Electrical System Problems of Kia Motor Optima - part 1

While driving, my vehicle suddenly began shuddering and shaking. The vehicle lost power and would not accelerate properly. I had to press the brake pedal unusually hard. After parking, the vehicle would not move properly in reverse or drive. I turned the vehicle off and restarted it, and it moved only a short distance before shuddering again and losing power. The engine was making a loud buzzing or scooter-like sound. The vehicle became undrivable and had to be parked. I am concerned about a potential safety defect involving sudden loss of power while driving.

See all problems of the 2019 Kia Motor Optima 🔎.

I own a 2011 kia Optima, VIN [xxx]. My vehicle was taken to rockwall kia on August 25, 2026, for completion of NHTSA safety recall 23v-652 / kia sc284tf involving the hecu fuse. The dealership replaced the hecu multi-fuse and label kit. Before the recall repair, the vehicle was operating normally. The same day I picked the vehicle up after the recall repair, the vehicle began dying while I was driving. I also noticed a burning smell. I returned the vehicle to rockwall kia. Their August 31, 2026 repair order documents my complaint and states that the vehicle would die while driving and that this problem “did not begin until after recall completed. ” the repair order instructs the technician to inspect whether the recall was completed properly and diagnose the concern. I am concerned because the hecu recall involves an electrical short/overcurrent condition and kia's recall documentation specifically identifies burning/melting smell and smoke as warning symptoms. I am requesting that NHTSA document this complaint and review whether the post-recall stalling and burning smell could be related to the hecu recall repair or indicate a continuing safety problem. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2011 Kia Motor Optima 🔎.

I was having trouble with my left driver tire. 2 mechanics went to test drive the car to see what the problem was. As they were driving, the car died. They got it started but it ran horrible back to the garage. When they pulled in the driveway of the garage, the car started on fire. It was an engine fire but undetermined what exactly was the cause. The vehicle was looked over by the insurance claims adjustor. I am not sure if sluggish driving had anything to do with the fire. The car is totaled.

Blower motor is drawing excessive electricity, which in turn burns the fuse and junction pin, which in turn can start a fire in the car. Kia of irvine suggested redoing all electrical wiring in the car, but that will not solve the issue. As soon as you turn on the ac, the blower motor will use so much electricity and amperage, so the blower motor fuse and junction pins on the fuse box starting to burn. Wanting to charge almost $7000 to fix this issue, which is double the price value of the car, and risking to end up in this situation again, as soon as you turn on the ac, does not make sense. Kia should do recall on this model and fix the root cause, which is excessive electricity and amperage usage by the blower motor.

See all problems of the 2016 Kia Motor Optima 🔎.

Vehicle was purchased in 2023. Ac blower failure occurred for the first time in June 2024 and was repaired by pepboys. On 4/2/2025 the ve3hicle had an active recall event when the engine seized on the highway because of a faulty oil pump/filter, engine was replaced 4/17/2025 under that recall. Kia advised at the time that the wiring harness should be replaced due to electrical issues at the time but said that there was no recall for that work. At the time, there were no electrical failures of steering, brakes, all power etc. Nor did we know that those were a possibility. The wiring harness quote was $7,000, over the cost of the vehicle. It was decided to continue repairing the electrical issues as they came up, it was assumed that the fuses would blow before there because a safety or total vehicle failure, as automobiles are designed that way. 8/4/2026 the vehicle experienced a complete and total loss of power resulting in a traffic crash into another vehicle as the brakes felt like you were trying to push a wall rather than a pedal. There was minimal physical damage to the other car and the kia, the other driver got my husband's insurance information and then drove off. The car did startup after ~30 minutes or so and was driven home, but taken to the kia dealership the next day. It was said that the blower motor overheated and melted a portion of the electrical junction box under the hood and that it was unsafe and dangerous to drive. Kia said that there were no active recalls for this work. Nhtsa sc351 seems very similar to this issue that has plagued this car since the beginning. We would ask that kia incorporate this vehicle and others outside of the year/model ranges in sc351 that have similar failure mechanisms as this seems common.

