Might be this:
https://www.youtube.com/watch?v=F2gX-R1k7MM
However, scheme from KIA doesn't reveal any specific cap values:
https://imgur.com/a/bRyQNDu
About 11khz noise, I narrowed the problem down to my cluster. There's the noise only when the center screen backlight is on and max brightness. When lights on and brightness changes, the sound pitch changes or reduced. If I unplug the mid screen, the noise is gone.
First, I thought it was...