The 3.0i mechanical fan is 16.5". The above Explorer fan is 17.5-18". A shroud would need to trimmed to fit a "truck" neck clutch/fan. The IS shroud would likely need to have the fan cut out. A front auxiliary fan would be no problem. I have an article with more Explorer fan info somewhere. I'll look for it. The gap between the IS pump and radiator would be helpful.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)