Hi all! My X' rear A/C fan roars sometime, but it still works ok. Just want to know how to replace the rear fan, is it very hard or just a piece of cake? I just bought a used rear A/C fan from eBay and prepare to do it myself. Thanks for help and appreciated if you could upload some pics or detail procedure on how to replace it.

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--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass.