Noticed a scraping/grinding noise coming from what I think is the drivers side rear wheel. At 10mph< the sound is rythmic, could be brakes. 03 Coupe with Brembos 38k supposedly dealer replaced the pads at 29k. Thinking about just taking the car to dealer since it's still under factory warrantry. Should I wait and just pop the wheels off and check myself? Or make it the dealers problem?