Brakes rear / spark plugs new after approx. 67000km

Hello all, I had my Kia Ceed 1.6 SW petrol engine the days for inspection. Among other things, the brakes were made completely new at the rear and the spark plugs were replaced. Car has EZ March 2010 and about 67,000 km down. How are your experiences? I bought the car used and of course do not know how the two predecessors drove with it. Nevertheless, I would not have thought that after the mileage these parts had to be changed already. Opinion or experience.