2013 Kia Optima service brakes problems

“On July 14, 2026, the vehicle's engine was replaced by an authorized dealership under an official Kia recall. On August 16, 2026, while driving on the highway, heavy smoke suddenly began emitting from the engine compartment. When attempting to slow down, the braking system suffered a total loss of power and failed completely. To stop the vehicle, it had to be steered into the highway median to intentionally scrape against it to force a stop. Immediately upon exiting the vehicle, heavy flames were observed under the engine compartment before completely engulfing the front of the car. The fire department extinguished the fire, and the vehicle is a total loss.”

“I am writing to formally report a dangerous safety defect involving the braking system and the Hydraulic Electronic Control Unit (HECU) on my 2013 Kia Optima Hybrid. While operating the vehicle, severe warning lights illuminated on the dashboard indicating an immediate braking system and stability control failure. A diagnostic scan revealed active fault code C1237, pointing specifically to a primary pressure sensor signal failure embedded inside the internal HECU assembly.This issue presents a severe safety hazard. The failure compromises the vehicle's electronic brake assist, anti-lock braking system (ABS), and active stability systems. This results in unpredictable pedal feel and significantly increased stopping distances, drastically elevating the risk of a high-speed collision.Furthermore, this vehicle architecture relies heavily on clean voltage from the 12-volt battery system. Sudden drops in battery performance appear to trigger cascading communication faults within the HECU network, causing the vehicle to lose crucial safety systems without adequate warning.Kia is aware of severe electrical and internal component defects within the HECU modules of this…”

“Brake pedal loses pressure and disengages with brakes. Traction light, maintenance light, hybrid system warning message, check brakes message and parking brake intermittently turns on and off. I called Kirby Kia of Ventura a few weeks ago and let them know about my issue with the car. I explained that I took the car to a mechanic and the diagnostic they did stated the issue with the car could be because of one of the recalls. On 4/10/26 I took my vehicle to Kirby Kia of Ventura for the recalls and asked if they could do the diagnostic. Raul from Kia was the service rep that spoke with me. He stated they would do the recalls and then, if needed, they would perform the diagnostic. Later that day Raul called me and stated the recalls were completed and no issues were found. Several items were found from Kia's point inspection, but none related to the issue at hand. I then asked Raul if they could perform the diagnostic to know what was wrong with my car and he stated that they could do the diagnostic on Monday, 4/13/26. Raul stated he would give me a call around 10 to 11 am, to discuss any issues. Raul called at 10:49 am, and stated no lights on the dashboard have…”

“Vehicle: 2013 Kia Optima SXL VIN: [XXX] While driving on a highway at approximately 55–58 mph, the rear driver-side electronic parking brake (EPB) motor housing failed with a loud bang. Immediately after, there was heavy smoke and a strong burning smell. The vehicle became very difficult to drive, and the wheel began screeching and dragging as if the brake had locked. The failure appears to have caused the rear brake caliper to seize while the vehicle was in motion. This created a dangerous driving situation at highway speed and could have caused a crash. The brake system component that failed appears to be the electronic parking brake actuator/motor assembly attached to the rear caliper. This was a sudden mechanical failure, not normal brake wear, and it occurred while driving at speed. Kia care case number: XXX”

“HECU failure on my 2013 Kia. My specific VIN # is not included in this repair but the year make and model are under recall sc197. My brakes are going all the way floor. There is a leek internally inside the hydraylic electonic control unit which is a fire hazard as well as a hydraulic failure. This is a massive safety and liability concern.”

“While I was driving on this day [XXX] all of a sudden my car started to shut down and I couldn’t give my vehicle any gas really. I got a hybrid system warning, and my red brake light came on, and I got indicator for me to check the brake. My brakes felt like they were grinding and hitting the ground. I managed to get my Kia into the dealership where the service manager, Jose looked at my car briefly. Of a visual inspection he said that the brake pads looked good, but your brakes are hitting the ground. He charged me a diagnosis. I told him to check to see if there are any recalls active, he said I do see a recall, but this doesn’t have anything to do with your car. The next day I heard from the service manager told me I have an update. I have attached the diagnosis of my car. This is what they say needs to be repaired in my vehicle. I asked my service advisor questions about how related the recalled part was to the issue. You can see the conversation in the pictures. At this point, I created a case with you all when he started to argue over terminology. I had a conversation on the phone with Jose and my service advisor later where they then told me that there…”