2009 CHEVROLET COBALT SS Complaints

REAR BRAKES ON MY 09 SS COBALT WERE GROOVED SO I HAD THE DEALER LOOK AT THEM, THEY SHAVED THEM DOWN AND DID NOT REPLACE THEM WHICH THEY SHOULD, THESE BRAKES CONSTANTLY GRIND AND SQUEAK EVEN THOUGH ITS A BRAND NEW CAR. MY BRAKES ON MY 2000 IMPALA ARE FINE BUT FOR SOME REASON THE BRAKES ON THE COBALT GRIND AND MAKE LOTS OF NOISE AND DON'T SEEM HEALTHY. *TR

MY COBALT WAS PURCHASED 3/5/2009, AND HAS ONLY 5400 MILES ON IT AS OF 9/8/2009. I DO NOT DRIVE AGGRESSIVELY AND THE CAR IS PRETTY MUCH JUST DAILY DRIVEN TO WORK/HOME. THE REAR BRAKES ARE ALREADY EXHIBITING WHAT I'D CONSIDER TO BE ABNORMAL WEAR, ESPECIALLY WHEN COMPARED TO MY OTHER VEHICLES. THE ROTORS ARE BECOMING DEEPLY SCORED AND THE INSIDE BRAKE PADS ARE WORN MUCH MORE THAN THE OUTSIDE. HAVE BEEN TOLD ME THIS IS "NORMAL" (ALONG WITH A HOST OF OTHER ISSUES, INCLUDING OIL LEAKS FROM THE ENGINE). THERE ARE SEVERAL HUNDRED PEOPLE ON A NATIONAL COBALT FORUM ALSO EXPERIENCING THIS ISSUE. THE ROOT CAUSE APPEARS TO BE THE PARKING BRAKE NOT FULLY ALLOWING THE CALIPER TO RETRACT, BUT I'M NOT AN ENGINEER. *TR

I JUST BOUGHT MY CAR IN APRIL OF 2009. I OWN A 2009 CHEVROLET COBALT SS AND I AM SEEING A FAIRLY QUICK BRAKE WEAR RATING ON THE BACK BRAKES. UPON CLOSER EXAMINATION, I NOTICE THE BRAKES HAVE SOME PRETTY DEEP GROVES WHICH I HAVE NEVER SEEN BEFORE ON BRAKES DISCS ON A CAR. I RESEARCHED THESE GROOVES ONLINE AND APPARENTLY ITS CALLED "SCORCHING". ITS WHAT'S RESPONSIBLE FOR WEARING THE BRAKES AS QUICKLY AS THEY ARE. IT SEEMS TOO BE CAUSED BY FRAGMENTS OF METAL NOT FILED DOWN ON THE REAR CALIPERS ETCHING OUT THE REAR ROTORS. ITS ALSO BEEN BROUGHT TO MY ATTENTION THAT THE CALIPERS COMPRESS THE REAR ROTORS HARDER ON THE INSIDE OF THE ROTOR THAN THE OUTSIDE. THIS MIGHT BE ANOTHER REASON TO THE SCORCHING. *TR

1. CAR IS A DAILY DRIVER, SO NO ABUSE OR ANYTHING. 2. REAR BRAKES ARE SQUEALING AGAIN AFTER BEING REPLACED ONCE (PADS AND ROTORS REPLACED BY DEALERSHIP) 3. THE ROTORS AND PADS HAVE BEEN REPLACED ONCE, BUT IT'S HAPPENING AGAIN. *TR

THE REAR BRAKES OF MY 2009 CHEVROLET COBALT SS ARE WORN DOWN THE METAL AFTER APPROX. 15 000KM. THE INSIDE PADS WAS METAL ON METAL, AND THE OUT SIDE PADS WERE FOUND TO BE STILL 80%. ALL PARTS ARE BEING COVERED UNDER WARRANTY, BUT MANY PEOPLE HAVE HAD THE SAME PROBLEM AFTER ALL PARTS WERE REPLACED. REAR BRAKE PADS AND ROTORS ARE BEING REPLACED. *TR

REAR BRAKES HAVE BEEN DEVELOPING GROOVES BEING CUT INTO THE ROTORS. MAKES METAL SCRAPING/RUBBING/SCREECHING NOISE DURING BRAKING. *TR

REAR BRAKES WEAR OUT TOO QUICKLY, HORRIBLE SCORING ON THE ROTORS. NOISE ISSUES. *TR

REASON FOR INSPECTION WAS DUE TO REAR BRAKE GRINDING SOUNDS. AFTER 12,000 MILES THE REAR BRAKE PADS WERE COMPLETELY GONE, AND THE REAR ROTORS SEVERELY GROOVED AND WARPED. GM AGREED THAT THERE WAS A PROBLEM AND REPLACED THE PADS AND ROTORS UNDER WARRANTY STATING THAT THEY'VE SEEN IT ON 3 OTHERS AND WERE TAKING THE SAME ACTION. *TR

REAR BRAKES WEAR VERY FAST AND UNEVENLY, THUS DESTROYING ROTORS. PRODUCES LOUD SQUEALING AND REDUCED BREAKING ABILITY. PARTS ARE NOT AVAILABLE FROM CHEVY AND THIS IS A KNOWN PROBLEM WITHIN THE COBALT COMMUNITY. *TR

THE REAR BRAKES ON THE 2008-9 COBALT SS ARE CAUSING ROTOR SCORING AT 400+ MILES. THE PADS ARE TOO AGGRESSIVE OR THE ROTORS ARE TOO SOFT AND THE ROTORS ARE BEING DESTROYED WHICH COULD LEAD TO BRAKE FAILURE IF NOT REPLACED. *TR