Does the Turbo have a life span, or is it pretty robust. The reason I ask is that I am coming up to 75,000 miles and this seems to be a threshold for a lot of things to go wrong with the car. I am getting the Cam belt kit, Water pump, aux belt, thermostat and Air con belt changed next week. Is there anything else to watch out for. I keeping reading that the turbo's are prone to failure?