2019 Kia Optima Fuel system Problems

Strong smell of gasoline from the rear of the vehicle started around 60,000 miles . Car dealership said it’s normal but I don’t smell other cars like this

NHTSA ID

11751255

Incident

Apr 14, 2024

I am reporting a recurring safety hazard involving my 2019 Kia Optima following a repair for diagnostic code P064A (Fuel Pump Control Module). Despite the dealership attempting to repair the fuel system, the vehicle remains in a 'limp mode' state. While driving, the vehicle began shaking violently and lost significant power, refusing to accelerate above 50 mph. This creates an immediate safety risk, as the vehicle cannot maintain highway speeds or safely merge, increasing the danger of a rear-end collision. The P064A code and subsequent 'limp mode' symptoms persist even after professional service. I am concerned that the existing Kia warranty extensions (such as WTY028 for the low-pressure fuel pump) or current repair procedures are insufficient to resolve this underlying mechanical/electronic failure, leaving the vehicle unpredictable and hazardous to operate in traffic.

NHTSA ID

11742841

Incident

Mar 14, 2026

Even after regular oil changes car requires an additional 4 bottles of oil every 2 weeks. Now the car is jumping and having a misfire.

NHTSA ID

11728158

Incident

Mar 3, 2026

I purchased this vehicle on [XXX], with approximately 170,150 miles. On [XXX], during a routine oil change at approximately 172,636 miles, it was discovered that the engine had no oil present. Shortly afterward, the oil warning light began flickering intermittently while driving. On November 4, 2025, at approximately 175,495 miles, a certified mechanic again confirmed that there was no oil present in the engine. At no point were there visible external oil leaks, indicating excessive internal oil consumption. This condition creates a serious safety risk, as sudden engine failure while driving could lead to loss of power, stalling, or accidents. Based on my experience and publicly known issues involving Kia engines, this appears to be a systemic defect rather than normal wear. I am requesting that NHTSA document and review this issue as a potential safety defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11710748

Incident

Oct 7, 2025

After routine maintenance replacing the valve cover gasket, the low pressure GDI fuel line developed a leak in an area away from where the maintenance had occurred. After a 10 minute drive, the car developed a fire in the engine compartment. Upon investigation by an independent auto mechanic, it was determined that the fuel line had become brittle and developed a crack that had sprayed fuel into the hot surfaces of the engine compartment. This appears similar to the scenario affecting earlier Kia Optima models with the 2.0L Turbo engines. The heat from the fire caused the brakes to start to fail and the amber check engine light to come on within about 5 seconds before smoke was observed coming from the engine compartment. Fortunately, the fire occurred as the vehicle was pulling into the owner's driveway and a fire extinguisher was nearby and used to put out the fire. The vehicle's occupants were able to exit the vehicle with no injuries.

NHTSA ID

11702944

Incident

Dec 1, 2025

My vehicle is consuming oil excessively. I have to put a whole quart of oil in my vehicle every 2 weeks. I am adamant about getting regular maintenance oil changes as well. My car had to be towed to a local auto shop due to the engine stalling and accelerator not working. They had to replace all 4 coil packs and 4 spark plugs due to dark, tarry oil covering the parts. The repairman told me my engine was at risk of failing, and that the repairs he did would not last without a new engine. I am worried about the car stalling or failing while driving, which puts an accident occurring at greater risk. My complaints resemble symptoms tied to previous Hyundai/Kia engine recalls. I am requesting investigation and manufacturer action related to this issue.

NHTSA ID

11702596

Incident

Nov 22, 2025

2019 Kia Optima EX - 59,000 miles - car miss fires and shakes on start. After a few seconds the car calms down and I can drive. Very dangerous since the fuel can stop flowing and the car can stall at any speed. Very dangerous!! Looks like several Kia's from 2019-2023 have been recalled for the same issue - High Pressure Fuel Pump - if my car is having the same issue at 59,000 miles why is this car not recalled, Very Dangerous! The Kia K5 which took over for the Optima is on the list why not the Optima EX.

