How do I know if these headlights are xenon?

[Charlescrs6]

Sorry, probably a noob post. Part #8E0 941 004 B

They're Valeo, on the back it says H7=Halogen and D1S=xenon which leads me to believe they're xenon, however I'm not sure.

[BCsniper]

Sounds like the Single Xenon to me

[dmaxben]

yep single xenon, auto-leveling. Same ones that I have on my car (2004). I think it was 05 when they went to bi-xenon?

[Charlescrs6]

yep single xenon, auto-leveling. Same ones that I have on my car (2004). I think it was 05 when they went to bi-xenon?

Yeah, 04.5 and 05 A4s had bixenon. The connection plug for the main bulb looks to be halogen though.. I'll figure it out when I take out my stock xenon headlights out next week to put in my bixenon ecodes.

[dmaxben]

Yeah, 04.5 and 05 A4s had bixenon. The connection plug for the main bulb looks to be halogen though.. I'll figure it out when I take out my stock xenon headlights out next week to put in my bixenon ecodes.

ahh ok. Thats weird they did a mid-year changeover, I just assumed they waited until the next model year. Mine is an 11/03 car.

Are the bi-xenon lights that much better? I have zero complaints about my single-xenon lights. Do the bi-xenon lights just have two separate xenon bulbs? A second/brighter xenon bulb in place of the 'old' halogen high beam??

[Charlescrs6]

ahh ok. Thats weird they did a mid-year changeover, I just assumed they waited until the next model year. Mine is an 11/03 car.

Are the bi-xenon lights that much better? I have zero complaints about my single-xenon lights. Do the bi-xenon lights just have two separate xenon bulbs? A second/brighter xenon bulb in place of the 'old' halogen high beam??

They've got a "flap" that opens in the high beam so your high beams actually come from where your low beams come from. Versus on a Single xenon car the xenon comes from the projector, and the high beams are from the lens on the left. On bixenon, the lens on the left is for when you pull the stalk back and flash something, versus if you put the stalk forward the bixenon 'flap' opens up.

So basically, both bi and single xenon have one H7 bulb and one D1S bulb, but in the single xenon the H7 is used for flashing and for high beams, versus in the bixenon the D1S is used for high beams, and the halogen is used for flashing.

In this picture you can see the visual differences between the two.

[AudiA4_20T]

look at the plug for the bulb

[angep18t]

They're not cause you have them.

[dmaxben]

They've got a "flap" that opens in the high beam so your high beams actually come from where your low beams come from. Versus on a Single xenon car the xenon comes from the projector, and the high beams are from the lens on the left. On bixenon, the lens on the left is for when you pull the stalk back and flash something, versus if you put the stalk forward the bixenon 'flap' opens up.

So basically, both bi and single xenon have one H7 bulb and one D1S bulb, but in the single xenon the H7 is used for flashing and for high beams, versus in the bixenon the D1S is used for high beams, and the halogen is used for flashing.

In this picture you can see the visual differences between the two.

Good info, thanks.