Audi Headlights Comprehension Guide

[fly300kts]

It seems that there is some confusion between the different headlights installed on the A4 B7 so here is a little guide that should answer most of the questions:

OEM Bi-Xenon

http://i31.photobucket.com/albums/c395/fly300kts/Headlight%20Comprehension%20Guide/IMG_7353Large.jpg

YELLOW ARROW: Bi-Xenon - Bulb Type = D1S
GREEN ARROW: Turn Signal - Bulb Type = 1156 (12V 21W)
BLACK ARROW: DRL (Day Time Runing Light): Bulb Type = 1156 (12V 21W)
RED ARROW: City Light - Bulb type = 158,168,194 (12V 5W)




WHY BI-XENON?

The headlight use the same bulb for Low & High beam. Here is how it works:

This is a picture of the beam housing removed from the headlight. You can see the D1S bulb installed. Also note the grey metal plate in the front.

http://i31.photobucket.com/albums/c395/fly300kts/Headlight%20Comprehension%20Guide/IMG_7399Large.jpg

Same housing, side view: you can see that the grey flap is in contact with the housing: This is the LOW BEAM POSITION

http://i31.photobucket.com/albums/c395/fly300kts/Headlight%20Comprehension%20Guide/IMG_7401Large.jpg

When you select High Beam, via an electro magnet, the grey flap tilts forward: This is the HIGH BEAM POSITION

http://i31.photobucket.com/albums/c395/fly300kts/Headlight%20Comprehension%20Guide/IMG_7402Large.jpg





HALOGEN

http://i31.photobucket.com/albums/c395/fly300kts/Headlight%20Comprehension%20Guide/IMG_7404Large.jpg

YELLOW ARROW: Low Beam - Bulb Type = H7 (12V 55W)
BLUE ARROW: High Beam - Bulb Type = H7 (12V 55W)
RED ARROW: City Light - Bulb type = 158,168,194 (12V 5W)
GREEN ARROW: Turn Signal - Bulb Type = 1156 (12V 21W)

I think I covered everything and now it makes sense for everyone
Let me know if any question

Phil

[JMG]

Thanks for the awesome post fly! You should add this to the wiki...

[fly300kts]

Thanks for the awesome post fly! You should add this to the wiki...

Your Welcome
Since you are a moderator, can you do it?

Phil

[Mc Suly]

PERFECT!!

BLACK ARROW: DRL (Day Time Runing Light): Bulb Type = 1156 (12V 21W)

Now i know what type of bulb specifications to get when getting a white color without throwing an error!!!

[Kipper984x]

awesome post, very helpful

[fly300kts]

PERFECT!!

BLACK ARROW: DRL (Day Time Runing Light): Bulb Type = 1156 (12V 21W)

Now i know what type of bulb specifications to get when getting a white color without throwing an error!!!

Well, here is the catch in your case:
I assume that you will be looking for LED but you will not find an LED replacement with a 21W draw. They will need to have a resistor built in and I have not seen, yet, these in 1156 socket type

Phil

[Mc Suly]

Forget the LED then I'll just stick with the regular bulb and find a white one :)

[fly300kts]

Forget the LED then I'll just stick with the regular bulb and find a white one :)

10-4

Phil

[Zac]

Nice little write up Phil!

[PPLAPW]

Awesome post Phil, I appreciate the effort you put into this. [:D]

Hopefully this will decrease all those headlight inquiries you get...

[ryanworth]

Excellent work again sir!

[beantown]

Thanks Phil; excellent reference guide. (Especially to keep all the noobs at bay.)

[Gabesta]

Phil: Making our lives easier, one post at a time.

[hail]

[fly300kts]

Thank you Guys, just trying to help the Community

Phil

[fly300kts]

Awesome post Phil, I appreciate the effort you put into this. [:D]

Hopefully this will decrease all those headlight inquiries you get...

I doubt it [:D][:D]

Phil

[CoDRoX]

Great post [up]

[excelb7]

hmm, I thought there was a oem Halogen projector equipped with b7's as well. So if its an oem projector, its always bi-xenon?

[fly300kts]

hmm, I thought there was a oem Halogen projector equipped with b7's as well. So if its an oem projector, its always bi-xenon?

Sorry, I have nothing in store if you don't know how to read

Phil

[excelb7]

Sorry, I have nothing in store if you don't know how to read

Phil

I know how to read thanks. I must've just seen an after market headlight then.

[arce909]

Sorry, I have nothing in store if you don't know how to read

Phil

Hahaha!!!

[Inked]

great write up...answers my questions!

[brownishwater]

It's too bad only a handful of people will read this before asking whether they have xenon headlights or not.

Great write-up nonetheless.

[Otter11]

Great write-up nonetheless.

a positive comment comes in from brownishwater hahaha

Nice write up Phil. Thanks

[Rahbey]

Awesome post Phil! My city lights are out for delivery now and should be here shortly. I was planning on just going to the garage and fiddling with the different bulbs but I can already tell this post saved me a lot of time.

Crossing fingers on no code .....

[Audibot]

Thanks Phil; excellent reference guide. (Especially to keep all the noobs at bay.)

Lofty assumption haha

[fly300kts]

Awesome post Phil! My city lights are out for delivery now and should be here shortly. I was planning on just going to the garage and fiddling with the different bulbs but I can already tell this post saved me a lot of time.

Crossing fingers on no code .....

Glad I was able to help

Phil

[TheKid23]

Bi-xenon pic showing for everyone else? All other pics are working.

[fly300kts]

Yes all the pics are working

Phil

[TheKid23]

I PM'd you a question Phil!

[fly300kts]

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