See attached document for complaint.
2015 Kia Optima engine complaints
Page 4 of 23: complaints 71 to 100 of 649, newest first, as owners wrote them.
As I was driving going at a rate of 40 MPH my engine shut off. I was able to pull to the side of the road without an accident thankfully. Cranked the vehicle back up and then the same thing it happened again. No check engine light came on either time. Drove for another 200 miles no issues. Going apx. 75 MPH it went into limp mode and check engine light came on and the P1326 code appeared. There is a recall on this vehicle for this code. However the dealership states it’s a knock sensor needing to be replaced and I will have to cover that. The same knock sensor they had me update in 2018 under there advisory. The motor burns apx. 2 quarts of oil every 3000 miles. Requires oil to be added to maintain oil level in between oil changes. Irregular mechanical noise (rattle) during cold start ups. I am scared to drive this vehicle and do not feel I am being treated fairly due to the recalls on this engine.
The contact owns a 2015 Kia Optima. The contact stated while driving approximately 75 MPH, the vehicle independently decelerated to approximately 60 MPH. The contact stated that the check engine warning light was flashing. The vehicle was towed to the local dealer, but the cause of the failure was not yet determined. The contact stated that a knock sensor was installed to monitor the engine performance. The manufacturer was not yet contacted regarding the failure. The failure mileage was 70,000. The VIN was not available.
I was driving on the freeway when I noticed smoke coming out of my hood. I immediately exited the freeway, pulled over, popped the hood open, and my engine was on fire. There were no warning lamps on my dash. I don’t know which components were involved and inspection of the components after was not possible, because everything under the hood burned by the time firefighters responded.
I purchased a 2015 Kia Optima 2.4L GDI (VIN: [XXX] ) with a blown engine, which is covered under Kia’s extended engine warranty. I contacted Jim Butler Kia in Chesterfield, MO, where the last service was performed, and requested the free engine replacement under warranty. They acknowledged that the car is covered, but refused to perform the repair because the vehicle is not yet registered. I explained that I have the title in my name and proof of ownership, but cannot register the car in Missouri because it does not run and must pass safety and emissions inspection to be registered. Despite showing them the title and explaining the situation, they continue to deny warranty service. I believe this is unfair and against Kia’s warranty policy, which requires proof of ownership—not necessarily registration. I’m requesting the dealership to honor the warranty and perform the repair, as the issue is known and covered by Kia’s engine recall campaign. I am not seeking financial compensation—just proper and fair warranty service for a defect Kia already acknowledges INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2015 Kia Optima. The contact stated while driving 55-60 MPH, the engine seized. There was no warning light illuminated. The contact inspected the vehicle and became aware of a burning odor around the exterior of the vehicle. The contact attempted to start the vehicle; however, the vehicle failed to start as intended. The vehicle was towed to the residence. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 85,000.
Vehicle experienced sudden loss of power while driving when cylinder 3 completely failed (0 PSI compression). Metal particles found in oil and excessive oil consumption (1 pint/100 miles). KIA dealer diagnosed as piston rings but ignored metal in oil that suggests bearing failure covered under recall campaign. Refused proper diagnostic testing. Vehicle now unsafe to drive with failed cylinder that could cause complete engine seizure while driving. Kia had all recommended services and oil changes since acquired in 11/2016. These service records demonstrate the progression of my vehicle's engine issues, from early oil consumption problems documented by York Auto Care in July 2023 (3 quarts low) to complete cylinder 3 failure with zero compression confirmed by Kia's own diagnostic testing in May 2025. Despite this documented history and Kia's own test results showing catastrophic engine failure, they have denied warranty coverage under their engine campaign that specifically covers bearing-related failures on my 2015 Kia Optima 2.4L.
The contact owns a 2015 Kia Optima. The contact stated while driving approximately 65 MPH, the check engine warning light illuminated. The contact stated that the vehicle started to lose motive power. The contact pulled off the roadway and heard an abnormal grinding sound coming from underneath the vehicle. The contact turned off the vehicle and the vehicle was unable to be restarted. The contact had the vehicle towed to a local dealer who diagnosed the vehicle and determined that the engine needed to be replaced. The contact was advised that the following DTC were retrieved: P0076; P0079; B2519; B2521. The vehicle was not repaired. The manufacturer was informed of the failure and informed the contact that there was no recall on the VIN for the engine. The failure mileage was approximately 140,000.
