I went with the Sylvania Zevos in my E53. Had them in my E36 and E31 both with 20% tint all around and it definitely improved my nighttime visibility. They were around $25.00 at my local Advance Auto Parts. They do not throw any codes in any one of the aforementioned vehicles. In the E53 they do flicker a little bit on startup as the LCM runs its self check of the vehicles lights. If you can live with a little flickering they are well worth it, I believe they carry a lifetime warranty as well.

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2004 BMW X5 4.4i-Sports Package-Premium-140,000 Miles