Perusing thru the online TIS...it looks like the bumper needs to be removed before the aux cooling fan can be removed. But the front bumper removal instructions don't look that difficult either (there's instruction for that too at the TIS online site).

Below are aux cooling fan & radiator removal instructions for the M54/M57/M62 engines used on the X5 (see how important model details are? ). BTW...the links along the top of the page are live...so you can click backwards to see how I navigated to these DIY instructions...as well as checking to see if there are other TIS instructions you may need.

Radiator removal instructions:


Aux cooling fan removal :

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• 2015 f06 650ix GC (Moonstone exterior/Cohiba brown Merino Leather interior)
• 2014 f15 X5 50i (Space Gray exterior/Mocha Nappa Leather interior)