Originally Posted by
diagnosticator
Are you sure your A4 has OE Xenon/HID headlights? Xenon = HID. There are regular halogen incandescent lamps that are labeled as xenon but really are not the same as real Xenon/HID.
If you do have OE Xenon/HID headlights, two factors will cause low light output. 1st is that the HID burner lamps get weaker as they age. The second is that the projector reflector bowls get burned over time and loose the reflective mirror coating. Your problem is most likely a combination of the these two separate problems.
You can buy replacement Valeo HID projectors to fit into your headlights, and buy a pair of new D1S HID burners/lamps on eBay, or from a HID specialist shop like HID Planet, etc.
If your headlights are stock halogen incandescent, the same damage can occur to the projector reflector mirror bowls reducing light output.
Dirty projector optics will contribute to reduced light output with either type of headlight. The projectors acquire a film of dirt on the optics over time.
Mine are the zenons. They are the self levelling ones, came with lighting package (compass in mirror, DRL timer, etc.).
My headlights have the HID blue color, just the output garbage. Do you know of a link for a replacement projector?
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