I purchased a used 2011 e92 335i with 6700 miles on it. Took it to the dealer the day I bought it for service and to check the brakes since they did not feel right. SA said the brakes had a lot of rust build up because the car was washed a lot but not driven (car was on the lot for 8 months) He told me to change rotors and pads would be $1200. I thought this should have been covered under warranty but guess not. So not driving your car will void brake warranty also.