Honda joined the IndyCar Series in 2003, competing against Chevrolet and Toyota. Honda won the manufacturers' championship in 2004 and 2005, and the drivers' championship was won by Honda-powered drivers in 2004 and 2005. Honda also won the Indianapolis 500 in 2004 and 2005. Between 2003 and 2005, Honda scored 28 wins from 49 races.