Description is good enough for me. It's the bush on the suspension arms on both sides that is defective. There are 4 arm on each side -bottom, 2 top so the arm in question is the upper rear arm, not to be confused with rear suspension arms. it on the front supension and one of the top arms, just the one that is more towards the rear. It's not the whole arm that failed, just the bush and while you could replace just the bush usually the whole arm gets replaced due to labour costs and possibility that ball joint at the other end of arm might fail soon as well.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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