Pulled over and ran idle for a while at right side level at 0.00. Photo below. Then drove off and it popped up to over 3.0L. Getting close to where I ran out on the highway. Want to see if the reset worked so I will go for a drive later. If I have the issue again then it must be another problem with the siphon system. Interesting that the old sender unit o-ring looked good in place. It was certainly harder for sure.

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2005 X5 4.4i M Sport
2003 X5 4.4i