I noticed that the LED headlight retrofit kid is only available for ECE LHD version cars, not available for RHD cars. According to the eBay list, in the Ask a Question, it seems just as simple as swap in and out, no need for wiring harness and code. Is it true?

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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.