Found this guide on E46Fanatics forum, once again from the epic DIY-er ‘sillieidiot’, original thread here: http://forum.e46fanatics.com/showthread.php?t=609544
***Note: Follow this at your own risk. I am not liable for any damages or injuries that may have resulted or caused by this DIY.***
– A pair of brand new bulbs (d2s is the size)
– Latex gloves (or any other kind) – It’s not really needed, but I would have it to keep you from accidentally touching the bulb
– Small hands LOL (if you don’t have small hands, i would consider moving the headlights forward or take them out to make life easier on you)
First, you would want to take off the plastic back cover that keeps the dust and other harmful stuff out. It’s just held on by a tab and 2 little prongs. If you were doing it on the car, you would push down on the tab, remove it away from you, and pull up.
Here is what the cover looks like:
Next you would remove the igniter. It’s a black/red piece connected by a couple of black wires (which are connected to a module inside the headlight). To remove, all you need to do is twist it a quarter turn to the left (or to the right if you are working on the car). Then pull straight out.
What it looks like from the back:
From the top:
Next would be to remove the bulb holder (which is a black plastic ring pretty much). Same thing with the igniter, quarter turn to the left (or right if you’re working on the car), and then pull straight out while holding the bulb in place with a finger. Else you’ll damage the bulb or drop it.
As you can see, there’s the word “Top” on the bulb holder to tell you which way the holder should be facing when you put it in, so you don’t have to guess.
To remove the bulb, just pull straight out, carefully else you’re going to break the ceramic return wire (which will greatly reduce the bulb’s life). There’s very little room in there, so be careful.
Well there you go, we are halfway done. Most people will just stop their DIY here and just say do the reverse. It’s not really a complete DIY i guess lol, but I thought I’d just keep going for the sake of answering questions that will arise from that.
To put back the bulb, carefully push it back into the headlight. There are 2 notches (one is a square, the other is circular) to line it up to. Also make sure that the return wire (the ceramic tube you see running along side the bulb) is facing down.
Here’s a picture of the projector and the 2 notches:
While holding onto the bulb with a finger (like when you took out the bulb holder earlier), put the bulb hold back in. Make sure the word top is actually on top. There are slots here for the bulb holder to go in, so when you get it in, you will feel it come down, then turn it right (left if you’re working on the car) and you will feel it “click.”
I couldn’t take a picture of that like I did when taking it apart, but here is what it should look like when you’re done:
Next push the igniter back on. You probably already noticed it, but the igniter itself has some slots/notches that go onto the prongs on the bulbs. push that on, and turn it right (left if you’re on the car), and it should click into place.
Finally, put that dust cover back on. Slide the 2 prongs into the slots on the headlight, and click it in. And you are done.
You can thank ASAed330 for the DIY. Even though he didn’t ask for it LOL