We have this "feature" on our ORP. Went through the same frustrations as you trying to get this to work reliably. I have better things to do than tap-dance near the rear bumper hoping the hatch might decide to open while losing my balance and dumping my groceries.
I disabled said "feature"...
2) Fake engine noise ESE sent via audio system can be disabled.
https://www.4runner6g.com/forum/threads/exhaust-note-changes-in-sport-mode.5424/
3) Those covers are more like plastic debris shields.
Forum searches are like trying to lick your nose with your tongue... seldom retrieves anything useful.
Some more...
https://www.4runner6g.com/forum/threads/removed-second-row-seats.4027/#post-51579...
Never heard my hood prop rattle. But after installing hood struts, I also noticed the prop end was not snug in the holder. I firmed it up by wedging the end of a plastic tie wrap into the gap.
Toyo OC AT3 LT275/70R18
E-Rated 33.2" at 36 PSI.
I found that by just fully cranking the tire up, it will not fully seat up against the top horizontal of the forward brackets. It feels secure, but is not fully seated.
Near the top of travel, I need to twist & wiggle the tire with each small...
Install procedure (attached below) states to discard the original undercover fasteners.
They are slightly different than those in the Front Skid Plate Hardware kit.