How to install hid on a bmw 325xi 2006

Here is the bmw hid ballast supplier

https://www.iautofitting.com/BMW-headlight-xenon-hid-ballast-factory-supplier.html

INSTALLATION GUIDE:
BMW E38 99-01 HID TYPE 7 Series 1PC Halo Amber Projector Headlights
Parts Identification:
Projector Headlight
Halo & L.E.D.
Bottom of the Headlight:
Ballast Bracket, Halo Wires(red/black)
Turn Signal Adaptor
TOOLS REQUIRE
10mm - 8mm socket
Philip Screwdriver
Crimper/Pliers
For more information about how to install your vehicle, come visit our youtube page on
http://www.youtube.com/spyderauto
Remove the facotry headlight from the BMW. First remove the front panel cover below the headlight to access the bottom screw of the headlight housing. There is also two screws on the top of the housing.
Once you have remove the headlight, turn the headlight around and remove the bracket that holds the Ballast. Then remove the ballast using a philip screwdriver.
Unplug the wire from the ballast, and then remove the Xenon Plug from the housing. Put the Ballast aside.
Carefully remove the D2S Xenon Bulb from the factory housing. Once you have remove the bulb, transfer the bulb to the Spyder headlights.
Remove the bracket from the Spyder Headlight, and then install the ballast on the housing like the original. Once you have put the ballast on, put the bracket back on.
Remove the Panel Cover bracket from the original headlight to the new Spyder Headlights as shown here.
STEP:
Install the Spyder turn signal socket if the orignal does not fit, unplug the factory plug from the harness and plug the new one on.
Install the Spyder Headlight back on to the vehicle. Plug the Harness back on, the halo/L.E.D. Wires is connect to the Parking lights. These wires are optional to your vehicle, you do not have to wire them together.
Factory Xenon Headlight
Spyder Projector Headlight using Factory Xenon Lights
STEP:
pls vote an diam giving you link also for better help BMW e46 HID Headlight Replace

Review this tutorial: How to Install HID inside your BMW E36 – DIY

Also, can review this Car Replacement Light Bulb Size Guide – 2005 BMW 325i 325Xi with HID

I hope helped with this. Good luck (remember rated this).