NHTSA ID

11690475

Incident

Sep 18, 2025

I was just driving then noticed lack of acceleration and the engine light flashing. Loosing acceleration mid driving posed a great safety risk because no other drivers would know the issue I was experiencing and risked causing an accident. The vehicle was taken for a fault code reading which indicated a knock sensor code, later it was inspected at the dealership who confirmed an ECU issue. The police or insurance have not inspected the vehicle for this particular issue.

NHTSA ID

11683345

Incident

Aug 24, 2025

The contact owns a 2019 Kia Optima. The contact stated that there was an abnormally strong fuel odor coming from the vehicle. The contact stated the fuel odor was stronger on the rear driver's side, where the gas tank was located. The used car dealer from whom the vehicle was purchased was notified of the failure. The vehicle was not diagnosed or repaired by an independent or dealer. The manufacturer was not notified of the failure. The failure mileage was approximately 95,658.

NHTSA ID

11662524

Incident

May 20, 2025

Mileage

95,658 mi

Oil is getting into cylinders causing spark plugs to misfire. Very high oil consumption so I have to put oil in it every other day in between oil changes. I’ve been to Kia Service department several times in the past 2 months.

NHTSA ID

11651683

Incident

Mar 31, 2025

Subject: Complaint Regarding Excessive Oil Consumption and Engine Hesitation in 2019 Kia Optima SX To Whom It May Concern, I am writing to formally lodge a complaint regarding my 2019 Kia Optima SX. Despite meticulous maintenance and care, I have been experiencing significant issues with the vehicle that are concerning, especially considering its relatively low mileage of only 107,000 miles. The primary issues are as follows: 1.Excessive Oil Consumption: My Kia Optima SX has been burning an excessive amount of oil, necessitating frequent top-offs well before the recommended oil change intervals. This is not only inconvenient but also raises serious concerns about the long-term health and reliability of the engine. 2.Engine Hesitation: The vehicle exhibits extreme hesitation during acceleration. This hesitation occurs sporadically, making it difficult to anticipate and presenting a potential safety hazard, especially when merging onto highways or attempting to overtake other vehicles. These issues are unacceptable for a vehicle with such low mileage and are not in line with the quality and reliability I expected when purchasing a Kia. Given the prevalence of similar complaints from other owners of the same model, it is evident that these are not isolated incidents but potentially indicative of broader manufacturing or design flaws. I urge the National Highway Traffic Safety Administration (NHTSA) to investigate these issues thoroughly. Owners of the 2019 Kia Optima SX should not have to endure such significant and potentially dangerous problems with their vehicles. Thank you for your attention to this matter. I look forward to your prompt action and response.

NHTSA ID

11592144

Incident

Jun 1, 2024

I currently have 119500 miles on my 2019 Kia Optima. I am losing oil somewhere between oil changes, and the car is beginning to hesitate while driving. I don't see oil on the ground but I have had to put in 2-3 1/2 quarts of oil way too often. For this to happen on some many vehicles, it must be a manufacturer defect. The hesitation just started and I'm taking it do get a diagnostic test. 11

NHTSA ID

11589707

Incident

Nov 1, 2023

I am writing to bring to your attention a critical safety issue with my 2019 Kia Optima SX 2.0 GDI Turbo, which has accumulated approximately 103,000 miles. This vehicle has recently developed several serious problems that I believe pose significant risks to both my safety and the safety of other road users. Firstly, my Kia Optima has been burning an excessive amount of oil. Specifically, it consumes over 5 quarts of oil within just 2,000 miles of driving. Despite thorough inspections, even from Kia Dealers there are no visible oil leaks, making this issue even more perplexing and concerning. Moreover, the vehicle has begun to shake violently while driving on the highway, which has led to a substantial loss of power in the middle of traffic. This unpredictable loss of power is extremely dangerous, especially at high speeds, as it compromises my ability to maintain control of the vehicle and poses a significant hazard to other motorists. Additionally, the car now emits a loud knocking noise, which appears to be related to the engine's internal components. This issue further exacerbates the vehicle's performance problems and raises serious questions about its reliability and safety. I urge the NHTSA to investigate these issues promptly. The problems I am experiencing are not isolated and may affect other Kia Optima owners, potentially leading to widespread safety risks. I believe it is crucial to determine if there is a manufacturing defect or other underlying cause that needs to be addressed to prevent accidents and ensure the safety of all Kia Optima drivers. Thank you for your attention to this matter. I am hopeful that the NHTSA will take immediate action to investigate these serious safety concerns and provide a resolution to protect both myself and others.