My car has less than 50,000 miles on it. I was driving at around 40 miles per hour and my engine suddenly stalled. My car was towed to the nearest repair facility and a diagnostics was completed on it revealing a seized engine. My car has been well maintained and has never been in a repair shop for any type of major repairs. This engine failure came as a complete surprise as the car gave no indication that there was a problem. Kia Motor Company has recalls on other cars with the same make, model, year and engine size as mine that have had the same exact issue as what mine has presently. However, when I look up my VIN on their website my car only shows 1 recall which is unrelated to the issue I am currently experiencing. I would like to understand why my car is not included in this recall, when my car has had, at this point, the same exact thing happen as these other cars of the same make, model, year and engine size?
Having issues with my engine, it’s throwing the code saying that my glow relay is stuck on and has something to do with the knock sensor, which is on a recall on 2015 Kia Optima, but my VIN number doesn’t seem to be one that’s on the recall list, but my engine is doing the same thing that the other ones are being recalled for.
I am contacting you regarding my 2015 Kia Optima EX (VIN: [XXX] , while driving, I experienced a sudden strong burning smell followed by heavy white smoke from the engine area. Shortly after, the engine stalled, and the vehicle had to be towed. I have verified that there are no open recalls or settlements listed for my vehicle. However, based on the known engine issues affecting similar models, I am respectfully requesting goodwill assistance from Kia to repair or replace the engine. I have always taken good care of my vehicle, and I believe this issue may be related to broader known concerns with the engine models from those years. I would appreciate your help in reviewing my case and offering any available support to resolve this issue. Thank you for your time and consideration. I look forward to your positive response. Sincerely, [XXX] Pho [XXX] ail: [X [XXX] [XXX] [XXX] SUANT TO [XXX] FOIA), 5 U.S.C. 552(B)(6) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2015 Kia Optima. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to coast to the shoulder of the roadway, where the vehicle was able to be restarted. However, several days later the failure reoccurred, and the contact heard an abnormal sound coming from the engine compartment, prompting the contact to discontinue driving the vehicle. No warning lights were illuminated. The vehicle was towed to the dealer, who diagnosed a nondescript failure with the engine. The contact was informed that the engine needed to be replaced. After investigating the failure, the contact related the failure to the federal safety agency Campaign Number: 18V907000 (Fuel System, Gasoline, Engine), but the VIN was not included. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the federal safety agency Hotline for assistance. The failure mileage was 96,000.
The contact owns a 2015 Kia Optima. The contact stated while driving at an undisclosed speed, the vehicle lost motive power. There was no warning light illuminated. The vehicle was towed to an independent mechanic where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. 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 not available.
See attached document for complaint.
We are submitting this claim because the engine on the vehicle is completely locked up at only 50,000 miles, despite the maintenance being fully up to date. This issue appears to be directly related to the well-documented rod bearing failure that Kia has previously issued recalls for across various models and years. We have contacted several Kia dealerships in our area—including those in Anniston, Trussville, Huntsville, and even across state lines—seeking assistance. Unfortunately, all of them have refused to proceed with an engine replacement due to the vehicle having an older KSDS (Knock Sensor Detection System) software update. While we have documentation that the original update was completed within the required timeframe, they are now stating that a newer version of the software is required in order to move forward. However, when we reach out to Kia dealerships requesting this updated version, we are told that they cannot perform the update because the engine is already locked—placing us in a frustrating and seemingly impossible situation. We are essentially being told we need the update to fix the issue, but the update cannot be done because of the issue itself. We’ve also contacted Kia Corporate, and unfortunately, the response has not been helpful. We’ve been told that the recall campaign tied to this issue has closed, and that there is nothing more they are willing to do. Meanwhile, we are left with a vehicle that cannot be driven, despite only having 50k miles, and which we are still making payments on. This feels incredibly unfair and potentially unlawful, considering Kia has acknowledged bearing-related failures in similar vehicles. We are simply asking for accountability and support for a problem Kia is well aware of. We are at a complete standstill, with no cooperation from dealerships or corporate.
