I appreciate your fuel system thread, but that isn't the syphon jet where you found the flaw with the o-ring getting pushed out. I just had mine apart to check and I was going to ask you what is inside that section with the pushed out o-ring ? I think it is a flow divider for the syphon jets and possibly some kind of valve but I didn't take mine apart because it was a nice tight fit and didn't want to wreck it.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)