Kia and Hyundai's Theta engines have been around for a while, but they're not without problems. Here are some of the most ...
A 2.0-liter Theta II engine in a Kia Sportage - P199/Wikimedia Commons The launch of Hyundai's first Theta engine in the 2004 Sonata helped signify that the Korean automaker was moving beyond its 20th ...