I had to replace that on mine but it was a long time ago so I don't remember what kind of noise it was making but I'm thinking it was more of a rubbing noise?? I had to replace the U-joint assembly as well for the slight knocking, unfortunatley it started that again but I shouldn't be surprised as I bought the vehicle with 190k and now have 430k km on it!

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)