I just replaced my yellow halos to LEDs. It took me 15 mins. Remove the cap where it covers the daytime running lights. You unplug the lights, unscrew the bulb and than replace it with your new bulbs. When you are finish MAKE SURE that you have put the cap cover back on correctly. If you don't, water will seep in when you go through a car wash or if its raining and it will fry your lights and thats a $$$ fix. Good luck