I owe a lady made a complete stop in front of me and I hit her. I wasn’t traveling close behind her. Her car was not damaged at all, but my kia was totaled from the front. They had to cut the car off because it was smoking like it was gonna catch a fire. I’ve been had this sign on my car the steering wheel with an! it says that the car is hot before the car accident I had driven to [xxx] back to my house in the car motor was just shaking up under even though the car was off about 1015 minutes a hour late I had to wreck. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2014 Kia Motor Optima 🔎.

On 7/13/26 around 0715 my son was driving our 2014 kia Optima when it caught fire and burned from the engine to the back of the car. Fire dept and law enforcement had to respond and the vehicle along with thousands of dollars of property was destroyed by the fire. This vehicle is a total loss and I’m trusting an investigation as to I believe their fire started due to the engjbe and electrical faults of Kia Motors.

The contact owns a 2011 kia Optima. The contact stated that while the vehicle was parked in a parking lot, he noticed the vehicle started smoking heavily from under the hood, and shortly thereafter, the vehicle fully ignited into flames. The vehicle was occupied during the fire. The contact stated that he noticed smoke emerging from the driver-side section of the hood. Furthermore, the contact noted that the power door locks failed to unlock automatically, requiring him to manually unlock the door to exit the vehicle safely. The color of the smoke started off light and quickly turned black. The contact stated he noticed a burning electrical odor during the fire. The fire started at underneath the hood, and stayed in the engine bay. No property damage. The location of the fire was the engine compartment. The fire was extinguished by the local fire dept by water. A fire department report was not filed. No police report was filed. The vehicle was totaled. No injuries occurred. The vehicle was towed to a independent auto shop. The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage on the odometer was 219,000, but the vehicle had a previous engine replacement.

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.

See all problems of the 2015 Kia Motor Optima 🔎.

The kia had a problem with the check engine light coming on and it gently went into limp mode. I had it repaired at darlings Ford and it worked for about 600 miles. I had it repaired again and it worked for about 7,000 miles. The light recent came on and the car immediately hard banged andwent into limp mode. My wife was driving and shaking when she got home. The light went out and everything was fine. A couple of days later, on 5/27/26, we were on the interstate in traffic travelling 70 mph and it violently hard bumped, the cel came on and it went into limp mode. It was as if we hit deep pot holes with both front tires which we didn't as we were on a smooth highway. The light is still on and it's in limp mode.

The horn stops working, steering heat stop working, control functions and air bag warning. I changed the clock spring and it fixed all those issues the first time but within 6 months all those issues happened again. Is there something more wrong?.

See all problems of the 2012 Kia Motor Optima 🔎.

While driving at highway speeds on the freeway in san diego, the engine of my 2016 kia Optima catastrophically seized without warning. I instantly lost all power steering, brake assist, and electrical power, creating an immediate life-threatening emergency. The vehicle was towed to a kia dealer. Corporate techline and the dealership are refusing to perform the mandated settlement rod bearing test and are falsifying paperwork to deny the safety remedy.

The car is available upon inspection, the car caught on fire after being driven for about 45 mins. Smoke started to come from under the car hood, fire starting dropping from underneath the vehicle and then fire started coming from under the hood of the car. The car started smoking while being inside vehicle and the fire could've spread. The fire was put out by the fire department, the vehicle has not been inspected as of yet. No warning signs.

A issue with the valve cover gasket leaking into the engine causing a misfire. Making the car suddenly stop while driving which is very unsafe. I took the car to the dealership and they want to charge me for the repairs. I have 2 kia Optima hybrid and both cars have the same issue around the same mileage. There were no warning lights during the time it was at the shop. However one day the check engine light did come on and the obd code p1326 came up. When I took it to the shop the check engine light disappeared and the dealership said they will not check my engine unless they see the code on their end. I believe later down the line the engine will stall out and it should be fixed now while under warranty. However I received no help from the dealership unless I am willing to pay upfront. In addition to this there are electrical issues the front seats aren't moving immediately when the button is pressed. The steering wheel buttons barely work along with the radio. This is a huge problem that needs to be fixed.

My rear passenger side window would not go up or down & the motor would run when the button was pressed. That was in January 2026. Now April 2026, my driver's side rear window will not go up or down.

