Had the same probs with my wrx 2004 2 years ago fully serviced oil changed every 6 months car had done approx 37k not driven any harder than any one elses,Subaru head office say they have never had any probs with cranks lol,cost me 2400 to put rite that was doing work my self,ps when mine started i was driving in traffic through town 20 to 30 mph no warning what so ever. Good luck with the transplant