IllustrationBRAKES ON A 2009 AND 2008 CHEVY COBALT SS TURBOCHARGED. FAILING PREMATURELY. I HAVE 7500 MILES AND ALREADY HAVE SCORED, FADING BRAKE PERFORMANCE, FRONT AND REAR. *TR
2009 Chevrolet Cobalt Ss
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all Cobalt Ss years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
1330–25K
2325–50K
950–75K
675–100K
2100–150K
1150K+
174 reports with mileage · 16 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes, Hydraulic. Review the 133 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Parking Brake. Review the 18 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 13 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
8 crash reports2 fire reports3 injury reports
Service Brakes, Hydraulic complaints
133 reportsREAR 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 A…
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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 …
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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 CA…
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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
2009 CHEVY COBALT SEDAN REAR BRAKES SCORED(DEEP GROVES) AFTER 300 MILES. *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 …
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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 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. *T…
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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
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
2PE20011 · Fuel Line Leak
Opened Jul 5, 2020 · Closed Aug 17, 2023
Status: closed (inferred from source dates) · Fuel System, Gasoline; Fuel System, Other:delivery:hoses, Lines/piping, And Fittings; Fuel/propulsion System
On July 5, 2020, the Office of Defects Investigations (ODI) opened PE20-011 to investigate instances of metal fuel lines under the vehicle corroding and leaking fuel in model year (MY) 2008 through 2010 Chevrolet Cobalt and 2008 through 2009 Chevrolet HHR passenger cars manufactured by General Motors (GM). The metal fuel lines are corroding and leaking fuel in the area between the front and rear wheels on the driver's side of the vehicle before the muffler. Most consumers allege a fuel odor and/or an observable fuel leak that alerts them to the condition.The subject metal fuel lines have a protective AGE coating and, in the vicinity of the left rear wheel, are further wrapped in a foil heat shield. The AGE coating consists of an annealed zinc aluminum alloy metal coating with extended corrosion protection paint. Under certain conditions, water and corrosive road deicing agents may enter a crevice between the heat shield and the AGE coating. With extended environmental exposure in high corrosive environments, the AGE coating can degrade. If it degrades enough, the base metal lines may begin to corrode beneath the heat shield.Corrosion to the fuel lines may eventually cause a perforation to develop in the line, allowing fuel vapors to escape from between the line and the heat shield, emitting a fuel odor that will be detectable to the vehicle operator. If the corrosion progresses, fuel may begin to weep from the line. Further metal degradation due to corrosion could create a drip or a mist of fuel. If this occurs, vehicle owners may see drips, spots, or puddles on the ground near the rear portion of the vehicle, primarily along the driver's side rear wheel.The majority of allegations (85%) were reported for vehicles that are operated in the salt belt region of the United States. This area includes states in the Northeast, mid-Atlantic, and Midwest regions. Additionally, the average failure mileage in the subject vehicles is approximately 111,000 across all data sources.Considering the low manufacturer complaint/warranty rates of fuel line replacement, the fact that the majority of failures are concentrated in salt belt states, high failure mileages, as well as the field exposure time for the subject vehicles, and the highly detectable and progressive nature of this failure over time, the potential safety consequences of this issue are very low. To date, there have been no reported crashes, injuries, or fatalities related to this issue. There are two reported fires in ODI data and no reported fires in GM data. Both ODI reported fires were minor, occurred after the vehicle was parked, and were extinguished utilizing fire extinguishers.In view of the progressive failure occurring at high mileages, the age of the subject vehicles, the high detectability of the leak, and the majority of failures occurred in salt belt states, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances.Review the ODI reports cited above at nhtsa.gov under the attached identification numbers.
