comments:
Worked for me/2025 Model Hitch Receiver: Curt 13420 mounts easily to existing holes. eTrailers has a nice installation video (https://www.youtube.com/watch?v=LZqabv1V4R0). Receiver tube appears to come out about 2" lower than the factory receiver. Requires cutting a hole in the center bumper trim piece but the hole is not visible unless you kneel and look under the car. Harness: s9f67-ac702 (7 wires, no cutting or splicing; plugs right into the car connectors. Includes pigtail that connects the harness end under the dash to a brake controller. I don't have a controller so have not tested this.) 14 page (!) installation instructions; I let the dealer do the installation for $72 quoted. Beware Kia part numbers; they seem to change a lot. Curt 58000 bracket to hold the 7 wire socket. Curt 45295 ball mount and 2" ball. Reversed the ball so the mount becomes a lift instead of a drop There are tons of testers and adapters; here are the two that I bought. CURT 58270 7-wire circuit Hopkins 7 Blade to 4 Wire Flat Vehicle To Trailer Connector Adapter (https://www.amazon.com/dp/B0002RNSKK)
FWIW, I couldn’t get that one to work, but I got this and it worked well https://a.co/d/08BJTKvv. (Just giving OP other options in case they end up in a similar situation)