Hello, I have a 2004 passat glx. I'm not too educated on headlights, so I was wondering if someone could explain what type of headlights work in the passat. Thanks for the help!
H7 halogen bulbs work. Anything else does not work without modification. That includes plug and play HID kits. You are modifying the circuits initial design. Dont use the HID kits. Period. If you want HID's do it right and do a complete retrofit with all the needed parts to make the system work properly.
No. 2944 - BMP - SOLD
2002 Matte white with pearl (dipped) 2002 Passat GLX, 5 speed, (1 of 22 in N.A. in this configuration) Koni coils, Hella bi-xenon retrofit, ECS stubby antenna, de-badged, B5 all red tails.
Now, HIDs are normally about 4300K. They can be made bluer than that, but the efficiency drops; as does our eyes ability to use that light. At 8000 or 10000K, they'll be effectively useless as headlights.
Retrofitting HIDs into halogen housings isn't quite plug-and-play, but it's not all that difficult. Some people like the results, but in fact they really don't work the way they should. The HID capsule is a different shape from the halogen bulb, and it throws the beam pattern off quite a bit.
Buy an H7 HID kit, and start reading how to do it. Your B5.5 should already have projector headlights, though they are meant to be used with halogen bulbs, I've put HIDs in the same projectors without seeing any huge problems. And people will tell you that you need to run a relay and therefor install a fair amount of wiring. I've never run a relay kit on HID retrofits I've done. A B5.5 was available with HID headlights, so there shouldn't be a need to change the wiring because you're adding HIDs.
So I'd buy a 35W 5000k H7 HID kit, I wouldn't go above 5000k, it'll give you that slightly blue tint you want without totally degrading the visibility of the light. 6000K and higher look trashy to me, like you're trying to enter your car into a "fast and furious" movie.
I bought a new set of DEPO headlight housings that already had the HID bulbs installed. They were plug and play save for having to pull the DRL relay, and mount the ballasts.
Stock Low beam:
HID Low Beam: