2013 Kia Optima Brakes Problems

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 generation, as evidenced by Safety Recall SC284 (NHTSA Campaign 23V652000) for HECU internal electrical shorts and engine fire risks. However, dealerships are treating related sensor failures inside the exact same HECU assembly (such as the internal primary pressure sensor) as customer-pay maintenance issues, rather than recognizing them as symptoms of a fundamentally defective or failing control unit. Dealership service centers are recommending piecemeal, expensive part replacements (like pedal travel sensors) that do not resolve the underlying safety risk of an internally failing HECU module.I request that the NHTSA investigate whether internal pressure sensor failures (Code C1237) and related electronic brake module collapses on 2011–2015 Kia Hybrid models are connected to the known sub-component defects wi

NHTSA ID

11752403

Incident

Jul 2, 2026

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 come on and he didn't want to do the diagnostic because the lights weren't on. Kirby Kia of Ventura service department are crooks and only want to assist you if they get money out of you. My car still has the same issue, possibly damage to the HECU from the recall, but Kirby Kia didn't want to run the diagnostic on my car to find out if it was damaged. Kirby Kia of Ventura is a horrible organization and I will never purchase another Kia vehicle for this reason.

NHTSA ID

11730927

Incident

Apr 13, 2026

The contact owned a 2013 Kia Optima. The contact stated that while driving at an undisclosed speed, the front of the vehicle started excessively smoking and caught fire. No warning lights illuminated. The fire was extinguished by the local fire department, and a fire report was filed. A police report was not filed. The contact received notification of NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic). The dealer was not contacted. The vehicle was not diagnosed or repaired. The vehicle was destroyed. The manufacturer was made aware of the failure via customer care support since no representative was reached via the phone line. The approximate failure mileage was 179,000.

NHTSA ID

11729515

Incident

Apr 6, 2026

Mileage

179,000 mi

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 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11725980

Incident

Mar 19, 2026

The contact owns a 2013 Kia Optima. The contact stated that while driving 75 MPH, the vehicle lost motive power. The accelerator pedal was depressed; however, the vehicle eventually stalled on the side of the road. The key, battery, oil, and engine warning lights were illuminated. There was an abnormal ticking sound coming from the vehicle. The contact stated the failure was related to NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic). The vehicle was towed to an independent mechanic, where it was determined that the engine had seized. The engine failed to turn over. The mechanic had previously performed a routine oil change. The vehicle was towed to the local dealer, where it was diagnosed with low voltage. The spark plugs were checked, there were no oil leaks, and the vehicle was diagnosed with catastrophic engine failure. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 111,862.

NHTSA ID

11723905

Incident

Mar 10, 2026

Mileage

111,862 mi

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.

NHTSA ID

11723147

Incident

Mar 5, 2026

The contact owned a 2013 Kia Optima. The contact stated that while driving the vehicle, the contact became aware of black smoke coming from the floorboard with a burning plastic odor, and the battery warning light illuminated. The contact called her husband and was informed to exit the vehicle. The contact exited the vehicle and seconds later the vehicle exploded. The front of the vehicle blew up onto the windshield and the steering wheel detached and struck the driver’s side seat. The fire was extinguished by the Fulton County Fire Department. A Fire Report and Police Report were filed; however, the reports were not yet provided to the vehicle owner. The contact experienced severe emotional distress. The contact stated due to the emotional distress of the fire, she suffered a miscarriage from the stress and had scratches from having to jump out of the window. There was no medical assistance sought. Several personal items inside the vehicle were also lost due to the fire and additionally, the contact lost employment due to the fire. The VIN was included in NHTSA Campaign Number: 23V652000 (SERVICE BRAKES, HYDRAULIC); however, the vehicle had not been repaired prior to the fire. The vehicle was towed to a tow yard then to a Kia dealer. The vehicle was destroyed. The manufacturer was notified of the failure. The failure mileage was 193,876.

