My son bought a Focus and a Kia Rio at the same time. The Rio was used and abused far more than the Ford. When they were due for changing (both same age but far more mileage on the Kia) it was the Kia that was in far better condition underneath. The Ford had more corrosion. They were both bought from the same dealer but the dealer said that Kia were far better at sorting out warranty problems! (ie no hassle)