Xenon "Like" Bulbs by Lefty
 

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There is basically three ways to go if you want to upgrade your bimmer to that Xenon look.

1. Buy bulbs that raise the color temperature of the light they project.  They do this by using a blue filter and/or adding Xenon gas to the otherwise standard halogen bulb.  The downside to these type of bulbs is that they limit the amount of light produced and add glare to oncoming traffic.  The reason for choosing these bulbs is cosmetic. Some of them really do "look" like the real thing.  I chose to use the "Jimmy Xenon" bulbs for my fog and high beams because I got to see first had how they looked.  Not bad, just not as bright by a lot.  This is probably the cheapest option.  Here's where you can buy:

Autolamps online

Autosupermart

Jimmy's BMW Xenon

Xenon Charged Headlamp Bulbs

Here's a performance review of blue bulbs:

Overboost.com - High Performance Headlights


2.  You can buy a xenon upgrade the just includes the bulb and igniter.  The bad part here is you don't get correct beam adjustment, and you don't get the cool ellipsoid lens found on the stock BMW Xenons.  Your onboard computer will give off a warning message identifying that the low beam are out, because they were expecting halogens.  Here's where to buy this type: 

Supreme Power Parts

XenonShop

EuroLights


3.  Last and probably most expensive option is to buy OEM headlight assembly.  It looks the best but will not self-level the beam when the rear of your car is loaded, this will blind on coming traffic.  Plus, your onboard computer will give off a warning message identifying that the low beam are out, because they were expecting halogens  You'll probably have this problem with the option 2 as well.  I have documented a fix for this here.  On where to by this OEM headlight assembly made by Hella see below:

EvoSport (some of the best pricing)

Bekkers 

PACIFIC BMW Parts Department (818)552-4750