new noise in my 2003 v12
The most common problem is the accumulators . Check your abc fluid to see if it is low. If it's low and there are no Leaks externally then one or more of the accumulators had failed and filled with fluid instead of their nitrogen gas charge : it could also be a squeaking abc pump unable to maintain system pressure over bumps
Accumulators are Cheaper to replace than the abc pump so those would be the first things to check






