This interactive D3.js world map visualizes BMW sales volumes across countries from 2010 to 2024, using choropleth coloring to distinguish high, medium, and low sales categories. Users can filter countries by sales volume through a dropdown and highlight markets with significant 7 Series sales via a checkbox, which outlines those countries in red. Hovering reveals a tooltip with sales details and top models. The visualization uses `d3.geoNaturalEarth1` projection, `d3.geoPath` for rendering map features from the world-atlas TopoJSON, and processes synthetic sales data distributed across representative countries per region.