had to sign up to reply to this one. my 2020 GT1 has been at the dealership for warranty repair due to coolant leak since middle of september.
for a few days I was noticing that the radiator fan was running at high speed after any amount of driving for a few minutes. thought it was odd, but not urgent because I didn't see any evidence of leaked fluids, reservoir looked fine, etc. friday evening it was running the fan in the garage while we ate dinner and we heard a bang. went out there, looked around, nothing seemed obviously wrong. wasn't even sure it came from the car, something could've fallen over, but decided I'd take it to the dealership monday.
saturday I checked coolant before leaving for breakfast, things seemed fine. probably 10-15 minutes into the trip got the engine overheat warning. pulled over and shut down, opened hood, no coolant. got towed to dealership by roadside assist, last time I saw the car. never actually got a low coolant warning, or any other warning light prior to the engine overheat, which seemed odd to me.
dealership, when they've bothered to talk to me at all, has told me that they found the leak on the back side of the lower half intake manifold. said they ordered the part, told me parts had arrived week before thanksgiving. then next time I called told me that they got the wrong part, and ordered it again. no new news since then. I've started hassling kia corporate instead because this is beyond ridiculous now. feel like they're going to force me to lemon law the thing before it's all said and done.
the bang we heard with the car off for several minutes still has me baffled. something gave way under vacuum? maybe after plastic got too hot? hell if I know.
anyway fun car while it worked, but the dealership/warranty/support experience sucks a lot. no loaner, no money or arrangements for a rental, been out a car for over 3 months now with no end in sight.