We have a 54 grandis (second owners) bought from local car supermarket in 06. It's developed a grinding noise when we turn left or corner left around roundabouts. Our local Mitsubishi garage fixed it initially saying that the metal cover around the wheel block was catching. Its now doing it again and they have said that the only way to replace it is to get the whole wheel drive replaced at grat expense?
Any ideas what it could be?

Thanks

Lucy