LexusPartsNow.com offers the wholesale prices for genuine 2021 Lexus IS300 parts. Parts like Wireless Door Lock 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 3.5L, 8 Cyl 5.0L. Trim: LUX.