Xenon HID bulb color shifted
2004 E60 525i, with 90K miles. It has Xenon HID light and adaptive light control.
Yesterday I noticed the driver side Xenon HID bulb's color changed to pink/purple. The sequence is:
1. the two HID bulbs immediately at time of turned on have the same normal white color.
2. Then in ~2 seconds the color on the driver side starts to change gradually to pinkish, and will stabilize at the pink/purple shown in the attached photo after ~7 seconds.
Questions need your help:
a. Is the blast on the driver side the problem, or we know for sure it is the driver side HID bulb?
b. If it is the bulb failure, is it as simple as just replace it or something has to be done/checked at the blast?
c. Researched at O'Reilly site, which showed two different brands both have "part number" as D2S. How do I verify this old failed bulb is D2S and the O'Reilly part will work?
c. Amazon.com shows all kinds of D2S HID bulb (no referenc eof Xenon, not sure why), prices range from $5 to over $100 each. What the heck - why are they that different? Since this is a DIY, I don't mind to a pair of cheap bulbs and replace both. Just want to make sure they will light up and will not cause error codes. thought?