The Lexus RX is a crossover sport utility vehicle (SUV) sold since 1998 by Lexus, the luxury division of Toyota. Three generations of the Lexus RX have been produced to date, the first being compact in size, and the latter two classified as mid-size. Both front- and four-wheel drive configurations have been used on the RX series, and several gasoline powertrain options, including V6 engines and hybrid systems, have been offered. Prior to the third generation model, Japanese sales occurred under the name Toyota Harrier as Lexus had yet to be launched in Japan. In the Lexus model lineup, the RX sits below the larger GX and LX body-on-frame SUVs, and remains the marque's only crossover model. The RX name stands for Radiant Crossover.It has also been labelled as "Recreation Cross Country" in some markets.