Our 09 reg Copen nearly failed its 2nd MOT due to corrosion on the inner face of both discs. Discs were replaced 2 years ago under the 5 year warranty. All the wheel nuts have lost their chrome and local dealer (very expensive) wanted me to pay for the parts and nuts and their labour then apply to Daihatsu for a refund. I told them no way I would do this as the car was still covered by the 5 year warranty. They then asked me to bring the car to them so they could take photo's of the problem and send off these to Daihatsu. I have sent photo's I have taken to Daihatsu and have received a automatic reply but no further action. Has any other members had the same problem? Rest of the car is rust free even as it has stood outside from new.