The Rio sedan and Rio5 hatchback were redesigned for the 2006 model year. For 2007, the SX trim level—formerly available only on the hatchback—is now available on the sedan as well. Both models offer new 14-, 15-, and 16-inch alloy wheel choices, as well as receiving some minor interior enhancements.

Although fuel-efficient subcompact cars have traditionally been used as a foothold by automakers entering the U.S. market, Kia was relatively late in introducing its own mini car. Though Kia did build the Festiva and Aspire for Ford, it wasn't until 2001—more than five years after the launch of the Sephia compact sedan and Sportage SUV—that Kia launched the pint-sized Rio.