Same thing happened to my CX-7, bought with ~75,000kms, serviced strictly and the same shaft snapping happened at 102,000kms on the dot. FYI the caking of the oil feed is due to the exhaust gas finding a new path down the oil inlet after the wheels fall out of the bearing. Caused me to dump a few litres of oil on the driveway as I returned home after hearing the turbo go pyyyooooooooongggggg!
Got a total of 500 meters from the house and it let go, crank pressure through the turbo oil feed blew the dipstick out along with the oil
Took me the good part of a weekend to replace the turbo.....longer to clean the engine bay.