NHTSA ID

11719465

Incident

Oct 12, 2024

Mileage

193,876 mi

The contact owned a 2013 Kia Optima. The contact stated that while his niece was driving the vehicle at 65 MPH, a strong fuel odor began to emit from the vehicle without warning. The vehicle then began to violently shake as the contact's niece began to exit the highway. Upon pulling over and exiting the vehicle, black smoke began to emit from the vehicle as both police and fire officials were in the vehicle's vicinity and witnessed the fire. As the vehicle quickly became engulfed in flames, the fire department quickly arrived at the scene and extinguished the fire. No injuries were reported, and a police report was filed. The vehicle was towed to the niece's home, where it remained in her possession. Upon investigation, the contact discovered that the vehicle was included in NHTSA Campaign Number: 23V652000(Service Brakes, Hydraulics). The manufacturer was notified of the failure, and an investigator was scheduled to visit the niece's home and inspect the vehicle; the investigator never arrived, and the vehicle had yet to be inspected. The vehicle was destroyed as a result of the fire. The failure mileage was approximately 160,000.

NHTSA ID

11716694

Incident

Jan 6, 2026

Mileage

160,000 mi

The contact owns a 2013 Kia Optima. The contact stated that while driving 70 MPH, the speedometer started malfunctioning, and the check engine warning light was flashing. There was an abnormal burning odor, and there was smoke coming from under the hood. The contact pulled over to the side of the road and allowed the vehicle to cool down for an hour. While attempting to restart the vehicle, several unknown warning lights were flashing, and the vehicle failed to restart. The contact was picked up by her daughter, and the vehicle was later towed to the dealer to be diagnosed. The dealer later informed the contact that the warning lights had turned off. Additionally, the dealer informed the contact that the tires, the oil, and the oil filter needed to be replaced. The contact declined to pay for the parts replacement because the oil and the oil filter had been replaced two weeks prior to the failure. The dealer informed the contact that the vehicle was ready for pick up. The contact stated that after a family member picked up the vehicle, the failure recurred while driving, and the vehicle stalled. The driver was able to pull into a parking lot. The contact stated that the dealer had informed them that an arrangement had been made for the vehicle to be towed to their location; however, no further update was provided. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic). The manufacturer was not notified of the failure. The failure mileage was approximately 300,000.

NHTSA ID

11710466

Incident

Dec 20, 2025

Mileage

300,000 mi

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 is no recall that is showing up. I said I need to look over this because I saw a recall there. I verified this and messaged the advisor back. There were no further conversation conversations over the phone. Everything was done over messages and you can see them below. I was being threatened to be charged storage fees. And they said that they performed the recall, but the car was not confirmed to be in drivable condition. I did not go by to pick the car up. I called corporate numerous times. I was told on one day any additional information from text messages is not needed. Until Alicia gave me the email and said to please send over the info. I called the corporate office, the corporate office did not do anything to solve the situation. My car is still not drivable condition. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S

NHTSA ID

11698245

Incident

Oct 22, 2025

The contact owns a 2013 Kia Optima. The contact stated that while driving approximately 65 MPH, there was a burning odor inside the vehicle before the vehicle stalled. The vehicle was later towed to the local dealer who diagnosed the vehicle with engine seizure. The contact was informed that the engine needed to be replaced. The vehicle was not yet repaired. The contact was informed of the NHTSA Campaign Number: 23V652000 (SERVICE BRAKES, HYDRAULIC), but due to the vehicle having a branded title, the recall repair was not performed. The failure mileage was 119,000.

NHTSA ID

11680824

Incident

Nov 8, 2024

Mileage

119,000 mi

The contact owns a 2013 Kia Optima. The contact stated that after having the vehicle for a month, while driving approximately 30-40 MPH on a residential street, there was an abnormal knocking sound coming from the vehicle and the vehicle went into LIMP Mode. The vehicle failed to accelerate above 35 MPH and stalled. There were no warning lights illuminated. The contact stated that the vehicle had a Salvaged Title but should still be covered under NHTSA Campaign Number: 23V652000 (Service Brakes, Hydraulic). The vehicle was towed to the local dealer, where it was diagnosed with engine rod bearing failure. The vehicle was not repaired. The manufacturer was contacted regarding the failure. The approximate failure mileage was 137,000.

