swap s4 xenons to my a4

**ivoryman50** · 01-01-2009 12:51 AM

i have an 02 a4 and my roommate has an 04 s4. he just got bi xenons and i wanted to know what i would have to do to retrofit his stock single xenons into my a4. thanks in advance for any help.

**A4 Moda** · 01-01-2009 12:55 AM

be a good roomate and you'll get them for free.

But seriously, Nothing. Just remove two top screws on the radiator mount, and losen the bottom 2 screws on the headlight tray. They don't need to be removed, just loosened.
Then slide the headlight out, use a flathead to unlock the wire harness clip, and then swap.

You're done

**B6JoeS4** · 01-01-2009 10:10 AM

i belive the top ones need to be removed completely

**cjonesgo** · 01-01-2009 02:57 PM

Originally Posted by A4 Moda

be a good roomate and you'll get them for free.

But seriously, Nothing. Just remove two top screws on the radiator mount, and losen the bottom 2 screws on the headlight tray. They don't need to be removed, just loosened.
Then slide the headlight out, use a flathead to unlock the wire harness clip, and then swap.

You're done

this is true if the headlight is complete (bulbs, ballasts...) if NOT, then it is slightly more involved. there are a few writeups on here somewhere.

**ivoryman50** · 01-02-2009 11:05 PM

the headlights are not complete. i will be using the bulbs and ballasts from my a4 single xenons which are not the slim ballasts that the s4 uses. would that be possible to do?

**heateris** · 01-03-2009 06:23 AM

Originally Posted by ivoryman50

the headlights are not complete. i will be using the bulbs and ballasts from my a4 single xenons which are not the slim ballasts that the s4 uses. would that be possible to do?

yep, just a simple plug and play. enjoy the new look!

**cjonesgo** · 01-03-2009 11:16 AM

not necessarily, this is what i had to do when changing to s4 bi-xenons from stock xenon:

•new high beam bulbs.
•modify the 'door' the ballast fits into. it's a 5 min job if you have a dremel. took me 15 with a drill and a hacksaw. and a bit of silicon as a "just in case"
•move a wire to a different pin on a cluster plug.

maybe different on s4 single xenon, ,but this is what i had to do. nothing was a big deal, but not 'plug and play'

**heateris** · 01-03-2009 08:47 PM

Originally Posted by cjonesgo

not necessarily, this is what i had to do when changing to s4 bi-xenons from stock xenon:

•new high beam bulbs.
•modify the 'door' the ballast fits into. it's a 5 min job if you have a dremel. took me 15 with a drill and a hacksaw. and a bit of silicon as a "just in case"
•move a wire to a different pin on a cluster plug.

maybe different on s4 single xenon, ,but this is what i had to do. nothing was a big deal, but not 'plug and play'

he's not upgrading to bi-xenon's...