A PZEV is not a hybrid. A PZEV (Partial Zero Emissions Vehicle) is a gasoline-powered vehicle that emits almost no pollutants. The emission standards for a PZEV are much stricter than those for a regular gasoline-powered car. In order to meet these emissions standards, manufacturers have to make some changes to the engine and exhaust system. These changes result in better fuel economy and lower emissions, but they also add to the cost of the vehicle.