I've seen a couple axles that were a disaster but a quick preview when you pull the roundel if you don't see rust and the axle nut is crisp and clean you should have clear sailing.

There biggest help I came across was the bit where I loosen the strut bolts when putting CV in or out. I spent 90 minutes trying to get CV back in and it wouldn't. Out of desperation I losened the tower bolts and the rubber boot of the CV shot the axle completely through the hub! So now I always start the CV through and start the nut before I m reattach the tower bolts

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)