First fix I did on my e53 since the PO replaced only one so I had one purple headlight with 30% the brightness.
$40 for a set of 5k beauties that lasted the entire time I had that car!

Same with my e70 not two months after purchase one side goes out! Added bonus with e70; only one lamp per side so no high or low beam!

This time I went with 4000 getting closer to nature. The higher the kelvin the less 3d you can see when you need it. Eg trying to avoid deer or simply follow the road. You can see 10-20% farther on a country road with 4k vs. 6k.

I loved the look of the 5k that matches concrete jungle but I'm sticking with the see better. With e53 I had halogen high beam so great 5k city and 3400 country but with one lamp best stick with 4k

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)