Lexus RX 2004-09 :: How To Reduce Beep Volume When Opening Rear Hatch

I was busy playing with my license plate lights over the weekend and came across how to reduce the beep volume when opening the rear hatch when using the remote or indash power door button. I'm not sure if this has been discovered before but thought I would post in case no one knows about it.

I have done this mod on my car and I haven't had any adverse effects and everything works perfectlyfine (no new lights, errors or anything else). It doesn't get rid of the noise, but it does reduce it down to the same volume as when you unlock/lock your car. Open your rear power door

Carefully pry away the bottom section of the interior panel of the rear door (this will be the side furthest away from the rear window glass). The trim is held in place by plastic clips that will pop out. A gentle but firm tug will remove the first one and the rest will just follow as you work your way around.

Once this is open look on the end side of the door. You will notice a black box with one end being rounded. There will be a plug that fits into this. Remove the plug and stow away. I stowed mine back behind the part of the loom it extends from to keep it out the way

Put the trim back and enjoy that annoying beep now being a lot quieter. The rest of the beep is at the front of the car and looks to hide somewhere underneath the shroud of the wiper blades where the front struts sit. It looks to be from the same area as the speaker for the alarm, so probably won't be able to completely kill the noise.