4. 1996 Ford Taurus
The 1996 Ford Taurus underwent a dramatic facelift, featuring oval-shaped everything—from grilles to windows and even the dashboard. This bold design leap polarized buyers, with many finding the look awkward and unattractive. Sales dropped sharply after the update, turning the once-dominant Taurus into a cautionary tale for automakers. Critics and consumers alike pointed to the redesign as a misstep that cost Ford its midsize sedan crown.