Walk into any car dealership right now, and you'll notice something weird. The lots are PACKED. I'm talking rows and rows of brand new 2026 models just sitting there, collecting dust. And it's not just a supply chain thing anymore—these cars literally have no buyers. Today we're counting down the 12 slowest-selling cars in America based on Market Day Supply data from CarEdge. This is basically how long it takes to sell through current inventory, and these numbers are absolutely insane. How we compiled this list: We ranked vehicles by current market day supply (MDS)—the number of days it would take to sell all inventory at the current sales rate. Models with comparatively lower inventory levels were excluded to focus on the vehicles creating the biggest headaches for dealers.