Hyundai is offering owners of older models an end around their ineligibility for a theft-prevention software update.

The South Korean carmaker, many of whose 2011 to 2022 models are prone to theft, is offering owners an ignition cylinder protector if their models don’t qualify for an antitheft software upgrade.

The device, which includes a locking bracket, is designed to protect models without push-button ignitions and immobilizing technology. Hyundai says owners of about 646,000 models that aren't eligible for the software update can receive it, it, along with window decals indicating the vehicle has the device installed.

The carmaker said it would start notifying owners of the offering this week.

The models in question have been the target of thieves across the country who can relatively easily drive off with them. A rash of the thefts took off after some thieves posted how-to videos on social media platforms instructing others to follow suit. Some Kia models have also been targeted.

Hundreds of insurers and many U.S. cities have sued the carmakers, while some states have sought the models’ recall. The carmakers have rolled out software updates and distributed steering wheel locks in an effort to remedy the problem.

Hyundai says an engineering consultant has verified the ignition device's effectivness. It says the protector prevents the ignition cylinder's removal.

Hyundai is Kia’s parent company. Kia has so far not announced a similar ignition cylinder protector offering for its models.

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