On March 23, 2026, I took my 2017 kia Optima plug-in hybrid (VIN: [xxx] ) to mark kia [xxx] ) solely for two open safety recalls: sc218 (engine inspection/replacement and ksds software installation) and sc278 (emergency trunk latch release) under repair order #6807251. No customer-pay work was performed. The multi-point inspection that day noted only the cabin air filter. During the drive home on March 23, a faint rotten-egg (h?s) smell appeared for the first time. By the morning of March 24, 2026, the smell was severe. I immediately returned the vehicle. Under new repair order #6807360, a second multi-point inspection suddenly recommended $1,134. 10 in customer-pay services (new 12v battery, fuel induction service, cooling system service, brake fluid exchange, and atf exchange) that were not flagged the previous day. Since the recall service, the vehicle has developed numerous new defects that never existed before: rotten-egg smell (h?s) intermittent ac that blows warm in stop-and-go traffic passenger-rear power window clicks but will not roll down brake warning (“stop vehicle and check brakes”) “key not detected” message passenger-side mirror pushed in with temporary motor malfunction 12v battery cover left completely disassembled and misplaced in the trunk complete no-start / dead 12v battery condition (will not crank even after multiple jump attempts as of March 30, 2026) on March 24, 2026, I sent a formal demand letter by certified mail (received and signed for by the dealership on March 27, 2026) giving mark kia five business days (until close of business March 31, 2026) to provide a free tow, free loaner, and free repair of all defects. I followed up with six supplemental addendums (dated March 24–30, 2026) attaching photos and videos of every issue. On April 1, 2026, service director [xxx] replied by email and admitted in writing (twice) that the dealership did not follow recall procedure information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2017 Kia Motor Optima 🔎.

The contact owned a 2015 kia Optima. The contact stated that while driving at 60 mph, during a doordash delivery, the vehicle vibrated. The contact pulled to the side of the road and noticed smoke emitting underneath the vehicle from the right side. The contact exited the vehicle and noticed smoke emitting from underneath the hood. The state troopers were called. By the time the fire department arrived, the vehicle was engulfed in flames, and the engine had exploded. The fire department extinguished the fire. The contact was not injured. No police report was filed. The state troopers believed that the fire was caused by an electrical short. The contact stated that prior to the fire, the vehicle vibrated when idled. No warning lights were illuminated. The vehicle was towed to a towing yard. The insurance company was not notified about the fire. The contact was unaware that NHTSA campaign number: 21v331000 (service brakes, hydraulic) was associated with the VIN. The manufacturer was not notified of the fire. The failure mileage was approximately 174,000.

I am submitting this complaint regarding ongoing and persistent mechanical issues with my vehicle since the time of purchase. The vehicle has repeatedly shut off unexpectedly, creating a serious safety concern. Initially, I suspected the issue might be related to the battery, and I have replaced the battery twice within the past 4 years. However, the problem has continued. In January, the vehicle began shaking and shutting down again. I took it to a mechanic, who diagnosed the issue as faulty spark plugs and an ignition coil. The diagnostic codes provided were p0303 and p0456, and the recommended repairs were completed. Approximately one month later, the vehicle began shutting off again. I then took it to the dealership, where I was advised that the valve cover gasket needed to be replaced, along with the belts, and that a fuel system cleaning was required. I subsequently had these repairs completed by my mechanic. Less than a week after completing those repairs, the vehicle once again began shutting down. A diagnostic scan then produced code p123300. In addition to these repeated shutdowns, the vehicle consumes an excessive amount of oil, has poor acceleration, and continues to stall unexpectedly both while driving on the road and while idling, such as in a drive thru. These recurring issues have made the vehicle unreliable and unsafe. I am concerned about the risk of the vehicle shutting off while in motion, which could lead to a dangerous situation. I am requesting that this matter be reviewed for potential defects or safety-related concerns.

See all problems of the 2018 Kia Motor Optima 🔎.

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.

See all problems of the 2013 Kia Motor Optima 🔎.

