There are several variations of electric fan installs here. IMO some of the versions are more complicated and expensive than they need to be. I think mods should pass a value test--How much do you have to spend weighed against the benefits. I spent a total of about $300 and the install took about 3 hours. Other methods may be better, but after 6 years from the install with no problems other than the controller I destroyed myself, I would do nothing different than I did then.

I don't think it is necessary to purchase an expensive fan. Nor anything other than a simple variable controller and a probe that goes through the radiator fins. In addition, The fan does not need to cover all of the shroud opening. I calculated the area of the radiator and that of fans to find the fan that covered the largest area of the radiator without modification to the shroud or having to completely remove it. Don't be concerned about running the battery down if the fan runs after the key is off to eliminate heat soak, it won't. As long as you have a variable controller you don't have to be concerned about the accuracy of a probe in the radiator fins since you can set it to come on where you want it to.

However, my goal was to free up HP/TQ and eliminate heat soak. If improved performance was not my primary goal I would have left the clutch fan in place. The electric fan would not have passed the value test.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas