The Kia Optima is a mid-size four-door sedan manufactured by Kia Motors since 2000 and marketed globally through various nameplates. First generation cars were mostly marketed as the Optima, although the Kia Magentis name was used in Europe and Canada when sales began there in 2002. For the second generation models, Kia used the Kia Lotze & Kia K5 name for the South Korean market, and the Magentis name globally, except in the United States and Malaysia where the Optima name was retained. The Optima name is now going to be used for all markets except China, where they will use the South Korean market name. From 2000-2005 Optimas were a rebadged variant of the Hyundai Sonata, differing only from the Sonata in minor exterior styling details and equipment content. In Australia, the Optima was introduced in May 2001, offered only with a 2.5L V6 engine, and choice of manual or automatic transmission.