I was cleaning out the garage and found a differential input shaft seal that I had misplaced multiple years ago when I was rebuilding my M3 diff.
It's for sale for $35 --> $30 obo shipped within the states.
p/n 33121213949
Unopened
If interested, PM me your number and I can send you a picture of it.
It's the same as this -->
https://www.ecstuning.com/b-genuine-...h/33121213949/