This interactive D3.js visualization presents BMW sales data as a horizontal stacked bar chart, comparing Manual and Automatic transmission sales volumes across eleven vehicle models. The bars are ordered by total sales, with purple and pink segments encoding transmission types, and hover interactions reveal detailed information for each segment. Built with D3.js v7, it uses the `d3.rollups` API to aggregate the CSV dataset, employs SVG rendering with animation filters and drop shadows, and includes a tooltip system that dynamically positions itself based on pointer coordinates.