The 2003 Lexus RX 300 is available as a 4-door, 5-seat sport utility. Starting at $35,125, the 2003 Lexus RX 300 FWD is powered by a 3.0L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 23-mpg on the highway. The top of the line 2003LexusRX 300AWD , priced at $ 36,925 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 22-mpg on the highway.