The engine shut off while on the highway, car was still moving but not power from engine when accelerating the gas, not leaks or lack of maintenance
Was driving down the highway and all of a sudden the car shut down in the highway lucky cars was not close by. Tried to crank it it would not crank would not take a boost it won’t say anything I had the battery checked at auto zone the battery is really good. The mileage on the Kia optima is 1,900 actual miles it will not crank or move it was very scary I called Kia customer service there wanted to charge me over $400.00 dollars to come get it and take it to the shop so it took me 2 days to find a tow to get it home and it still needs to go to the Kia shop
The contact owns a 2015 Kia Optima. The contact stated that while driving 70 MPH, the vehicle inadvertently lost motive power. The contact was able to pull over to the shoulder of the roadway, where the vehicle failed to restart. After a visual inspection, the contact observed an excessive amount of oil leaking from underneath the engine compartment. No warning lights were illuminated. The vehicle was towed to an independent mechanic, who diagnosed a failure with engine failure, observing a hole on the side of the engine block. The vehicle was not repaired. The vehicle was then towed to the dealer however, the diagnosis was not yet confirmed. After investigating the failure, the contact related the failure to the federal safety agency Campaign Number: 18V907000 (Fuel System, Gasoline, Engine), but the VIN was not included. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the federal safety agency Hotline for assistance. The failure mileage was 112,000.
I purchased a 2015 Kia Optima Hybrid on [XXX], from Nissan of Grapevine, TX. The vehicle had an open safety recall issued in 2021 (PI2104) related to engine failure, but neither Kia nor Nissan informed me of this recall before my purchase, nor was the recall repair ever performed. On [XXX], my engine suddenly seized while driving, leaving me stranded. I had the vehicle towed to Meineke in Pflugerville, where they confirmed the engine failure but declined to perform an official diagnostic due to liability concerns. In 2024—over a year after my engine had already failed—Kia America finally mailed me a recall notice. By this time, the damage was irreversible. I took the car to Kia of Round Rock on April 2, 2024, where I was charged a diagnostic fee despite the engine failure being caused by the known recall issue. Kia then denied me warranty coverage, claiming I was ineligible because the recall repair had not been performed prior to the failure—even though I was never informed of it in time. Now, my vehicle has been impounded at AusTex Towing since March 6, 2025, because it is inoperable and cannot be registered. If I cannot afford the impound fees, my car will be auctioned off, leaving me responsible for payments on a vehicle I can no longer use. Safety Concerns: -Sudden engine failure while driving poses a serious crash risk. -Failure of recall notification system—I was only informed AFTER my engine had already failed. -Negligence by the manufacturer and dealership—Neither Nissan (the seller) nor Kia (the manufacturer) addressed the recall prior to the failure. I am requesting that the federal safety agency investigate Kia America and Nissan of Grapevine’s handling of this recall to determine whether their actions constitute negligence in notifying owners about critical safety defects. Kia should be held responsible for either covering the cost of repairs, offering a buyout, or reimbursing me for my financial losses (towing, impound fees, and loan payments). INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FO
When driving on the highway my car suddenly started to stall with me on the highway. It went from 80 miles per hour to 20 miles per hour and then completely shut off in the lane of the highway. Thankfully I was able to pull over to safety. I attempted to start again, and the engine started with a weird noise coming from it. I had it towed to my local Mechanic who told me that my engine is part of a safety recall.
The contact owns a 2015 Kia Optima. While the contact's sister was driving at an undisclosed speed, there was smoke coming from the engine compartment. The contact stated that several unknown warning lights were illuminated. The contact's sister parked the vehicle and performed an inspection of the vehicle. The contact's sister opened the hood and confirmed the smoke was coming from the engine. The vehicle was restarted; however, the vehicle failed to operate as intended. The vehicle was towed to the residence. The vehicle was then towed to the dealer; however, the dealer provided an unofficial diagnostic result of possible engine failure. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 106,000.
I was driving home from work when my car started to herk. So I pulled over turned my car off. When I started it again it started to knock and not accelerate. I scanned the computer telling me that it was a knock sensor. I took it to a mechanic and he told me there were brass shaving in my oil. Also said I need to replace the engine because of the problem.
The engine started knocking so I started driving to the dealership. The car stalled on the highway and wouldn’t restart. I’m having it towed to the dealership. My daughter has the same engine and it did the same thing. KIA replaced her engine.
