Hyundai Motor Group is investing in Aurora, a developer of self-driving technology for autos, with a plan to bring the systems to Hyundai and Kia models.

The companies have been working for the past year to develop and integrate the "Aurora Driver" into Hyundai's NEXO fuel cell vehicles as well as on other projects.

It's an extension of an existing partnership and furthers the work that large auto manufacturers are doing with developers of driverless technology. General Motors acquired Cruise in 2016, and Ford took a stake in Argo.ai the following year. Aurora still aims to provide autonomous systems to many different players.

On Monday, Aurora announced a partnership with Fiat Chrysler to develop self-driving vehicles for corporate clients. It also works with Chinese electric vehicle maker Byton.