My car started shutting down while driving. After the engine started seizing the key wouldn't turn in my ignition. Took car to dealership immediately on 10, 2026. Took again in 2024 for recall and other repairs. Found out after requesting previous service incidents they failed to do recall repairs and never notified me of it, or to come back. I've requested current diagnostic report several times in writing and verbally with codes for this current service, with non compliance. My car is still at the dealership needing work and I need current diagnostic report before I pay for repairs. I am attaching a dealership diagnostic e-report for my 2013 kia Optima from 2024. While the report lists “no current dtc” for several systems, it also documents multiple “communication fail” errors across critical modules, including Smart key, head lamp, air conditioner, brake, and other systems. These communication failures indicate a broader electrical or network issue within the vehicle, not simply a failed battery. The report also shows that certain diagnostic scans were not properly performed. Additionally, there are historical fault codes related to tpms and weight classification systems, further supporting that the vehicle has experienced ongoing electrical issues. Despite these findings, the dealership attributed the vehicle failure solely to a bad battery and did not provide a current battery diagnostic test. They also failed to address an open recall related to electrical/fuse issues prior to this failure. Based on this past diagnostic report, I believe the root cause of my vehicle’s failure is an unresolved electrical defect, potentially related to the outstanding recall, rather than normal battery wear. This has resulted in my vehicle becoming inoperable and poses a serious safety concern.

Drove roughly an hour from roseville mi to temperance mi. Car was fine. No issues on the drive. Gauges were all fine. Got to my friend’s house and took my stuff inside. Came back out immediately and saw dark smoke now coming from the hood. Attempted to open, but couldn't unlatch the hood after it was popped. Saw flames and called 911. Entire car burned down to the back seats. Car seat, reading glasses and personal items destroyed. Fire fighters put it out and police took report. Kia after review states they dont know why it happened. Also has taken forever and not offered to compensate me in any way shape or form. Received their “findings” a day ago, April 30. Date of fire was Feb 11th 2026.

My car suddenly caught fire in my driveway tonight 2/6/26 roughly around 9:40 pm. Fire department has been dispatched to come out and investigate if the fire has been properly extinguished and it does warrant any further safety hazards until kia can be notified and resolve this issue.

Unknown.

Yesterday, [xxx], my 2015 kia Optima engines reved up wothout me pushing the gas & within seconds later a loud noise and metal fell from under the hood. After pulling over, popping the hood on the passenger side and under the engine a fire had started. My daughter was seated in the back passenger side her door had locked, thankfully the passenger door was left opened bc within minutes the entire car was filled with smoke and engulfed in flames. Prior to this the steering wheel would jerk even while at a red light. This car just did have 100,000 miles & no knowledge this prior. Thank god I was able to get my daughter out of this vehicle & this didnt end in a tragedy due to negligence if this was a prior known fact. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The car starts and drives with other keys in ignition.

My car has a engine light on an I was told it has a recall on it it a fuel sending unit-n and a fuel pump lock ring -n.

I was sold an unsafe vehicle at j and j auto house 6446 wilshire bl la,CA 90022. Dealer withheld condition of car . Had car three months and was stranded on highway. Car was towed to kia dealer and diagnosed with complete engine failure. Dealer will not honor limited warranty, shady sales practices withheld recall info during sale, won’t allow his mechanic to look at car, dodged calls, denied request to return car for refund.

I received a recall notice for my 2013 kia Optima, VIN #: [xxx] related to engine issues and an increased risk of fire. After receiving the recall notice, my vehicle began smoking and briefly caught fire while in operation. I immediately shut the vehicle off, and the smoke and fire stopped. For safety reasons, the vehicle was towed by my insurance company to my aunt’s residence, which was the closest safe location at the time. The vehicle was unsafe to drive. No injuries occurred, and the fire department was not called because the fire stopped once the vehicle was turned off. I believe this incident is related to a known safety defect and recall involving kia Optima engine fires. I have contacted kia multiple times regarding this issue, and there have been delays in addressing or repairing the vehicle. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I’ve gotten my vehicle fixed four times now thinking it was an electrical issue, not aware of the recall. Did my research this fifth time when my brake lights completely went out and smoke at some point in times come through my air-conditioning. I’ve spent more money trying to fix the vehicle with no idea that there were issues already about it.

