If it is the clutch fan you can check it. When the engine is cold the fan should turn noticeably easier than when the engine is at operating temp. If the electric fan has failed you can check that also. It does a diagnostic check when you first start the engine so it runs for a short period of time.

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