Just to be sure. White highlighted definitely need to remove. Orange also? That is what you call air filter box? I thought only white is called air filter box.
So only red part is called throttle body? I thought orange is part of throttle body.
I tried to remove to nut on the right side of the white highlighted, but it's screwed too hard. I use the normal long nut driver to reach. I think maybe need the torque nut driver instead to apply better power.
My car now is 113k km. Previously got once gear seems to have problem. Switiching gear seems a bit hard. I'm 5 minutes always from home in a rainy days. Next morning it was fine. Bring to workshop, workshop can't figure out since not happening. Changed atf every 20k km. So better change filter too I think.
But even without this incident better change too. I learned alot from you and other forummers on maintenance, beyond atf and engine oil change.
Did my throttle body cleaning, changed serpentine belt, changed brake fluid.
Actually if you can't remove it, maybe you can send and get a mechanic to do it for you. Observe how he do it and you can replace it yourself next time.