thinking about the bending wire comment. That would probably throw off an accurate reading of fuel left in the left tank. I assume the existing bend is set to a particular value at the factory. I am ruling out this as this is the 3rd sending unit. The original was replaced be ause I thought that was the issue (before I read about it). The replacement was off ebay. Same issue. I decided to get a genuine one and replace that. Same issue. Will post again when I have the fuel system fixed and the answer.

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2005 X5 4.4i M Sport
2003 X5 4.4i