17: Chevrolet Monte Carlo Z34
Dubbed the “Lumina Coupe”, the 1990s version of the Monte Carlo was less than breathtaking. The first change for the car was a lack of a V8 engine choice. The second change was basically a Lumina coupe. Buyers responded with mixed emotions to the car. While sales were decent, it was nothing jaw-dropping. Reliability was a large problem with this generation of the Monte Carlo (via Repair Pal).
Interior quality also fell short on this generation of the GM sedan. The interior was panned for bland styling, and the over-cushioned seats were strange for a two-door coupe. Even in the Z34 trim, there was no denying what the Monte Carlo was. Many buyers were turned off and went for alternative models as a result.