One problem related to brake grinding noise has been reported for the 2009 Jeep Wrangler. The most recently reported issues are listed below.
Less than 30 days after purchasing my 2009 Jeep Wrangler unlimited sahara, I was driving it and went to press the brake pedal while the vehicle was in motion going approximately 35 mph. When I pressed the brakes I heard a grinding noise, my vehicle slowed down slightly but not as much as it normally did, it pulled to the left, and wobbled whenever I pressed the brakes causing me to momentarily loose control as a result of it fish tailing. I was unable to stop or slow the vehicle in the same amount of time as it normally took to do so. I immediately drove to an auto mechanic. I took it to pope davis tire & automotive located at 631 s assembly street in columbia south carolina where I was told my the manager, frank floyd that the fluid went bad and caused damage to all 4 hydraulic hoses, callipers, and rotors, and that they along with my pads all needed to be replaced. It cost me approximately $880. I found out later that there was an recall on the same year, make, and model. However, my specific VIN number did not have this recall. I feel that it was overlooked and I should be reimbursed.