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Xenon HID headlight lost brightness and has a red-ish look

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Old 11-23-2014, 06:31 PM
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Default Xenon HID headlight lost brightness and has a red-ish look

I own a 2001 Audi TT Roaster Quattro 1.8T, with the original headlights installed.

One of the Xenon HID headlights in my car is dimmed (less brightness), has a red-ish look and does not work nearly as well as the good headlight one. If I am looking at the front of the car, the left low beam has the problem described, while the right one is fine. I attached 4 pictures of the front of the car to illustrate my explanation:

1. Bad Xenon HID light (probably the best to see the problem)
2. Bad Xenon HID light 2
3. Comparison Xenon HID lights
4. Good Xenon HID light (good to see the difference in color and brightness)

What is the problem? Which part needs to be replaced or cleaned/fixed?

Thank you!
Attached Images     

Last edited by whemurad; 11-23-2014 at 06:34 PM.
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