2012 Hyundai Sonata Hybrid: brake failure

Filed Nov 6, 2018 · Brakes, Electrical · 90,132 miles · CA

Was backing out of the driveway and the check brake warning started going off. The brake pedal went to the floor. The whole system of the car shut down. My hydraulic unit failed and they will not cover it under warranty. Thank god I wasn't driving when this happened.

Filed May 27, 2014 · Brakes · 62,085 miles · FL

When the car was started a beeping alarm sounded with a warning stating that there was a brake failure. Yellow triangle with black exclamation point also warning me not to drive. Brakes had severe grinding when trying to move. This is the second time that this has happened to the car. First time was approximately a year ago. I was originally told then that there may have been a hydraulic problem but then told that it was a bad connection somewhere. Waited approximately 15 minutes and car starts with out a problem. My fear is that the brakes will lock or fail while I'm driving on the highway.

Filed Apr 24, 2014 · Brakes · 6,700 miles · IL

I was driving at about 55 MPH on the expressway with the cruise control engaged. Suddenly there was a loud dinning and the panel on the dash flashed "hybrid safety warning", "brake failure". The care would not accelerate. I was able to pull over onto the shoulder. The car would not go over 5 MPH. I pulled off of the expressway as best I could. I then shut the engine down. I restarted the engine and the warning was gone. I took side roads home, but the warning did not return. The total failure of engine power was a very dangerous situation. I took the car in to the dealer on 4/21/14. They have not returned it to me. As of today 4/24/14.

Filed Apr 15, 2014 · Brakes · 22,392 miles · CA

Similar to the federal safety agency id number: 10546231 - "check brakes" ...2012 hyundai sonata hybrid will not start or move (aug 2013). From parked position, turned on vehicle (stepped on brake and depressed electronic ignition). Loud chimes occurred with message "check brakes". No brakes were on, car would not move forward/reverse. Connected to bluelink who could detect "alert". Car towed to dealer. Dealer saw code c1604 in computer log but by then car was able to start, could not duplicate problem. Dealer contacted hyundai tech line, entered case and "repaired" by performing multi-ecv updates version #2 per tsb#13fl004; recalibrated rwolver and ec pressure. It's now 8-months later (apr 2014) and the exact same problem is occurring again.

Filed Apr 15, 2014 · Brakes · 31,990 miles · CA

Similar to the federal safety agency id numbers: 10546231 & 10582880 - "check brakes" ...2012 hyundai sonata hybrid will not start or move (apr 2014). From parked position, turned on vehicle (stepped on brake and depressed electronic ignition). Loud chimes occurred with message "check brakes". No brakes were on, car would not move forward/reverse. Car towed to dealer..dealer said it may take a few days to a week until "hybrid" expert can diagnos due to other hybrid's awaiting service! Same "check brake" issue occurred 8-months ago (aug 2013) and was "repaired" with service software update.

Filed May 30, 2013 · Brakes · 8,000 miles · NM · crash

Proceeded to back out of parking space. Brakes began making loud grinding noise. Pulled back into parking space when brakes failed. Brake failure light and chime was activated. Vehicle would not stop and hit the concrete handicap sign stopping the car. Previously had problem with navigation unit which was replaced once and ready for second replacement. Told service manager we thought it may be electrical related, not defective units. Believe the problem with navigation unit is related to the brake failure. After accident, hyundai had automotive engineering consultants examine car. Hyundai said there was nothing wrong. However, service manager at dealer said the car had main hydraulic failure and new part was ordered. If nothing was wrong, why was hydraulic unit replaced. Hyundai refused to do anything.

Filed Feb 7, 2013 · Brakes · 1,300 miles · IL

Tl* the contact owns a 2012 hyundai sonata hybrid. The contact stated that while driving 10 MPH, the hybrid brake system failed warning lamp illuminated and when he attempted to engage the brakes, the pedal went all the way to the floor. The vehicle was taken to the dealer. The manufacturer was made aware of the failure but did not offer any assistance. The vehicle was not repaired. The failure and current mileage was 1,300...updated 03-13-13 *bf the dealer was able to pulled a brake booster code, but since the code was no longer active, no repairs were made.