I've had a heap of work done on my GT prior to my ownership. A turbo hose was replaced a few years ago but the turbo itself seems to be original. The car has seemingly been looked after all it's life but the turbo must be near the end of its life at 191k. What sort of lifespan is usual for the stock turbo given what I've said and what sort of cost would I be looking at to have one fitted at an independent alfa garage? Currently no odd noises from it and it seems to be working OK.