LexusPartsNow.com offers the wholesale prices for genuine 2015 Lexus GS450h parts. Parts like Tire Pressure Warning System 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.