NHTSA ID

11679028

Incident

Jul 2, 2025

Mileage

137,000 mi

My Kia has the part number that was recalled for the ABS module. But Kia said it’s not included in the recall because of my vin. Appeared 2 months ago. All lights on & potential risk of fire according to the brake fluid leaking. So I have to park outside. Kia inspected & said it was ABS module that needed replacement. For $2,600. Which I can’t afford. I Have already spent $500 for the other problems they said it was at first. But it didn’t fix the problem. Now I am having to borrow cars to get to work.

NHTSA ID

11669132

Incident

May 2, 2025

Car cuts off while driving almost causing a accident. The brakes randomly stop working while driving also. The code says P1777 relating to the transmission/ hybrid system. Kia dealerships are charging customers to diagnosis their vehicles. Eventhough they already know this is a common problem with the hybrid cars. Also the 12v battery and hybrid battery needs to be replaced every 2 years, which is costly. The tech also advised that Hybrids are the worst cars and I should sale my car. This is unfair to customers and a waste of money. Please make this a recall and extend all warranties past 150k. This is a huge safety problem and could cause deaths in the future.

NHTSA ID

11658778

Incident

Jan 13, 2025

The contact owns a 2013 Kia Optima. The contact stated that while a friend was attempting to start the vehicle, the vehicle failed to start. There was no warning light illuminated. The vehicle was towed to a local dealer, where the vehicle was diagnosed, and the contact was informed that the engine had failed and needed to be replaced. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 23V652000 (SERVICE BRAKES, HYDRAULIC); as the probable cause for the failure. The manufacturer was notified of the failure. The approximate failure mileage was 67,999.

NHTSA ID

11658416

Incident

Mar 31, 2025

Mileage

67,999 mi

The contact owned a 2013 Kia Optima. The contact stated that after parking her vehicle in her driveway when the vehicle had caught on fire 2 hours later. The vehicle was unoccupied during the fire. The origin of the fire was unknown. The location of the fire was underneath the front driver's side tire, shortly after the vehicle was engulfed in flames, and due to the proximity of the vehicle to the contact's residence, this caused siding on the side of her house to also catch on fire. The fire department arrived and extinguished the fire. A fire department report was filed. A police department report was filed. The vehicle was destroyed. No injuries were reported. The local dealer was not contacted. The contact referenced NHTSA Campaign Number: 21V331000 (SERVICE BRAKES, HYDRAULIC) as probable cause for the failure. The manufacturer was notified of the failure. The approximate failure mileage was 116,000.

NHTSA ID

11657588

Incident

Apr 19, 2025

Mileage

116,000 mi

Yesterday [XXX] as I was driving with my wife present, suddenly warning popped up: Stop the car, hybrid break system safety, not safe to drive, or something close to that, I don't recall exact words. The car started to sputter , the brake pedal lost power meaning no brake, I quickly looked at the rear view mirror, luckily there was no car coming up close to me, the car lost speed and I slowly drove into an almost vacant parking lot across Lowe's, turned the engine off. Waited 30 minutes and start the car and the issue was gone. The same thing happened almost a month ago but that time the car was parked and hybrid brake system safety popped up as I tried to start the car and went away after 45 minutes of the engine being off. Had yesterday's episode happened while I was driving on the highway two weeks ago to visit my grandsons in Fontana, I would have surly killed in an horrific accident. My vehicle is Optima Hybrid. Thank you. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11657393

Incident

Apr 27, 2025

I am a owner of the Kia Optima 2013 and wish to fill a complaint with the dealership Luther Kia of Inver Grove for refusing to complete/resolve the safety recall of NHTSA #23V652. I attempted several times but was told by the staff, the remote start on my vehicle need to be removed and replaced in order for them to complete the safety recall. It would cost 200.00 to take it off and then, another 200.00 to reinstall it at the cost of myself. This seems like an unreasonable high cost to make sure my car is safe. I don't think is fair or right. This is a inconvenience for me! Please help!

