application of use plays a bit part in their life span
ie open mounted, poor filtering, std airbox and std filter, exposed cheap pod filter, no inline oil filter, plain bearing without cool down / idle down cycle
my std turbo is 223,000 kms old and still going well but that's not the be-all and end-all
apparently
there is a 100,000 rebuild "criteria" that nissan used when there was no BOV used
but i have no records of it, and no data to back it up, the rumor is that the service interval changed when they fitted std bovs