1: Jaguar X-Type
When Ford purchased Jaguar in the 1990s, there was a lot of speculation as to what the company would do with the historic luxury brand. One of the first vehicles released under the new Ford leadership was the X-Type. Although this compact sedan was a great car when it was new, its reliability was one of the worst ever reported (via Hot Cars).
Ford spent millions on the design and advertising of the sedan but it never gained the type of sales numbers that the company had hoped for. The X-Type is one of the notoriously worst used luxury cars that you can buy because of the lackluster reliability. The X-Type is one of the most notable blunders that came out of Ford during this era.