Which parts fail
Components named in complaints (fuel pump, injectors, fuel tank, hybrid and EV propulsion).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2021 Kia Seltos owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2021 Kia Seltos. The contact stated while driving 65 MPH, an object fell from a vehicle ahead. The contact stated that while attempting to switch lanes, the Blind Spot Detection system returned the vehicle back into the lane and the vehicle struck the object causing damage to the front mid-section of the skid plate. The vehicle was taken to the dealer however, the mechanic was unable to duplicate the failure or determine the cause of the failure. The contact stated that the failure persisted. Additionally, the contact stated that the transmission and fuel injectors had failed three times since owning the vehicle. Both parts were repaired twice under warranty; however, the contact was recently informed that the vehicle was out of warranty. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 10,000.
The contact owns a 2021 Kia Seltos. The contact stated that while stopped, the fuel-saving system would turn off the engine however, whenever the brake pedal was released, the engine failed to immediately restart. The contact then had to turn off and restart the vehicle. The failure had occurred on multiple occasions. The cause of the failure was not yet determined. The local dealer was notified of the failure. The manufacturer was not contacted or notified of the failure. The approximate failure mileage was 2,000.
I was driving the car at a speed of approximate 30 mph. As I was slowing down for a traffic light, the car jerked backwards. The car braking system engaged without me touching the brake. When I took the car in for service, I was told they could not duplicate the issue. I took the car in after receiving the recall. I was assured all was well with the car, though I was having issues with the car stalling out at traffic lights. I took the car in for service and was told by the manager that they could not duplicate the problem. I became so frustrated with the car that I insisted the manager get in my car and drive it with me until the problem presented itself again. He did and the car stalled out on him 2x. They kept my car for two weeks and called me to tell me that the car had no oil in it. …
My 2021 Kia Seltos SX Turbo (1.6L Turbo engine) is experiencing severe, excessive oil consumption, burning (and heavy smoke ) approximately 1 to 2 quarts, (Kia dealer oil change standard amount) of oil every 1,000 miles without any external visual leaks. A formal diagnosis by a certified Kia dealership confirms that heavy carbon buildup has accumulated around the piston rings, causing severe ring distortion. Because the oil rings are stuck and distorted, the engine is bypassing oil directly into the combustion chamber and burning it. This exact physical failure mode-carbon buildup causing piston oil ring failure-is identical to the defect described in NHTSA Recall 25V099 (Kia Campaign SC336) for the 2.0L Seltos models. However, my vehicle is currently excluded from safety remedies due to its 1.6L Turbo engine variant. …
My 2021 Kia Seltos is experiencing engine sputtering/hesitation at approximately 3,000 RPM and the low oil pressure warning light illuminates while the vehicle is stopped or idling. The vehicle has been taken to an authorized Kia dealership for diagnosis. The dealership opened a Kia Techline case and advised us that the vehicle passed Kia's piston-related test, but the symptoms remain. The vehicle is affected by Kia safety recall SC209, which concerns improperly heat-treated piston oil rings that may damage the engine. Kia's recall documentation identifies illumination of the oil pressure warning lamp as one of the potential symptoms/consequences of this defect. Despite the continuing symptoms, including the oil pressure warning light and sputtering at approximately 3,000 RPM, the problem has not been repaired. …
I've owned this car since it was new. I've been disappointed with the transmission. At low speeds, it will hesitate and shudder. This is especially true if I'm making a turn. This has been a consistent problem. Secondly, twice my transmission has overheated. The first time we were in a Halloween event during the Pandemic 2020. It was a drive-through event that was stop-and-go. The warning light came on with the gauge showing one bar over the limit. As luck would have it, the traffic started to move towards the end and it lowered the bar to just under the overheating bar. The second time this happened it was much more serious. I had four people in the car. We had just left a restaurant and were heading towards the freeway. Unfortunately, we got stuck on a hill in Hollywood Bowl traffic. We were stuck there long enough that my car shut down on the hill. …
A Unknown component has failed with the vehicles fuel system. The service center at the Kia Dealership was unable to clear the associated Check engine light after numerous attempts. This is the Third time I tuned in for this same reason. The First time they attempted to resolve by replacing O2 sensor. After a Few weeks the Check engine light returned. Then I was told it was my Spark plugs. After one trip from dealership to home the check engine light appeared again. I returned to service center and it has been there for over a Month. Kia corporate scheduled a Tech to come and Assist with the problem. I am deeply concerned that my safety may be at risk for a Faulty fuel system that may fail while I'm in route to work. I work for the Utility 74 miles away from home and I am an Essential worker to the great city of New York. …
Severe Safety Hazard, Corporate Negligence, and Delayed Repair: * After picking the vehicle up following the secondary service, a heavy, toxic smell of raw gasoline began pouring directly through the cabin's HVAC vents while driving. * I immediately called the dealership. A representative consulted a technician and dismissively told me that the "engine just needed to be broken in." * Acting on this negligent advice, I continued operating the vehicle. My [redacted] son rides in this car daily. Due to inhaling raw fuel vapors, both my toddler and I suffered acute physical distress, experiencing severe headaches and dizziness. * On [redacted] I returned the vehicle to Kia of Greenville to demand an inspection regarding the toxic fumes. The dealership finally admitted that a fuel ring was broken, exposing my cabin to hazardous vapors. …
I pulled off the main road into the Walmart parking lot. When I did, the vehicle shut off, no power and steering was very hard. I was able to steer into a space and safely park. Vehicle was towed to Victory Kia in Victoria. Service dept said there was no oil at at all in the vehicle. Vehicle was recently taken in for the Kia engine recall about 3 months ago. Was told I needed an software update and oil change to remedy the problem. I got a full synthetic oil change. The vehicle burned all the oil off. No low oil or oil warning light ever came on. Now, Kia wants me to pay for another oil change and diagnostic and drive the vehicle for 1000 miles to see the outcome. Which, if/when the motor dies out again,then I'll be stranded again, hopefully not on a freeway this time. …
The vehicle was sputtering and then shut off and would not start. I called KIA and had it towed to Dealership. They called several days later stating there was nothing wrong with the vehicle. Then several weeks later getting on the turnpike it sputter and shut off. I was able to get it started again and repeated the same sputter and shutting off an additonal 2 times on the turnpike. I was able to get the vehicle home to my drive way. The tow truck came and could not get it to start. He towed it back to the dealership. This time they replaced the fuel injector. The mechanic advised KIA that this issued caused scoring on the cylinders. KIA authorized replacing the fuel injector. KIA claimed scoring on the cylinders is normal. You don't have to be a mechanic to know this is. not normal and over time will lead to engine failure. KIA will not replace the engine. My case # is 15929784
Fuel System complaints in other Seltos years
Frequently asked questions
How common are fuel system problems on the 2021 Kia Seltos?
NHTSA has 28 complaints about the fuel & propulsion system of the 2021 Kia Seltos, 7% of the model year's 378 complaints. The component named most often is fuel injection system (1 mentions).
Is there a recall for 2021 Kia Seltos fuel system problems?
No. NHTSA lists no fuel & propulsion system recall for the 2021 Kia Seltos, though it has 2 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2021 Kia Seltos fuel system problems start?
Half of the complaints with a recorded mileage happened before about 9,000 miles, and 100% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.