Infiniti is the luxury vehicle division of Japanese automaker Nissan Motor Company. Infiniti officially started selling vehicles on November 8, 1989 in North America. The marketing network for Infiniti-branded vehicles now includes over 230 dealers in over 15 countries.On 17 December 2012, Infiniti announced a new product nomenclature scheme where all sedans and coupes will carry a "Q" prefix while all crossovers and SUVs will carry a QX prefix. Instead of numbers indicating engine displacement after the prefix, the two digits will be used to indicate where in the brands hierarchy the model falls. The first model to follow this scheme will be the upcoming Q50, which replaces the G sedan.