That front bearing is not sealed and will be open to the environment.Cruzer60
got the #6661K86 for the rear
For the front the #4668K327
Hey would you mind sharing that post so I could read through it?Great info and thanks very much for sharing. After about a month of starting to hear some bearing whine, my MGU is now dead with no charging at all. So I'm probably past just a simple bearing replacement and I've got a dead $60k truck.
FWIW, I came across a reddit post showing the bearings as 6003 and 6305. The 6003 would confirm what @UpNorthEngineer measured. Not sure on that front bearing but I'm passing the info along in case it helps anyone.