So I bought a used ballast off ebay. It came from a 1999 5 series. It looked the same, and the seller told me that it SHOULD work but he wasnt 100% sure.

i took my chances, bought it and when i put it in it didnt light. I then swapped my drivers side ballast (the good one) to the passenger side & it worked just fine.

So now either he sent me a non wokring ballast or the 99 5 series is not the same as the 2003 x5 ballast.

argh!

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