Audi TT The Audi TT line, in both the coupe and roadster combines Audi's All Wheel Drive performance with the feel of a European sports car.

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

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Old Nov 23, 2014 | 10:34 PM
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whemurad's Avatar
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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 Thumbnails Xenon HID headlight lost brightness and has a red-ish look-bad-xenon-hid-light.jpg   Xenon HID headlight lost brightness and has a red-ish look-bad-xenon-hid-light-2.jpg   Xenon HID headlight lost brightness and has a red-ish look-comparison-xenon-hid-lights.jpg   Xenon HID headlight lost brightness and has a red-ish look-good-xenon-hid-light.jpg  
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