The Honda Insight was a hybrid electric vehicle manufactured and marketed by Honda in its first generation as a three-door, two passenger hatchback (1999–2006) and in its second generation as a five-door, five passenger hatchback (2009–2014). The Insight was the first production vehicle to feature Honda's Integrated Motor Assist system. The first generation Insight is the most fuel efficient gasoline-powered car available in the U.S. without plug-in capability for the length of its production run. EPA estimates were 61 City/70 Highway/65 Combined. However, that was under the old EPA standards. Today's EPA standards reduced the estimates to 49 City/61 Highway/53 Combined. In December 2015, Toyota beat the Insight in City and Combined mileage by the new EPA estimate with the 2016 Toyota Prius Eco with EPA ratings of 58 City/53 Highway/56 Combined.
Honda introduced the second-generation Insight in Japan in February 2009 and in the United States on March 24, 2009. The Insight was the least expensive hybrid available in the US. In December 2010, Honda introduced a less expensive base model for the 2011 model year. The Insight was launched April 2009 in the UK as the lowest priced hybrid on the market and became the best selling hybrid for the month.
The Insight ranked as the top-selling vehicle in Japan for the month of April 2009, a first for a hybrid model. During its first twelve months after first available in the Japanese market, the second-generation Insight sold 143,015 units around the world. In July 2014 Honda announced the end of production of the Insight for the 2015 model, together with the Honda FCX Clarity hydrogen fuel-cell car and the Honda Fit EV electric car.