I think I've said this about 10 times now.
When you hear a louder noise/vibration or feel something out or sorts, 9 out of 10 it's the lower mount

For whatever reason, all they seem to be good for is about 80-100K miles, tops on an AWD Volvo but seem to stay together on a FWD car.
Also they seem to crap out much earlier on a 2.4T (gen 1) over a later 2.5T P2 wagon