I have a caroq built in 2017. In December it was the first time during the inspection. It was found that the two front brake discs were completely corroded inside (thick rust layer). The exteriors were normally retracted. Both brake discs and the pads were exchanged for a fee, although I have 5 years warranty (brakes are excluded from the warranty). Now I have found that the front brake discs are corroding again on the inside. Dealer I was with today calls this a normal problem when the car is driven little. I think that the brakes have a defect. Did someone from the forum find something similar?