In a first generation (2005 to 2009) Kia Sorento, the OBD port will be located underneath the steering wheel and above the gas pedal. In a second generation (2010 to present) Sorento, you’ll find it under a plastic cover, just beneath the fuel door and rear hatch controls to the left of the steering wheel.
The OBD port looks like something that could plug into an old-school desktop computer. It’s rectangular with sixteen small rectangular port holes, eight on top and eight on the bottom. In an older Sorento, you’ll need to get down on the driver’s side floor with a flashlight to see it well.