I was able to locate the beepers on my 2018 Honda Pilot using this post, thanks. The outside beeper is behind the bumper skin directly under the center latch. I was able to pull the bumper out just enough to wedge two 2X4's in to keep a gap to work on the beeper. I used liquid electrical tape and once I removed the beeper I coated the connector with the LET. Once you undo the 5MM Allen bolt ( I took the tail light out too) the bumper will just pull out of the clips along the top. Removing that allen bolt will give you enough leeway to be able to pull the bumper out of the clips. I also pulled the gasket to make it easier to put the bumper back on. Aligning the clips of the bumper would be hard without removing the gasket. Just pull the gasket away from the car and it pushes right back on after all done. Same for the bumper, just pull it away from the back of the car. The photo of the interior beeper is correct with that box. I used some "Goop" brand glue and squirted some in the opening of the beeper inside the car. Taped over the hole so it didn't leak out while drying and VIOLA! No more incessant beeping from this car. I swear, the beeping with the seatbelt combined with the door lock beeping, and the walking away beeping made me want to sell this car. Thankfully I was able to stop most of it. I saved the beeper incase I ever sell the car, but I am glad to have a quiet car now. No more waking folks up if we go camping or the wife when I am home and open the gate early in the morning.
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Remove that 5MM allen bolt
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Beeper is under the center, just below the latch of the tailgate. It is the black square thing attached to the wiring. You can see the hole in the beeper for the super loud beeping sound to escape out of...
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That is the mounting hole where the beeper was attached.
