11: Chrysler Concorde
For much of the 1990s and early 2000s, the Chrysler brand had three distinct sedans for sale. The Concorde, LHS, and 300M. All three of these sedans shared the LH Platform with the Dodge Intrepid. Consumers were privy to this fact because all three cars looked exactly alike. The Concorde suffered from many reliability issues during its run (via Motor Trend).
Transmission failure was the norm in the Chrysler LH sedans, and that was just the tip of the iceberg. The 2.7L V6 engine is widely considered one of the worst engines Chrysler ever made. Due to a faulty oil level design, the engine would sludge and suffer from catastrophic failure. There were many class-action lawsuits filed against Chrysler because of the horrible engine design.