Just installed the OEM fog lights on my 2017 RDX, not a hard install. It's weird that the lights are blue, but they still look good. I chose to go this route after being disappointed with the quality of the morimoto fog lights.
The easiest way to do the install was to first remove the 4 clips underneath the bumper right under the fog lights, a screw and clip in the wheel well, for each side of the vehicle.
Here are the stock lights vs. the LEDs installed.
Left side wasn't to bad but the right can be a little tricky, the windshield wash reservoir gets in the way of one of the screws. To get around it I used a small ratchet with a Philips head bit.
That part number (08V31-TX6-2A0) is for only the two fog lights. It does not include the wiring, plastic housing, nor the replacement control switch arm.
That all being said, yes I only needed the two fog lights, I have the advanced trim which came with halogen fog lights. Wish the lights were cheaper, but it beats paying 800 or 600 for the whole kit.
Link below. 08V31-TX6-2A0 | Acura LED Fog Lights (RDX) - Bernardi Parts
Thanks for posting the install. It's a big help. I'm puzzled why Acura doesn't provide the LED lights in the Advance. Mine has halogens in it, which don't match the color of any of the other lighting at all.