Two decades ago, Korean brands Hyundai and Kia were considered little more than compromise purchases for people who didn't have the cash or credit score to afford a car from Japan, Europe or the U.S. Today, according to vehicle quality tracker J.D. Power, Toyota and BMW and other stalwarts of quality and reputation are chasing Hyundai, Kia and Hyundai luxury brand Genesis for the fewest glitches and design flaws.