U.S. Department of Energy - Energy Efficiency and Renewable Energy
Vehicle Technologies Office – Advanced Vehicle Testing Activity
2004 Toyota Prius Hybrid Electric Vehicle Accelerated Reliability Testing – October 2007
Two model year 2004 Toyota Prius hybrid electric vehicles (HEVs) entered accelerated reliability testing in one fleet in Arizona during November 2003. After reaching 160,000 miles each, the two Prius HEVs will have their batteries tested before being retired.
Fact sheets and maintenance logs for these vehicles give detailed information such as miles driven, fuel economy, operations and maintenance requirements, operating costs, and life-cycle costs.
The two (Model Year 2004) Prius HEVs have been driven a total of 320,000 miles and the cumulative average fuel economy for the Prius HEVs is 44.2 miles per gallon.