hi just wanted to know how many miles i should expect to get out of my s60 2.0t it has been well maintained with 119000 miles also if any engine parts need replaceing at certain milage my car has no service history but ive just gave it a major service,another thing if anyone can help ive lost the back of my key so no battery so imobilizer doesnt work can i just buy any replacement key the same off e bay [as ive seen them on there] put a battery in my key and use the back off it and it'll work again? thanks