My Audi Q3 has 20,600 miles and is still within the three year Audi warranty. I noticed there was a vibration when braking from above 60 mph. I took the car in and was told the vibration was caused by one or more distorted brake discs. The garage want to replace all the discs and pads at a cost of £880. I understand brake pads would not be covered under the car’s warranty but feel brake discs being deformed with such a low mileage and driving style suggest some form of manufacturing defect. I hope Audi UK will offer some contribution towards the repair cost considering the car’s age and low mileage but am interested in any comments you might have.