I took my R in for the 30K mile service about 2 months ago, at which point I was getting a nasty shake through the steering column when the brakes were applied. This was diagnosed as warped rotors and replaced under warranty. Now I am starting to get a slight vibration under braking through the wheel again and I'm wondering if/how this could have happened again and so soon? <p>The car has not sat for long periods without being driven, nor have I treated the brakes too harshly. When I wash the car, it has always been first thing in the morning, so I know it's not like I went out driving like and then sprayed cold water on the rotors. <p>Any thoughts? Could it be something other than the rotors at this point?