Agreed! You have to buy OEM HID headlights for upgrade, otherwise, the modification is not legal and you may take full resposiblity for traffic accident caused by the glaring light comes from you non-oem HID headlight.

You may find lot of OEM HID headlights in eBay with pretty cheap price compare with dealer's price.

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--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass.