There are 7 stored owner reports matching the powertrain & transmission leading-label group for the 2012 Toyota Corolla in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 7 of 7 matching reports.
Open the full vehicle complaint log (all categories)CORROSION TO THE AUTOMATIC TRANSMISSION OIL COOLER HOSE OCCURRED IN THE METAL PIPE PORTION OF THE COOLER LINE, SPECIFICALLY THE TOP LINE, (NOT SURE IF THAT'S 'IN' OR 'OUT') CAUSING A LEAK IN ATF. NOT ONLY THAT, BUT CORROSION TO BOTH BOLTS THAT HOLD THIS LINE IN PLACE AND CAUSED THE BOLTS TO SNAP WHEN TRYING TO REPLACE THIS LINE.
POWER CONTROL VALVE GETS STUCK CLOSED CHECK ENGINE LIGHT AND TRACK LIGHT COMES ON THIS HAS BEEN A PROBLEM WHEN I GOT THE CALL NEW IT HAS 30 TIMES T CANT USE MY CRUZ CONTROL AFTER 50 MILES IT IS RESET ITSELF ALL GOES BACK TO NORMAL OR I PUT A SCAN TOOL ON AND RESET IT
2012 TOYOTA COROLLA. CONSUMER WRITES IN REGARDS TO TRANSMISSION AND VEHICLE ACCELERATION PROBLEMS. *SMD *CN
SUDDEN UNINTENDED ACCELERATION FROM STOP. PUT CAR IN DRIVE AFTER BACKING OUT AND IT SHOT FORWARD ABOUT 25' INTO A TREE. MAJOR DAMAGE TO CAR. NO INJURIES. *TR
WHILE WAITING FOR THE TRAFFIC LIGHT TO CHANGE AND MY FOOT ON THE BRAKES, THE CAR SUDDENLY ACCELERATED AND DESPITE SHIFTING TO PARK AND PULLING ON THE EMERGENCY BRAKE THE CAR CONTINUED TO REV VERY HIGH FOR SEVERAL MINUTES. JUST PRIOR TO ACCELERATION, THE CAR'S BRAKES BECAME VERY SOFT AND SUNK ALL THE WAY TO THE FLOOR OF THE CAR AS IF SOMEONE HAD DEPRESSED THE POWER IN THE BRAKE LINE. I TURNED OFF THE ENGINE AND WAITED FOR ABOUT 2 MINUTES AND RESTARTED THE CAR. THE ENGINE RACED AGAIN AT VERY HIGH SPEEDS WITH THE EMERGENCY BRAKE ON AND THE CAR SET AT "PARK." I TURNED THE CAR OFF AGAIN AND WAITED FIVE MINUTES. THE CAR STARTED NORMALLY AND I THEN CALLED MY WIFE TO PICK ME UP. SHE DROVE THE CAR BACK HOME AND NOTICED THE BRAKES WERE VERY MUSHY AND SHE FELT A SLIGHT ACCELERATION. WE TOOK IT TO OUR TOYOTA DEALERSHIP SINCE IT WAS STILL UNDER WARRANTY AND THEY FOUND NOTHING WRONG WITH THE CAR AND ASSERTED THAT I DEPRESSED BOTH THE BRAKE AND THE GAS PEDAL AT THE SAME TIME, WHICH IS UTTERLY RIDICULOUS. WE HAVE OWNED THE CAR FOR 18 MONTHS AND NOTHING LIKE THIS HAS EVER HAPPENED. THERE WERE MORE THAN FIVE WITNESSES TO THIS AS I HAD BLOCKED TRAFFIC AT THE LIGHT'S INTERSECTION WHILE OTHER CARS WENT AROUND ME WHILE THE CAR WAS RACING. I HAVE FILED AN INCIDENT REPORT WITH TOYOTA BUT IT DOES NOT LOOK AS IF ANYTHING WILL BE DONE WITH THE UNINTENDED ACCELERATION ISSUE. I AM A FORMER LAWYER AND I TAKE MY COMPLAINTS VERY SERIOUSLY. PLEASE HELP. *TR
TL* THE CONTACT OWNS A 2012 TOYOTA COROLLA. THE CONTACT STATED WHEN SHE TRIED TO DRIVE IN REVERSE, THE PARKING GEAR FAILED. THE VEHICLE WAS NOT TAKEN TO AN DEALER FOR DIAGNOSTIC TESTING BECAUSE SHE WAS UNABLE DRIVE THE VEHICLE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VIN WAS NOT AVAILABLE. THE APPROXIMATE FAILURE MILEAGE WAS 37,000.
TL* THE CONTACT OWNS A 2012 TOYOTA COROLLA. THE CONTACT STATED THAT WHILE STOPPED AT A STOP LIGHT, HE DEPRESSED THE ACCELERATOR PEDAL BUT THE VEHICLE WOULD NOT ACCELERATE. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS. THE TECHNICIAN WAS UNABLE TO DIAGNOSE THE FAILURE. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 10,000. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: May 4, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.