Additional source detail variants (3)
Fuel/propulsion System
On July 5, 2020, the Office of Defects Investigations (ODI) opened PE20-011 to investigate instances of metal fuel lines under the vehicle corroding and leaking fuel in model year (MY) 2008 through 2010 Chevrolet Cobalt and 2008 through 2009 Chevrolet HHR passenger cars manufactured by General Motors (GM). The metal fuel lines are corroding and leaking fuel in the area between the front and rear wheels on the driver's side of the vehicle before the muffler. Most consumers allege a fuel odor and/or an observable fuel leak that alerts them to the condition.The subject metal fuel lines have a protective AGE coating and, in the vicinity of the left rear wheel, are further wrapped in a foil heat shield. The AGE coating consists of an annealed zinc aluminum alloy metal coating with extended corrosion protection paint. Under certain conditions, water and corrosive road deicing agents may enter a crevice between the heat shield and the AGE coating. With extended environmental exposure in high corrosive environments, the AGE coating can degrade. If it degrades enough, the base metal lines may begin to corrode beneath the heat shield.Corrosion to the fuel lines may eventually cause a perforation to develop in the line, allowing fuel vapors to escape from between the line and the heat shield, emitting a fuel odor that will be detectable to the vehicle operator. If the corrosion progresses, fuel may begin to weep from the line. Further metal degradation due to corrosion could create a drip or a mist of fuel. If this occurs, vehicle owners may see drips, spots, or puddles on the ground near the rear portion of the vehicle, primarily along the driver's side rear wheel.The majority of allegations (85%) were reported for vehicles that are operated in the salt belt region of the United States. This area includes states in the Northeast, mid-Atlantic, and Midwest regions. Additionally, the average failure mileage in the subject vehicles is approximately 111,000 across all data sources.Considering the low manufacturer complaint/warranty rates of fuel line replacement, the fact that the majority of failures are concentrated in salt belt states, high failure mileages, as well as the field exposure time for the subject vehicles, and the highly detectable and progressive nature of this failure over time, the potential safety consequences of this issue are very low. To date, there have been no reported crashes, injuries, or fatalities related to this issue. There are two reported fires in ODI data and no reported fires in GM data. Both ODI reported fires were minor, occurred after the vehicle was parked, and were extinguished utilizing fire extinguishers.In view of the progressive failure occurring at high mileages, the age of the subject vehicles, the high detectability of the leak, and the majority of failures occurred in salt belt states, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances.Review the ODI reports cited above at nhtsa.gov under the attached identification numbers.
Fuel System, Gasoline
On July 5, 2020, the Office of Defects Investigations (ODI) opened PE20-011 to investigate instances of metal fuel lines under the vehicle corroding and leaking fuel in model year (MY) 2008 through 2010 Chevrolet Cobalt and 2008 through 2009 Chevrolet HHR passenger cars manufactured by General Motors (GM). The metal fuel lines are corroding and leaking fuel in the area between the front and rear wheels on the driver's side of the vehicle before the muffler. Most consumers allege a fuel odor and/or an observable fuel leak that alerts them to the condition.The subject metal fuel lines have a protective AGE coating and, in the vicinity of the left rear wheel, are further wrapped in a foil heat shield. The AGE coating consists of an annealed zinc aluminum alloy metal coating with extended corrosion protection paint. Under certain conditions, water and corrosive road deicing agents may enter a crevice between the heat shield and the AGE coating. With extended environmental exposure in high corrosive environments, the AGE coating can degrade. If it degrades enough, the base metal lines may begin to corrode beneath the heat shield.Corrosion to the fuel lines may eventually cause a perforation to develop in the line, allowing fuel vapors to escape from between the line and the heat shield, emitting a fuel odor that will be detectable to the vehicle operator. If the corrosion progresses, fuel may begin to weep from the line. Further metal degradation due to corrosion could create a drip or a mist of fuel. If this occurs, vehicle owners may see drips, spots, or puddles on the ground near the rear portion of the vehicle, primarily along the driver's side rear wheel.The majority of allegations (85%) were reported for vehicles that are operated in the salt belt region of the United States. This area includes states in the Northeast, mid-Atlantic, and Midwest regions. Additionally, the average failure mileage in the subject vehicles is approximately 111,000 across all data sources.Considering the low manufacturer complaint/warranty rates of fuel line replacement, the fact that the majority of failures are concentrated in salt belt states, high failure mileages, as well as the field exposure time for the subject vehicles, and the highly detectable and progressive nature of this failure over time, the potential safety consequences of this issue are very low. To date, there have been no reported crashes, injuries, or fatalities related to this issue. There are two reported fires in ODI data and no reported fires in GM data. Both ODI reported fires were minor, occurred after the vehicle was parked, and were extinguished utilizing fire extinguishers.In view of the progressive failure occurring at high mileages, the age of the subject vehicles, the high detectability of the leak, and the majority of failures occurred in salt belt states, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances.Review the ODI reports cited above at nhtsa.gov under the attached identification numbers.
