My A4 is currently in my local Audi garage getting MOT'd and they've informed me that the bleed nipple has snapped off on one of the calipers :-(. They mentioned last time that it had cracked so it's obviously bit the dust. Never had one crack or snap on any of my cars before - very odd.
Anyhow in terms of getting it replaced Audi are probably going to want me to pay for a new caliper which will be god only knows how much. I'm guessing my best option is sourcing a decent used replacement? And if I can source one will Audi fit second hand parts that you supply? The reason I ask is i'm trying to keep my Audi service history for now as the car has only done 75k and I expect the balance shaft failure at some point. I took out a warranty to cover it and this covers me to get the repair work done at Audi which i'd prefer.