LexusPartsNow.com offers the wholesale prices for genuine 2016 Lexus IS300 parts. Parts like Floor Side Member are shipped directly from authorized Lexus dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.0L, 6 Cyl 2.5L, 6 Cyl 3.5L. Trim: LUX.