Worst flop of the decade: Nissan Murano CrossCabriolet
1,078 (2012-present)

The Murano CrossCabriolet is basically a crossover SUV that Nissan ( NSANY) gave a cloth convertible top -- a move Takahashi says is not only odd but "doesn't make the Murano a particularly good car to drive.

"When you take the roof off of a car, you're killing a lot of its structural rigidity," he says. "You go over a bump and you can feel -- and see -- the CrossCabriolet's hood do something different from the tail."

Consumers don't seem much more enamored with the model than Takahashi is, as fewer than 1,100 bought CrossCabriolets during the model's first 11 months on the market.

"It's one of the worst-selling cars of all time," Takahashi says.

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