As an FYI if you do change your HID bulbs, you do not need to drop the bumper. I wrote the below thread up to help anyone trying to change thier HID bulbs - they key is understaning the bulb retaining mechanism and how to get it off in order to get the D1S bulb out.I'm glad you had an easy time with YOUR type of headlights. You never qualified your post with which year and or type of headlight system you have. From reading your post, you obviously have standard halogen bulbs which, yes, are easy to replace where only the bulb needs to be pulled and replaced. Many, many of the Cadenza's purchased came with the HID self aligning headlights in which (as best my research and knowledge supports) you MUST remove the bumper, etc to access the light assembly to then access the HID bulb for replacement. Fortunately, they have a super long life so many of us owners have not had to do that yet. Personally, I have a 2014 with almost 100k miles so I'm expecting this to come up soon. A few have purposely wanted to upgrade their HID's and did so before the end of life of the original bulbs.
Since I have an extra projector out of the car, thought it would be worthwhile to show how to get the D1S HID bulb out while it's in the car. Some pics of the bulb retention clip. You can see that the clip is held on with tension You have to press down on the top tab in order to...