View Full Version : Fiat 500 Abarth HID/Zenon headlight upgrade write up.

10-31-2013, 01:54 PM
Just finished installing the 500 Madness HID light kit (4300k) on to my 2013 Abarth. Tought I'd share my experience. The kit itself was very nicely packaged. There are no external wires so the end result is a clean looking install.

Hi/Lo beam concerns.
Prior to purchasing this kit, I was worried about the High and Low beams and through I would need a dual filament type or Bi-Xenon bulb but it turns out the Fiat headlight housing did not need it. The projector headlight beam housing has a built in mechanical shutter that opens up fully for High beam mode and closes half way for low beam. Single Xenon beam is required.

Installation notes:

Driver side headlight:
The installation was pretty straight forward. The stock light cap must be replace with their ballast-built in light cap. For the driver side headlight, there is plenty of room to get this mounted however, the "O" ring seal that comes with the new cap is somewhat thicker than stock. I found the thickness of the new "O" ring seal makes it very difficult to twist on the new cap. I recommend replacing the new "O" ring seal with the stock "O" ring seal. This will make the new cap easier to twist on.

Passenger side headlight:
Directly behind the headlight assembly there is a remote radiator reservoir that gets in the way from mounting the thicker light cap. I had to remove the reservoir and the bracket underneath it to be able to twist the new headlight cap on. Just to get more clearance I've also loosen the headlight bolt. See pictures.

After putting everything back together, the reservoir was pushing on the headlight cap. I decided to trim the bracket to leave about 1/8" clearance. The part that touches is painted silver to make it easier to illustrate. See picture
Again, I used the stock "O" ring to make it easier to twist the headlight cap on.

Shadow in the beam.
I notice what everyone else was seeing with this kit. There is a shadow or a portion of the projected beam that is much more pronounced with the driver side headlamp. From what I can tell, this is from the Xenon bulb's electrode that runs up the side of the bulb. See pictures. I have other HID bulbs and when twisted in and fully seated, the electrode line would line up at the bottom. (The project beam lens will inverse and make it appear at the top which is out of vision) With the 500 Madness kit, the electrode wire is pointed up and to the right (when viewing from behind the bulb) which is why it's shadow appears on the bottom and left.
I hope in the future, with newer revision of the bulb, the electrode line will be moved to alight to the bottom instead which would clear this problem.

Overall, I am very happy with the kit and fitment.


10-31-2013, 09:32 PM
Welcome to the forum.

Sounds like a DIY so moving it there.

11-01-2013, 09:20 AM
Sounds like staying with the stock bulbs is a better option!

11-01-2013, 10:43 AM
Thank you for posting the guide and glad to hear you like the kit.