So at this point, do you guys think the O2 sensor code is a false positive? I'll inspect the wires tomorrow. I can just replace it if you feel I should.

Also, looking at the data I posted, it seems that there's nothing that really stands out as an issue. Even the smooth running data is all very close in the dead center of the spec.

My drive home today was the same. Beautiful highway driving, but jerky on normal roads. Typically the shudder / jerkiness occurs right after the gear shift form 2 -> 3. 1 -> 2 is pretty smooth, but 2 -> 3 is followed but jerkiness pretty consistently now.

Two days ago the car was 99%. The suddenly it just went to crap like over night.

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2008 X5 3.0si
256k Strong