I haven’t really had time to fix it or observe to well but my low beam and high beam went out on my driver side of my car along with my side marker. I firstly checked the connection and harnesses of the side marker as well as the headlight and re clipped it. Upon starting the car the side marker was working as well as the led line on my spec d headlights once again but my low beam/high beam remain off. I bought light bulbs to test it this weekend and to my surprise i noticed the side marker is out again, it could’ve been knocked loose again but I still plan on replacing the bulbs to see if it’s truly just the bulbs but I have a feeling it’s not and it’s more. As far as I saw from research is that my models headlight fuse is connected so all the lights would be off if it were the case but i’m not sure how accurate that is. But basically does anyone have any similar issue or insight on what most likely is the issue?
My G has 83k miles as well so keep that in mind!!

 

I believe your left and right high and low beams do have their own fuses. Check #74 and #86 in the IPDM which power the driver's side to be sure they're good. But since you say your side marker light is also involved I wonder if you've somehow lost the ground on that side.
Here are the Factory Service Manuals that could help you trace things, if you are patient...
https://www.nicoclub.com/service-man...F2005%2Flt.pdf
https://www.nicoclub.com/service-man...F2005%2Fpg.pdf
Below the "viewing window" you can "click here to download a copy" of these pdfs.

 

74 and 86 are inside the cabin correct?

 

No, they're in the IPDM behind the battery. Not exactly convenient...

 

Sorry, I linked you to the sedan Service Manuals above and just realized you're in a coupe. Same fuses (!!) but here are the correct books:
https://www.nicoclub.com/service-man...F2005%2Flt.pdf
https://www.nicoclub.com/service-man...F2005%2Fpg.pdf