9: Isuzu Impulse
The Impulse is another skeleton of early 1990s GM products. GM designed the car in partnership with Isuzu. The more widely known version of the Impulse was the Geo Storm, which sold 3-to-1 compared to the Impulse. The Impulse had an optional turbocharger but reliability was lacking at best (via The Drive).
The build quality on the Impulse was also questionable. Consumers often had to spend more time in the shop than on the road. The design of the Impulse was attractive but the build quality was questionable. Isuzu managed to sell only a small amount of these cars before the line was discontinued altogether.