Changed the Final Stage Resistor. Fan was a little erratic over the winter and I ordered the replacement FSR months ago. We had a heat wave this past weekend and the fan speed wouldn't change much at all in auto or manual mode. Hating being hot trumped my laziness so finally did it! Took about an hour and a half and everything works great now.

Thanks to Xoutpost for the DIY.

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2003 X5 4.6is
Titanium/Black