The contact owns a 2015 Kia Optima. The contact stated while driving 70 MPH, the vehicle lost motive power. There was no warning light illuminated. The contact pulled over, stopped on the shoulder lane, and had the vehicle towed to a local dealer to be diagnosed. The contact was informed that the knock sensor was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 98,000.
The contact owns a 2015 Kia Optima. The contact stated while driving at an undisclosed speed, the vehicle stalled with the check engine warning light illuminated. The vehicle was restarted; however, the failure recurred. The vehicle was taken to an independent mechanic, where it was diagnosed that the engine had failed and needed to be replaced. The vehicle was not repaired. The vehicle was taken to the dealer, where it was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 145,000.
On October 10th 2024, my 2015 Kia Optima caught fire while I was driving. The fire originated from the engine compartment, completely engulfing the vehicle in flames within minutes. Component/System Failure: The exact cause of the fire is unknown, but Kia had previously issued a recall for this model due to an engine defect that posed a fire risk. The vehicle is no longer available for inspection as it was completely destroyed in the fire. However, I have multiple videos documenting the incident, including footage of the fire and the aftermath. Safety Risk: My safety and the safety of others were severely compromised. The fire started suddenly while I was driving, forcing me to evacuate the vehicle immediately. If I hadn’t reacted quickly, I could have suffered serious injuries or worse. Additionally, the fire posed a danger to other drivers and pedestrians nearby. Reproduction/Confirmation: The issue has not been reproduced, but it aligns with the recall Kia issued for this model. Prior to the fire, I attempted to schedule an appointment with Kia to address the recall, but I never received confirmation, and no inspection was performed. Inspections: After the incident, I contacted Kia, and they sent an investigator to inspect the remains of the vehicle. No police or insurance representatives conducted an independent inspection. Warning Signs: There were no warning lights, messages, or obvious signs of a problem immediately before the fire. However, I had previously noticed a recall related to fire risk for my specific model and attempted to schedule an appointment with Kia, but they never responded. Given Kia’s history of engine fire recalls, I strongly believe this incident is related to the known defects in this vehicle model.
The engine blew and it's making a knocking rod noise.
My wife driving the 2015 Kia Forte on [XXX] on [XXX] Mile Marker [XXX] North bound at 60mph and vehicle lost all power and caught on fire. The vehicle coasted to the side of the road. Police and fire were called and extinguished the flames. There were no accidents or no injuries. I attempted to get KIA to resolve the case as the Theta Engine is known for this issue. Kia refused all claims under Kia Customer Care Case number [XXX]. Kia of Dayton Car dealership reported an engine connecting rod broke and ejected out the side of the engine allowing engine oil to hit the exhaust manifold starting the fire. This is know Safety Issues with this Engine Series that Kia refuses to honor past Law Suit Settlement. I have the Police report, Fire Dept. Report, and Estimate for repair. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
I was driving to a new job , it was about 5:45am when I noticed my car wouldn’t go faster or stop. I seen fire , tried to stop car, I was going about 15-20 mph when i decided to just get out of the car and run , care went into complete flames
The contact owns a 2015 Kia Optima. The contact stated while driving 55 MPH, the vehicle shut off with several unknown warning lights illuminated. An independent mechanic spotted the contact on the side of the road and helped. The mechanic was able to restart the vehicle; however, the vehicle immediately shut off with a loud clanking sound and a burning odor coming from the vehicle. The vehicle was later towed to the residence. Despite the failure, the contact was able to drive the vehicle to an independent mechanic and was informed that the VIN was included in the federal safety agency Campaign Number: 21V331000 (Service Brakes, Hydraulic). The vehicle was driven to the residence and a mobile mechanic inspected the vehicle. The contact was informed that the VIN was under recall and was advised to take the vehicle to a dealer for assistance. The vehicle was towed to a dealer and was diagnosed with engine failure, which voided the recall due to the diagnostic test. The contact was offered a buyback which was refused. The contact was then referred to the manufacturer and was informed that the vehicle was out of warranty and that any repairs would be an out-of-pocket expense. The contact drove the vehicle back to the residence despite the failure and the vehicle repeatedly shutting off. The contact called another mobile mechanic and was informed about a recall and related the failure to the recall. The vehicle was not repaired. The failure mileage was approximately 130,000.
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