Dang...I was hoping the whole FSR problem was resolved with an updated part on more recent e53's. Was the the part you replaced it with the same as the original? I'm guessing my 2005 4.4 is also "at risk"??

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2005 X5 4.4 (Sterling on Truffle) w/sport everything
2011 Audi S4 (Prestige, DSG)
2012 Audi Q7 (Sport, S-Line)