NHTSA ID

11644816

Incident

Feb 13, 2025

The contact owns a 2013 Kia Optima. The contact received notification of NHTSA Campaign Number: 23V652000 (SERVICE BRAKES, HYDRAULIC); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ID

11644793

Incident

Oct 15, 2023

The contact owns a 2013 Kia Optima. The contact received notification of NHTSA Campaign Number: 23V652000 (SERVICE BRAKES, HYDRAULIC). The contact stated while driving 15 MPH, the brake pedal was depressed; however, the vehicle failed to respond as needed. There were no warning lights illuminated. The contact then tried to merge into the Wal-Mart parking lot with the assistance of a police officer. An independent mechanic arrived at Wal-Mart where the vehicle was parked to diagnose the vehicle. The vehicle was diagnosed with starter failure. The vehicle was then towed to the dealer where it was diagnosed with engine failure. The vehicle was not repaired because the manufacturer informed the contact that the vehicle had not been repaired under the other 7 recalls associated with the VIN. The manufacturer was made aware of the failure. The failure mileage was approximately 120,000. Parts distribution disconnect.

NHTSA ID

11644211

Incident

Feb 15, 2025

Mileage

120,000 mi

Was driving home and the brake light came on and dash said to pull over brakes started to grind as I pressed on them took it in and couldn’t find the problem looked online and a lot of people with my car are having the same problem read that there was a recall for the brake module 21V331000.

NHTSA ID

11636179

Incident

Jan 15, 2025

The contact owned a 2013 Kia Optima. The contact stated while his husband was driving approximately 70 MPH and depressing the accelerator pedal, the vehicle failed to respond. The check engine warning light was illuminated. The contact stated that as the driver was pulling to the side of the road, several unknown warning lights were illuminated. Additionally, the contact stated that several drivers alerted the driver that the vehicle was on fire, and the driver immediately exited the vehicle. The contact stated that upon opening the hood, the driver saw flames, and the front end of the vehicle became engulfed in fire. The contact stated that the front end of the vehicle burned to the ground, and the front doors and the front windows sustained fire damage. The fire was extinguished by the fire department. The contact was unsure whether a fire department report was filed. A police report was filed. The contact's husband did not sustain injuries. The vehicle was towed to a tow lot, where it was totaled. The contact became aware that the VIN was included in NHTSA Campaign Numbers: 20V100000(Fuel System, Gasoline) and 23V652000(Service Brakes, Hydraulic), which the contact related to the failure. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 130,000.

NHTSA ID

11628600

Incident

Nov 25, 2024

Mileage

130,000 mi

The contact owns a 2013 Kia Optima. The contact received notification of NHTSA Campaign Number: 23V652000 (SERVICE BRAKES, HYDRAULIC); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ID

11617287

Incident

Aug 1, 2024

In May 2024, I took my 2013 Kia Optima (2.0L T-GDI) to my local dealership to have several recalls completed, including SC284QF (Hydraulic Electronic Control Unit). The dealership completed the recalls and I have a receipt showing all three recalls were completed. On Sep 12 2024 I received a recall notice stating the recall SC284QF had NOT been completed and to contact my dealership to schedule this recall repair. I looked up the Kia Safety Recall Campain instruction, detailing the repair step-by-step. I then went to my vehicle fuse panel (where the recall repair was to be performed) and was able to verify the recall has NOT been completed, despite the Kia dealership claiming (and documenting) the recall as being complete. This recall states that the risk of not competing this recall is potential engine fire while being driven or parked. I park this vehicle inside my garage (attached to my house) and this could have caused a fire which could have endangered the lives of my family. I have attached the Kia Safety Recall Campain instructions as well as a photo of the affected fuse.

NHTSA ID

11614687

Incident

May 17, 2024

The contact owned a 2013 Kia Optima. The contact stated that after parking in the garage and turning the vehicle off, approximately six hours later it was discovered that a fire had started in the garage area and had begun to spread inside the townhome. The fire department was called to the scene and extinguished the flames. During the fire, the vehicle was destroyed and later towed away. Also, a second vehicle parked inside the garage was destroyed and a third vehicle parked outside in the driveway sustained fire damage. The garage was destroyed and the townhome sustained significant fire damage. A fire report was taken at the scene but the cause of the fire was not determined. The contact later received a recall notice for the NHTSA Campaign Number: 23V652000(Service Brakes, Hydraulic). The contact indicated that the vehicle had experienced that same failure listed in the recall. The failure mileage was 170,000.

NHTSA ID

11611362

Incident

Jul 29, 2023

Mileage

170,000 mi