The contact owns a 2015 Kia Optima. The contact stated that while pulling into the driveway, the ABS warning light remained illuminated after the vehicle was powered off. The contact stated that the parking brake warning light unexpectedly illuminated while the vehicle was being operated. The contact stated that the brake lights illuminated while the vehicle was turned on or off. The contact's son inspected the vehicle and became aware that the rear of the vehicle near the brake pedal was extremely hot and that the area under the hood was extremely hot. The vehicle was taken to the dealer but was not diagnosed. The dealer informed the contact that the failure could be associated with a light switch failure; however, the contact stated that the failure was not related to the light switch and that the vehicle needed to be diagnosed to determine the cause of the failure. The approximate failure mileage was 231,000.
2015 Kia Optima brakes problems
90 complaints (9% of all complaints for this car). Typical mileage when it fails: 90,000. 5 crashes reported.
- owner complaints
- 90
- of this car's complaints
- 9%
- typical mileage
- 90,000
- crashes
- 5
- recalls
- 3
Which part fails
Owners did not name a specific part.
At what mileage
Complaints by mileage at the time of the problem.
Kia Optima brakes problems in other years
Specific symptoms reported on the 2015 Kia Optima brakes
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
Service brakes, hydraulic: antilock/traction control/electronic limited slip: control unit/module
- What is wrong
- Kia America, Inc. (Kia) is recalling certain 2010-2019 Borrego, 2014-2016 Cadenza, 2010-2013 Forte, Forte Koup, Sportage, 2015-2018 K900, 2011-2015 Optima, 2011-2013 Optima Hybrid, Soul, 2012-2017 Rio, 2011-2014 Sorento, and 2010-2011 Rondo vehicles. The Hydraulic Electronic Control Unit (HECU) may experience an electrical short, which can result in an engine compartment fire while parked or driving.
- Risk
- An engine compartment fire while parked or driving can increase the risk of injury.
- Remedy
- Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the HECU fuse, free of charge. Interim notification letters, notifying owners of the safety risk, were mailed November 14, 2023. Owner notification letters were mailed March 29, 2024 through June 18, 2024. Owners may contact Kia customer service at 1‑800‑333‑4542. Kia's number for this recall is SC284.
Recall number 23V652000 · Recall details
Service brakes, hydraulic: antilock/traction control/electronic limited slip: control unit/module
- What is wrong
- Kia Motors America (Kia) is recalling certain 2013-2015 Optima and 2014-2015 Sorento vehicles previously recalled under recall 20V‑519. Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly resulting in an electrical short.
- Risk
- An electrical short in the HECU increases the risk of a fire while parked or driving.
- Remedy
- Owners are advised to park outside and away from other vehicles and structures until the recall repair is completed. Dealers will install a new multi-fuse, and inspect the HECU for leaks, replacing the HECU if necessary, free of charge. Owner notification letters were mailed on July 2, 2021. This recall supersedes previous the federal safety agency recall number 20V‑519. Owners may contact Kia customer service at 1‑800‑333‑4542. Kia's number for this recall is SC212.
Recall number 21V331000 · Recall details
Service brakes, hydraulic: antilock/traction control/electronic limited slip: control unit/module
- What is wrong
- Kia Motors America (Kia) is recalling certain 2013-2015 Optima and 2014-2015 Sorento vehicles. Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly resulting in an electrical short.
- Risk
- If the HECU short circuits, there is an increased risk of an engine compartment fire.
- Remedy
- Kia will notify owners, and dealers will inspect the HECU for leaking brake fluid and replace the HECU if necessary, free of charge. Owners are advised to park outside and away from other vehicles and structures until the recall repair is completed. The recall began October 20, 2020. Owners may contact Kia customer service at 1‑800‑333‑4542. Kia's number for this recall is SC197.
