I noticed there isn't any guides out there for fitting these kits to an a3 8l and questions about fitting them keep popping up, so as i fitted mine today i thought i would do a quick guide.
All you will need is a drill , drill bit and some insulation tape
Here is the kit i bought....
Its just a basic 6k 35w H1 kit with no mention of canbus....etc:
You will first need to remove the covers from the back of the headlight:
You do this by pushing down the tabs (circled):
Once you've got the cover off you'll need to drill a hole to pass the wires through.
some people make a cut in the bottom of the covers to allow the wires to pass in to the headlight i i wanted to make sure there was some sort of seal round the wires, but its up to you.
I cleaned the holes up after with a bit of sand paper (not shown in the pics)
Now pass the wires and part of the seal through the hole :
Back to the car...
Pull the brown and the yellow wire from the back of the headlight , unhook the wire bulb holder and withdraw the bulb you are about to replace:
Now replace the bulb with your new hid one:
You now need to connect up the wires from the hid kit to your factory wires:
Yellow goes to red and brown goes to black.
I did find that i had to squash the factory terminals with pliers as it was a bit of a loose fit.
And insulate the wires (i only did one in this pic):
Now replace the cover reverse to removal:
Next connect the red and black wires to the wires coming out of the ballast, and plug the connector into ballast:
You'll now need to find somewhere to mount the ballast....
My ballasts had a sticky pad on the back of them , so i mounted the drivers side one one the headlight cover (i fixed the rubber seal after the pic was taken....lol)
And the passenger side one on the inner wing:
That's it turn them on
Do you think i went too blue ? .....lol
I hope this helps some of you out there