Hi ya.
Here is the HOW TO of changing the factory led, I make this mod because I realised that the civic led isn't so brighter.
First of all, you must find a led like this one (the resistance is for another mod)
01zd3.jpg
Now remove the cover case, using a screwdriver and pressing in one corner ( the photo is from 5 months ago, this is why appear the new led)
02st0.jpg
OK, now we need a drill to make a biggest hole, my led size is 5 mm so I make the hole a bit bigger.
Your hole must look like mine.
03we5.jpg
04xa8.jpg
Using the screwdriver, you remove the two screws.
05fh1.jpg
Now disconnect the cables, in my case are two, the white one is for the roof shutter
06gu4.jpg
Take off the square led and try to fit the new led, probably you must burn a bit of plastic to fit the new one, finally fill the space behind the new led with something, in my case I use orange silicone, because is much better for electricity issues.
Now connect the cables again and screws, it must look like this.
07ya7.jpg
This is the final look.
08vt1.jpg