Recall number 20V519000 · Recall details
Related investigations
Hyundai and Kia ABS Module Fires
The Office of Defects Investigation (ODI) has received eight Hyundai Motor America (Hyundai) and eight Kia America, Inc. (Kia) Part 573 Recall Reports between 2016 and 2023. The combined 16 safety recalls all involve the antilock braking system (ABS) modules or Hydraulic Electronic Control Units (HECU) manufactured by the equipment supplier Mando. The Part 573 Recall Reports contain varying defect descriptions and differing remedy descriptions for the same or similar equipment supplied by Mando. Safety recalls included in this Audit Query (AQ) review include: Hyundai recalls 20V‑520, 20V‑543, 21V‑161, 21V‑160, 21V‑303, 22V‑056, 22V‑810, and 23V‑651. Kia recalls 16V‑815, 20V‑518, 20V‑519, 21V‑137, 21V‑331, 22V‑051, 22V‑800, and 23V‑652 The purpose of this AQ is to evaluate the timeliness and scoping of Hyundai and Kia’s defect decision making and adherence with reporting requirements; and understand the varying defect descriptions and remedies between these recalls.
AQ23002
What 2015 Kia Optima owners say
Most recent owner complaints, unedited.
I would say that the time this incident happened I was driving and me and me nephew were in car at time taking to shop to see why it was making a sound like air and all of sudden the car started swerving and slowing down and then it made a pop sound and smoke started coming from the car and I was thankful that I didn’t get hit but affraid and also hit my head in car due to the sudden jerk car mad and then it popped sound a d smoke came from good. The next day I have to pay to get back on the other side and also tow it home which it been parked since but I see a recall on my vin and want to find out how to get it to the nearest Kia to fix the recall
The contact owns a 2015 Kia Optima. The contact received notification of the federal safety agency Campaign Number: 21V331000 (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 contact stated that while starting the vehicle, the check engine warning light illuminated. The vehicle was take to O'Reilly's to be diagnosed. The DTC: P1326; was retrieved. The contact attempted to start the vehicle, but the vehicle failed to start. The contact researched online and found the federal safety agency Campaign Number: 20V543000 (Service Brakes, Hydraulic). The dealer was contacted, and it was confirmed that the vehicle was included in the federal safety agency Campaign Number: 20V543000 (Service Brakes, Hydraulic); however, the dealer refused to repair the vehicle because the vehicle was not currently registered and additional repairs were needed before a recall repair could be performed. The vehicle was being towed to the dealer. The vehicle was not yet repaired. The manufacturer was made aware of the issue. The failure mileage was approximately 137,000.
The contact owns a 2015 Kia Optima. The contact stated that while driving at an undisclosed speed, the brake pedal became inoperable. The contact stated that while attempting to depress the brake pedal, the brake pedal failed to operate properly. However, while light pressure was applied to the brake pedal, the brakes responded and engaged properly. The contact stated that the failure had started after the vehicle was repaired under a recall related to the HECU fuse replacement. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 200,000.
The contact owns a 2015 Kia Optima. The contact stated that while driving at an undisclosed speed, the ABS warning light illuminated, and the vehicle went into LIMP Mode. The vehicle unintendedly decelerated to 5 MPH and started jerking abnormally. The contact referenced the federal safety agency Campaign Numbers: 21V331000 (SERVICE BRAKES, HYDRAULIC) and 20V519000 (SERVICE BRAKES, HYDRAULIC); however, the VIN was not included in recalls. The dealer was notified of the failure, but the vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 158,872.
The contact is calling on behalf of her grandson for a 2015 Kia Optima. The contact stated that while he was driving at approximately 35 MPH, the vehicle was making an abnormal sound and stalled. The contact stated he restarted the vehicle and was able to shift to drive (D), but the vehicle again stalled. The contact stated that he observed that white smoke was coming from under the hood. The contact stated that he pulled over and stopped the vehicle, opened the hood, and saw that smoke and flames had formed under the engine. The contact stated that he called the fire department. The fire was extinguished using foam. The vehicle was towed back to the contact's residence. The contact had not called a dealer or the manufacturer. The vehicle was not diagnosed or repaired. The contact had researched online and related the failure to the federal safety agency Campaign Number: 21V331000 (Service Brakes, Hydraulic). The contact stated that her grandson had not received a recall letter from the manufacturer. The failure mileage was 158,006.
