Quick update.

The replacement was a success. Tested the new fan with INPA before removing everything; the fan ran without problems. Ripped everything apart, replaced the old the fan, ran INPA again and the fan worked. Just in time for 80F degree weather.

Thanks guys.

One question though; is the aux fan triggered by the temperature read by the CTS on the lower radiator hose?

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'06 X5 3.0i