11: Ford Taurus SHO (Third Generation)
If the design of the ordinary Taurus model wasn’t bad enough during this period, Ford tried to make it worse by sending the newly-revised Taurus SHO to the market. The SHO was the performance version of the Taurus and managed to gain a cult like following in the first two generations of the car. Unfortunately, there were a few issues with this car and the first issue wasn’t just related to its exterior styling (via The Motor Digest).
The powerplant was one of the worst engines Ford ever put into a car. It was a Yamaha-powered V8 engine and suffered from some of the worst reliability issues that the Taurus brand has ever had. This engine was a pain to repair and most of the issues happened with the timing chain while the cars were still under warranty. Needless to say, this generation of the Taurus SHO ended up costing the company a pretty penny.