I'm currently doing a quick overhaul on mine. Fixing reluctor rings, swapping in a new to me transfer case and hoping it works. You know, regular x3 stuff. Also working on a preventative rust abatement stuff since I live in the rustbelt of upstate ny.

I thought I should add that the car runs great at 150k. It is the pinnacle of bmw's development of the m54. It's nice to know that under better than normal care 250k on the engine shouldn't be hard to reach.