Problems · by component

2012 Kia Optima service brakes, hydraulic problems

35 owner complaints to NHTSA about the 2012 Kia Optima cite service brakes, hydraulic, 4% of all 923 complaints for this model year. NHTSA also lists 1 recall on this component.

Complaints
35
4% of all complaints
Crashes
0
Reported by owners
Fires
7
Reported by owners
Injuries
1
Reported by owners
01 —Owner reports

What owners say about the service brakes, hydraulic

Verbatim from NHTSA complaints, newest first
“The contact owns a 2012 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 exceeded a reasonable amount of time for the recall repair. The contact stated that after starting the vehicle and driving approximately 5 minutes, then pulling into a carwash and placing the vehicle in the park, the vehicle lost power and a thick gray smoke began coming from underneath the hood of the vehicle. The vehicle caught fire. The contact was able to exit the vehicle however, the fire had consumed the vehicle, and caused the building the vehicle was parked in front of caught fire. The fire department had put out both fires. The vehicle was towed and deemed totaled. A police report was filed. The contact stated they were pregnant at the time of the fire and ended up having a miscarriage. Medical assistance was needed. The dealer was not contacted. The manufacturer was informed of the failure and opened a case. The failure mileage was approximately 120,000. Parts distribution disconnect.”
Owner complaint to NHTSAFiled May 27, 2025Service brakes, hydraulicFire reportedODI 11663037
“The contact owns a 2012 Kia Optima. The contact received notifications of NHTSA Campaign Numbers: 22V560000 (STRUCTURE) and 23V652000 (SERVICE BRAKES, HYDRAULIC). The contact stated while the vehicle was parked at the residential driveway and starting the vehicle, smoke started emitting from under the hood. The contact opened the hood and discovered smoke primarily emitting from the front passenger side of the vehicle. No warning lights illuminated. There were no injuries sustained. The contact was unsure if a fire report was filed and a police report was not filed. The fire was extinguished by the contact with three fire extinguishers however, the fire department used water to be certain the fire was extinguished. The vehicle had damages due to the fire, however, it was not destroyed. The vehicle was taken to the dealer where unknown repairs were needed however due to costs was taken back to the residence and remained in the contact's possession. The local dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and a case was created. The failure mileage was approximately 145,000.”
Owner complaint to NHTSAFiled Mar 10, 2025Service brakes, hydraulic, StructureFire reportedODI 11647487
“The contact owns a 2012 Kia Optima. The contact stated that while driving at 55 -60 MPH, the vehicle lost automotive power and stalled. The contact was able to pull over to the side of the road. The contact became aware of smoke emitting from the vehicle. The check engine warning light was illuminated. The vehicle was towed to the residence and then to an independent mechanic where it was diagnosed that the engine failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The vehicle was towed to the residence and was not being driven. The failure mileage was approximately 150,000.”
Owner complaint to NHTSAFiled Jan 8, 2025Service brakes, hydraulicODI 11634952
“The contact owned a 2012 Kia Optima. The contact stated that while at a stop light, smoke and flames were suddenly present coming from the engine compartment. The fire department was called to the scene and extinguished the fire. During the incident, the vehicle was destroyed and later towed to an inbound facility. No report was taken and no injuries were reported. The cause of the fire was not determined. The local dealer and manufacturer were not yet contacted. The contact was informed that the VIN was included in 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 151,000.”
Owner complaint to NHTSAFiled Nov 18, 2024Service brakes, hydraulic, Engine and engine coolingFire reportedODI 11625883
“The contact owns a 2012 Kia Optima. The contact stated while driving at undisclosed speeds, the brake pedal was depressed and went to the floorboard. The contact stated that several times the brake pedal was depressed approximately a half-inch to an inch. There were no warning lights illuminated. The vehicle was taken to an independent mechanic, who replaced the brake master cylinder. The vehicle was repaired, but the failure recurred. The local 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 35,000.”
Owner complaint to NHTSAFiled Oct 21, 2024Service brakes, hydraulicODI 11621075
“The contact owns a 2012 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 contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. Parts distribution disconnect.”
Owner complaint to NHTSAFiled May 22, 2024Service brakes, hydraulicODI 11590233

Showing 6 of 35 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 11, 2026NHTSA vehicle page
02 —Related recalls

1 recall on this component

Service brakes

Park outsideRemedy pending

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.

Service brakes, hydraulicReported Sep 25, 2023NHTSA 23V652000
Data from NHTSA Recalls API · synced Nov 11, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.