Kia spent two decades transforming the Optima midsize sedan from a joke into a genuinely desirable car — all so it could rebrand and start anew.

The 2021 Kia K5 is the replacement for the Kia Optima. While the name is a sterile alphanumeric combination that car buyers are more likely to associated with a Chevy SUV than anything wearing the Kia badge, the K5 looks pretty good on paper. The last Optima was a good-looking car, but Kia dialed things up even further this time, while adding a bigger touchscreen, more driver-assist tech, optional all-wheel drive, and a sporty GT model.
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