The Lexus GS 450h is a model of automobile assembled by Toyota Motor Corp. under the Lexus brand name. It is the first mass-production rear-wheel drive hybrid vehicle in the world. Its powertrain includes a 3.5 liter V6 engine and an electric motor. Toyota has planned to unveil the GS 450h at the 2005 New York International Auto Show. The GS 450h is a Super Ultra Low Emissions vehicle.