yea, I had OEM HID. uninstalling the OEM bulb and installing the mod bulbs werent a problem, fairly easy. Driver side however has significantly less room to get your hands through. Im unsure of why the adaptive lights would need adjusting when i just removed the bulbs, but i plan to learn as much as i can for furture knowledge. I did happen to find OEM replacement headlamps on ebay for half the price the dealer was charging.