The contact called on behalf of her daughter who owns a 2017 kia Optima. The contact stated while driving at approximately 60 mph, the vehicle made an abnormal knocking sound, the cruise control was inoperative, the infotainment screen darkened, and the charging outlet was inoperative. The check engine warning light was intermittently illuminated. The vehicle was taken to the contact's residence, and the contact used a vehicle scanner to scan the vehicle. The contact stated that dtc: p1326 for the knock sensor detection system (ksds) was found, which detected excessive engine vibration. A dealer was contacted; however, the vehicle was not diagnosed or repaired by the dealer. No further information was available. The failure mileage was approximately 98,000.

Module 1 7. 5 amp fuse continues to short and blow over and over again. Known issues with auto headlamp leveling sensor. Problem continues to happen. Lose my highbeams, shift lock, rear defrost, rearview auto dimmer, steering wheel controls. Anytime the fuse blows.

In September of 2025, my radio and back up camera stopped working. I contacted hayward kia and was informed by staff member, eraca craig, that my 2015 kia Optima needed a software update that was covered by a recall. I waited several weeks for the dealership to contact me once the update was available. During the waiting period my car's battery started to drain intermittently. I had to have the battery recharged multiple times by aaa. The battery would stay charged for a few days, maybe a week, then I'd experience the same issue. Aaa towed my car to kia hayward on October 3, 2025. They charged my battery and kept my car over night to see if the battery would stay charged, it did not. Eraca told me that the ac delco battery I purchased on January 16, 2025 was not "compatible" with my car. She recommended a factory kia battery which I purchased on October 7, 2025. By November 1, my kia battery had drained. Aaa recharged the battery and it held a charge until November 25, 2025. When I took my car to kia on November 11, 2025 for the software update, I was told that the update did not apply to my malfunctioning radio and camera therefore I needed to replace the entire unit for $4,080. 49. On December 6, 2025 I had a diagnosis performed on my car, it reported codes c1102, b1102, b1112, and p000. C1102 indicates an issue with the hecu. My 2015 kia Optima has had three recalls related to the hecu (#sc284,#sc212, &#sc197). On December 8, 2025 I made a request, via e-mail, to eraca craig that my hecu be inspected for leaks and to have the hecu fuse replaced. I understand that these services were recorded as performed in the past, but I need them performed again because I'm not satisfied that kia has remedied the situation. I've also filed complaints with the kia customer care center. My case numbers are #25697367 and #25723089.

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 incident took place on Sunday, December 30th. I was driving to pick up my children from their father and on our way home my car stopped accelerating entirely. This had only happen one other time a few days prior. I was in a gas station parking lot and initially when I turned my car on and went to put it into drive it wouldn’t accelerate. I thought that was odd so I did the only thing I knew how to, I checked my oil levels. Levels were full and no other issues were there. The check engine light had popped up when I turned my car back on but my car did accelerate so I thought nothing of it. I took my car to auto zone for a diagnostic and they told me my “b cam shaft” sensor needed to be moved and that could be causing the engine light to come on and ticking in my motor. I called a few shops getting quotes and eventually was forced to tow to the closest shop to me after my car refused to start overall. They replaced the battery and the b cam shaft censors and still were unable to get the car started. They told me 3 recalls were open on my car, including the motor and to have it towed to kia for a full replacement. After calling kia to have the repairs done, they refused me service based on a previous owner not handling prior recalls.

I turned the car off, it had difficulty turning back on and the brake pedal got really hard. I had to wait about 30-45 minutes and then I was able to get the car started and brake pedal back to normal and no lights. Recently, I left the car on to run into a shop real quick and come back out. When I got back to the car, the power steering light, battery, and warning light?(amber triangle with ! in the center of it) were all on. I rev the engine and the issue went away for a quick second but then came back on. To avoid turning my car off and being stuck, I just shift to reverse and tried to leave. I’m backing out of the spot and now the backup camera is going in and out lights flashing on the dash and I’m trying to brake but the brake pedal isn’t registering and next thing you know, I’ve backed into a guard rail. On the way to drop my kids off at the babysitter, I was coming to a stop sign, and my car wouldn’t brake, I went through oncoming trafic and had to run off the road. Kia did a multi point inspection a few months apart from one another. One the car tested fine, then the second time they are saying a brake booster and no engine oil in the vehicle and that the car is basically trash. The oil light goes on and off and I can smell burning oil. I still owe 7 grand on this car and I just bought it last year and it was seamingly fine.