoming more prevalent locally.

The solution: OBD locks fitted over the port

How an OBD lock works

You can purchase an OBD port lock to help keep your car safe from theft. These locks fit over the OBD port to prevent offenders from connecting a reprogramming device to your vehicle. Once fitted, OBD locks require a specific key or code to unlock, ensuring that only the owner can remove the device.

Some OBD locks are simple, one-piece designs that fit directly over the OBD port, while others are more complex, featuring locking mechanisms that require a key or fob for access. Advanced models come with additional features, such as alarms or GPS tracking, providing an enhanced security solution.

How to install an OBD lock

In general, OBD port locks are easy to install yourself. OBD port locks are cheap and readily available from auto shops and vehicle anti-theft websites.

You will need an OBD lock kit, a screwdriver, and possibly a socket set, depending on your vehicle model. Follow this step-by-step guide to ensure a successful installation:

• Turn your vehicle off and remove any keys
• Locate the OBD port in your car, usually found under the dashboard near the driver's seat
• Gently remove any panels or coverings over the OBD port
• Secure the lock in place over the OBD port, following the instructions provided with your OBD lock kit
• Reattach any panels or coverings you removed earlier.

You can test the installation by attempting to connect to the OBD port with a diagnostic tool. The lock should prevent access, confirming that your installation was successful.

Why it's important to prevent car access

Would-be car thieves need to first get inside your car to use the OBD port.

"If you can keep thieves out of your car, then the chances of losing your car are far reduced," MacDonald says.

Always lock your vehicle and close all windows, even at home. Remove any tempting items like car keys, house keys, garage remotes and valuables. Make sure to park in a secure, well-lit area at all times. At home, park off the street in a driveway, carport, or ideally a locked garage. Consider installing sensor lights or CCTV to help deter thieves.

You can also install other anti-theft devices, such as car alarms, steering wheel locks, engine immobilisers and keyless digital blockers. Talk to staff at auto shops that stock anti-theft products for advice.

More: How to prevent car theft and protect your car

What to do if your car is stolen

If your car is stolen, immediately report the theft to police and call your insurance company. Read more on what to do if your car is stolen.

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