4: Toyota Echo
When the Toyota Tercel was discontinued, there was a void left in the lineup for a compact car. Toyota reintroduced a new compact car into the lineup, and that was the Echo. The Echo was a small car that didn’t offer much refinement but initially offered a lot in the compact car segment (via Auto Evolution).
Unfortunately, the Echo never sold well, and the consumers flocked to other automakers. There were just better options that were on the market than the Echo. This was one of Toyota’s most embarrassing projects.