Fuel System, Other:delivery:hoses, Lines/piping, And Fittings
On July 5, 2020, the Office of Defects Investigations (ODI) opened PE20-011 to investigate instances of metal fuel lines under the vehicle corroding and leaking fuel in model year (MY) 2008 through 2010 Chevrolet Cobalt and 2008 through 2009 Chevrolet HHR passenger cars manufactured by General Motors (GM). The metal fuel lines are corroding and leaking fuel in the area between the front and rear wheels on the driver's side of the vehicle before the muffler. Most consumers allege a fuel odor and/or an observable fuel leak that alerts them to the condition.The subject metal fuel lines have a protective AGE coating and, in the vicinity of the left rear wheel, are further wrapped in a foil heat shield. The AGE coating consists of an annealed zinc aluminum alloy metal coating with extended corrosion protection paint. Under certain conditions, water and corrosive road deicing agents may enter a crevice between the heat shield and the AGE coating. With extended environmental exposure in high corrosive environments, the AGE coating can degrade. If it degrades enough, the base metal lines may begin to corrode beneath the heat shield.Corrosion to the fuel lines may eventually cause a perforation to develop in the line, allowing fuel vapors to escape from between the line and the heat shield, emitting a fuel odor that will be detectable to the vehicle operator. If the corrosion progresses, fuel may begin to weep from the line. Further metal degradation due to corrosion could create a drip or a mist of fuel. If this occurs, vehicle owners may see drips, spots, or puddles on the ground near the rear portion of the vehicle, primarily along the driver's side rear wheel.The majority of allegations (85%) were reported for vehicles that are operated in the salt belt region of the United States. This area includes states in the Northeast, mid-Atlantic, and Midwest regions. Additionally, the average failure mileage in the subject vehicles is approximately 111,000 across all data sources.Considering the low manufacturer complaint/warranty rates of fuel line replacement, the fact that the majority of failures are concentrated in salt belt states, high failure mileages, as well as the field exposure time for the subject vehicles, and the highly detectable and progressive nature of this failure over time, the potential safety consequences of this issue are very low. To date, there have been no reported crashes, injuries, or fatalities related to this issue. There are two reported fires in ODI data and no reported fires in GM data. Both ODI reported fires were minor, occurred after the vehicle was parked, and were extinguished utilizing fire extinguishers.In view of the progressive failure occurring at high mileages, the age of the subject vehicles, the high detectability of the leak, and the majority of failures occurred in salt belt states, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances.Review the ODI reports cited above at nhtsa.gov under the attached identification numbers.
PE10005 · Electric Power Steering Failure
Opened Jan 27, 2010 · Closed Jul 19, 2010
Status: closed (inferred from source dates) · Steering:electric Power Assist System
In a March 1, 2010 letter, General Motors Corporation (GM) provided a defect information report to NHTSA regarding a problem that could result in sudden loss of power steering assist in certain model year (MY) 2005 through 2010 Chevrolet Cobalt and MY 2007 through 2010 Pontiac G5 vehicles equipped with electric power steering (EPS).The letter indicates that the loss of steering assist could occur at any time while driving and that, once assist is lost, a message is displayed on the Driver Information Center (DIC) and a chime sounds to inform the driver.The letter further states that steering control is maintained in manual mode, but would require greater driver effort at low vehicle speeds.In the next ignition cycle, power assist is typically regained and the DIC message is no longer displayed.GM's letter identifies the root cause of the EPS failure as the EPS motor and indicates that production of a new motor started in December 2009.GM's recall repair procedure instructs dealers to replace the EPS motor in all recalled vehicles. ODI's analysis of all information available related to sudden loss of EPS assist while driving in the MY 2005 through 2009 Chevrolet Cobalt vehicles shows current complaint and warranty rates of 323/100,000 vehicles and 0.4% respectively.In response to ODI's request for information, GM identified 81 complaints where a crash was claimed that may be related to loss of EPS assist.ODI's analysis of all crash claims was based on verifiable factors such as; whether a loss of EPS was indicated at the time of the crash by a chime or malfunction indicator lamp or if a EPS related component malfunction was identified after the crash occurred.With this method ODI identified 36 possible crashes related to EPS failure.GM assessed crash claims based on the available facts and excluded crash claims that indicated that the vehicle was travelling at speeds in the range of 30 mph or greater.GM said that it believes if power assist is lost while a vehicle is moving at speeds in the range of 30 mph or greater there is a small difference in steering efforts perceived in subjective evaluations at those speeds and it is unlikely to lead to loss of vehicle control. Based on GM's safety recall, this investigation is closed.