19: Hyundai XG350
When you think about Hyundai and luxury, the greatest Hyundai luxury car was the XG350. Between the awkward exterior design and poor powertrain options, this Hyundai confused buyers. The XG350 was marketed as a premium luxury car, but the end result didn’t quite add up to that (via Car and Driver).

The exterior appointments were all cheaply made, and there were used luxury car options that were a lot better. Hyundai would slowly refine the XG350 as time went on, but it wasn’t enough to persuade buyers. The fact that it had a Hyundai badge meant it wasn’t going to make it in the luxury car segment.