18: 1978-1983 Ford Fairmont
Ford buyers were notoriously picky when this car hit the market. The days of being able to market a gas-guzzling vehicle were a thing of the past, and consumers wanted something that offered something different. Thus, the 1978-1983 Ford Fairmont was designed to be a reliable and easy-to-drive family car. The problem was that the design of the Fairmont was questionable at best, and this caused many consumers to change their minds about the car (via Motor Biscuit).
Sales of the Fairmont were abysmal at best, and the car was discontinued shortly thereafter. The Fairmont could have been a hit for Ford had the car been designed a bit better. Unfortunately, though, the design was lacking in many critical areas, and this made the Fairmont a seemingly failed proposition for the company. The Chrysler K-Cars were on the horizon, and the passenger car market was going to change in more ways than one.