Tobot (변신자동차 또봇) is a South Korean 3D animated series about transforming cars, and it's pretty bad. Not as nauseating as China's Astro Plan, but ghastly enough to make SD Gundam Force actually watchable. It also appears to be sponsored and/or co-produced by Kia Motors, as the good guy robots consist of the Soul, the Sportage, the Forte/Cerato and the Morning/Picanto.
The toys look pretty cool, though.
Tobot YouTube Channel Tobot @ Cartoon Network South Korea