NHTSA ID

11588878

Incident

May 12, 2024

Burns through oil. I have to consistently have oil on hand. 107,000 miles and being told my year does not fall under getting a new engine falls on me to replace it. This is an issue that falls on the manufacturer. Please help

NHTSA ID

11584657

Incident

Apr 22, 2024

Our 2019 Kia Optima has now stalled twice at a stop light in the past year. When it happens, we're able to restart the engine. In addition to stalling, the car struggles to start on some days and runs lumpy (minor surges in power) on other days. The symptoms match a problem Kia is aware of and for which it has provided an extended warranty (15 years/150,000 miles). Below is the wording from the extended warranty letter (2016-2020 MY Kia Optima Vehicles Low-Pressure Fuel Pump New Vehicle Limited Warranty Extension dated Sept 9, 2022): "If, at any time within the extended warranty period, you experience intermittent reduction in engine power, stalling while at idle, and/or inability or difficulty starting your engine, your authorized Kia dealership will diagnose the cause at no cost to you." When I took the car in after both incidents, the Kia dealer is not able to replicate the issue because it's an intermittent issue. There is no fault code thrown by the vehicle computer. The dealer and I have separately called Kia to get authorization to replace the low-pressure fuel pump (the most likely culprit), but Kia has denied the request because the dealer isn't able to replicate the issue. This is non-sensical given the fact that Kia in its letter admits that this problem is intermittent. I'm afraid that the next time the low-pressure fuel pump fails, it will be in a far more dangerous situation (e.g. highway) than at a stop light. I believe Kia should replace the low-pressure fuel pump for those owners who report the symptoms of a failing low-pressure fuel pump even if the failure can't be replicated at the dealer. Kia is basically saying they're not going to replace the low-pressure fuel pump until it malfunctions and stays broken which could very likely leave us stranded somewhere or worse without engine power in the middle of driving.

NHTSA ID

11578034

Incident

Mar 10, 2024

The morning of 9/26/2023 as I was driving on the freeway road and I experienced an intermittent reduction in engine power and had to pull over on the side of the freeway road. This was a very traumatizing experience and I was very lucky that I was not hit while awaiting to be towed. After my mechanic inspected my vehicle we received error code P1233 and advised me to call the dealership as this is something covered under an extended warranty. I scheduled an appointment for 9/27/2023 however, I dropped my car off on 9/26/2023 since I was able to arrange dropping it off a day earlier. I received a call very early on 9/27/2023 from Chuck, one of the mechanics at Westside Kia and he stated that my car was working perfectly fine. After I informed him of the issue I had he stated they would need to keep my car for about 48 hours until they could determine the issue. I received a call from Chuck on 9/28/2023 and he stated that the issue with my car was not covered under the extended warranty and that I would have to pay $1,200.00 to get the issue fixed. He agreed that the issue was in relation to the low pressure fuel pump and should be fixed at no cost however, he stated the only way this could be fixed is if they received approval from Kia Consumer Affairs. On 9/27/2023 I opened case number [XXX] and after a month they denied my case stating that they will not fix my car free of charge because the fuel pump needs to be replaced and the recall only takes care of replacing the filter and not the pump itself. I have argued with the dealership and Kia Consumer Affairs that if the fuel pump goes bad due to a bad filter that has been recalled then it is their responsibility to cover the cost. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11556499

Incident

Sep 26, 2023