A Hyundai booth displays the company logo at the North American International Auto Show in Detroit
A Hyundai booth displays the company logo at the North American International Auto Show in Detroit, Michigan, U.S. January 16, 2018. Reuters

A group of 22 U.S. state attorneys general on Monday urged Hyundai Motor and Kia Corp to do more to address millions of U.S. vehicles that are prone to theft.

Last month, the Korean automakers said they would offer software upgrades to 8.3 million U.S. vehicles to help curb increasing car thefts using a method popularized on TikTok and other social media channels.

The states and the District of Columbia led by Wisconsin Attorney General Joshua Kaul said the automakers had failed to take adequate steps to address the alarming rate of theft and urged them to accelerate the implementation of the software upgrade and provide free alternative protective measures for owners whose cars cannot support the software upgrade.

Hyundai and Kia did not immediately provide a response to a request for comment.

"The surge in thefts of these vulnerable vehicles has been truly shocking," said the letter. "More needs to be done so that every current owner can obtain one of these devices at no cost as soon as possible - especially those owners whose cars are not compatible with the software upgrade you recently announced." In Chicago there were over 7,000 thefts of Hyundai and Kia vehicles in 2022 accounting for 10% of Kia and 7% of Hyundai vehicles registered in the city, the letter said.

Earlier this month, Minnesota Attorney General Keith Ellison said he had launched a civil investigation into Kia and Hyundai's sale of vehicles to Minnesota consumers that lacked industry-standard, anti-theft technology and sought documents and answer questions under oath.

Ellison said in Minneapolis in 2022 Kia and Hyundai vehicle thefts were tied to five homicides and 265 motor vehicle accidents.

TikTok videos showing how to steal cars without push-button ignitions and immobilizing anti-theft devices has spread nationwide. This had led to at least 14 reported crashes and eight fatalities, the National Highway Traffic Safety Administration (NHTSA) said in February.

The free upgrade will be offered for 3.8 million Hyundai and 4.5 million Kia vehicles, the automakers and NHTSA said. Hyundai said the upgrade applies to various U.S. 2011 through 2022 model year vehicles.

Many Hyundai and Kia vehicles have no electronic immobilizers, which prevent break-ins and bypassing the ignition. The feature is standard on nearly all vehicles made by other manufacturers since 2015.

Hyundai will also provide customers with a window sticker alerting would-be thieves that the vehicle is equipped with anti-theft protection.

All Hyundai vehicles produced since November 2021 are equipped with an engine immobilizer as standard equipment.

The logo of Kia Corp is seen on its electric vehicle EV6 during a photo opportunity in Seoul
The logo of Kia Corp is seen on its electric vehicle EV6 during a photo opportunity in Seoul, South Korea, June 1, 2021. Picture taken on June 1, 2021. Reuters