15k noticed oil burning smell coming through the vents - Dealer replaced PTU unit.

Same thing happened again at 37K and Dealer said new and improved PTU unit was available, ordered part.

3 weeks later PTU unit was replaced.

couple weeks later.....so far so good.
(I remember thinking this after the first time)
Hope this isn't a Toyota type problem

I am still on a waiting list for my first ptu seal, have been for a month now