The company lifted its earnings targets for the year, adding that sales outside of Western Europe were proving to be one of the main drivers of growth.
Europe's fourth-biggest producer of cars said first-half net income jumped 29% to €1.5bn (£990m).
Its full-year target for profit margins will climb to 5.5% as a result.
Renault's operating profit more than doubled to €1.3bn (£86m) in the first half of 2004, while sales added 11% to €20.8bn (£13.8bn).
The company is forecasting that demand in western Europe will rise by as much as 2% this year.