Based on the article it appears this recall is for their gas cars. Something with the starter…

The vulnerability, carrying a severity rating of 10 out of a possible 10, resides in the AMI MegaRAC, a widely used firmware package that allows large fleets of servers to be remotely accessed and managed even when power is unavailable or the operating system isn’t functioning. These motherboard-attached microcontrollers, known as baseboard management controllers (BMCs), give extraordinary control over servers inside data centers.