My 2015 Kia Optima has a failing ABS/HECU module consistent with the Kia ABS fire recall. The brake lights stay on constantly even when the brake pedal switch is unplugged. If I unplug the ABS/HECU module, the brake lights immediately turn off, which confirms the ABS module is back-feeding power into the brake light circuit. I also previously experienced the ABS pump running with the vehicle turned off. Currently the ABS, ESC, EPS, and Brake warning lights are illuminated and all stability/ABS functions are disabled. This is a clear safety hazard affecting braking, electrical safety, and vehicle fire risk. I have already been to the Kia dealer twice and they dismissed the issue after only checking the recall fuse. They refused to address the ABS module itself even though the vehicle is unsafe. The recall appears insufficient because the module has now failed. I need Kia to replace the ABS/HECU module under recall safety remedy.
The contact owns a 2015 Kia Optima. The contact stated that while driving at 40 MPH, there was an abnormal knocking sound coming from the engine. No warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed with engine failure, and the contact was informed that the engine needed to be replaced. The contact stated that the dealer refused to repair the vehicle. The contact was informed that the HECU recall repair needed to be completed first. The contact was unaware that the vehicle was included in the federal safety agency Campaign Number: 21V331000 (SERVICE BRAKES, HYDRAULIC). The vehicle remained at the dealer unrepaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 77,000.
What component or system failed or malfunctioned, and is it available for inspection upon request? The defects involve multiple electronic control systems, including steering, braking, and airbag modules, which continue to generate active and stored Diagnostic Trouble Codes (DTCs) even after the May 2, 2023 recall repair. The vehicle remains in our possession and is available for inspection upon request. 2. How was your safety or the safety of others put at risk? Because the vehicle fails to illuminate dashboard warnings, we were unaware of critical malfunctions occurring in real time while driving. This creates the risk of sudden failure in steering, braking, or airbag deployment, directly endangering both occupants and the public. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. Independent diagnostic scans repeatedly confirmed active and stored DTCs following the recall repair. These findings show the defects are reproducible and ongoing. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle was inspected by Kia’s authorized dealer, Spradley Motors in Pueblo, CO, for the recall repair. Since then, diagnostic evaluations have been performed by independent service providers. Documentation of these inspections is attached. 5. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? No dashboard warning lamps illuminated, even though faults were recorded internally by the vehicle’s control modules. The absence of warnings despite active codes is itself the central safety issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
My motor bearing is knocking very loud I was refused service upon arrival dealer was making my service very complicated asking me to go dig up old receipts and various other things that was not actually caused for and I was at risk by driving the car there until it shut off due to engine failures when the car has fire risk and could possibly explode and they have confirmed it’s the engine but have not done any maintenance to my engine the check engine light flashes heavy non stop as well was even denied a loaner car still until today
Questions about the 2015 Kia Optima brakes
Does the 2015 Kia Optima have brakes problems?
Owners have filed 90 complaints about the brakes of the 2015 Kia Optima, 9% of all its complaints.
At what mileage do 2015 Kia Optima brakes problems start?
The typical (median) mileage in owner complaints is 90,000 miles.
Was there a recall on the 2015 Kia Optima brakes?
Yes, 3 recalls: 23V652000, 21V331000, 20V519000. Check your VIN to see if your car still needs the free repair.
What year does the Kia Optima have bad brakes?
The Kia Optima model years with the most brakes complaints are 2013 (114 complaints), 2015 (90 complaints) and 2012 (88 complaints).
Other 2015 Kia Optima problems
Engine 649Electrical 135Body 76Steering 69Fuel system 56Transmission 49Acceleration 36Airbags 26Lights 23Driver assistance 22Visibility 9Suspension 6Wheels 5Tires 3Seat belts 2Seats 2
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