When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Sometimes all they need is a shot of lubricant to free up. Had this happen to both fans in my 5 series BMW and it worked both times. Never had to replace them.
If you pull the fan shroud for repairs, I recommend that after you unclip the shroud from the radiator you slip a piece of cardboard between the shroud and radiator to protect the radiator fins while you work the shroud out. I took mine out the top.
Also, I was unable to get to all of the clips and motor plugs on the fan shroud without first unbolting the stabilizer bar hold downs. Then the stabilizer bar could be moved out of the way without unbolting the stabilizer bar end links.