15: Lincoln Mark VIII
There was a time when personal luxury coupes occupied one of the most popular segments of the automotive industry. The final generation of the Mark VIII was a mere shadow of what the model was once symbolic of being. A cheap design with flimsy interior materials was only part of the problem with the Mark VIII (via Car Gurus).

The DOHC V8 engine was also uncertain as was the air ride suspension. These cars were notorious for head gasket failure and transmission failures. The Lincoln lineup of cars was already lacking around this period and the Mark VIII was discontinued in 1998. There are very few of these models still on the market these days.