According to the original article [1] (The Drive one is just a poor rewrite), Hyundai is also affected.
>After the publishing of this story, numerous Hyundai and dealership employees contacted BleepingComputer to state that Hyundai was also affected by unexplained outages.
>In emails sent by Hyundai Motors America to Kia dealerships on Saturday and seen by BleepingComputer, Hyundai stated that multiple systems were down including their internal dealer site, hyundaidealer.com.
>After the publishing of this story, numerous Hyundai and dealership employees contacted BleepingComputer to state that Hyundai was also affected by unexplained outages.
>In emails sent by Hyundai Motors America to Kia dealerships on Saturday and seen by BleepingComputer, Hyundai stated that multiple systems were down including their internal dealer site, hyundaidealer.com.
[1] https://www.bleepingcomputer.com/news/security/kia-motors-am...