The Lexus RX 350 is a variant, introduced in 2006, of the second generation of the Lexus 300 (launched in 2003). The Lexus RX model line was first introduced in 1998 and is classified as a mid-size luxury crossover SUV. The Lexus RX 350 was redesigned several times in the Lexus RX third generation. The current, fourth generation, features the RX 450.