2021 Kia Seltos: hesitation when accelerating

Filed Sep 10, 2026 · Electrical, Engine · FL

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. The dealership has now stated that Kia is requesting oil-change records and removal of the valve cover for further diagnosis. We perform our own oil changes. We were told that without service records the engine claim may be denied and that we could be responsible for approximately $878 in diagnostic charges if Kia denies coverage. I am concerned about operating the vehicle because the engine continues to malfunction and display the oil pressure warning despite being evaluated by an authorized Kia dealership. The vehicle is available for further inspection if requested.

Filed Aug 20, 2025 · Engine · 33,621 miles · PA

The contact's daughter owns a 2021 Kia Seltos. The contact stated that while driving at various speeds, the vehicle hesitated while depressing the accelerator pedal. There was no warning light illuminated. The vehicle was taken to a dealer, and it was acknowledged that the failure was a known issue. The dealer recommended that the vehicle no longer be driven and remain with the dealer for additional diagnostic tests. The vehicle remained with the dealer unrepaired. The contact then received notification of the federal safety agency Campaign Number: 25V099000 (Engine and Engine Cooling); which was linked to the failure. The contact stated that several attempts were made to reach the dealer and the manufacturer about the recall repair; however, an update on the repair was not yet provided. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The failure mileage was 33,621.

Filed Mar 12, 2025 · Engine · 70,000 miles · MA

The contact owns a 2021 Kia Seltos. The contact received notification of the federal safety agency Campaign Number: 25V099000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that while driving at various speeds, the vehicle stalled without warning. The failure intermittently occurred while idling at a stop light. While attempting to accelerate, the vehicle hesitated or lagged before accelerating. While driving out of a gas station, the check engine warning light illuminated, the vehicle stalled, and lost motive power. The vehicle was towed to the dealer who diagnosed that the oil piston rings had failed, and oil was leaking into the engine, causing the engine to fail. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The dealer informed the contact there were no parts for the recall repair available. The manufacturer was made aware of the failure and opened a case. The failure mileage was 70,000. Parts distribution disconnect.

Filed Jan 21, 2025 · Electrical, Engine · NY

When the auto engine start/stop button is on and I’m stopped at a light, the infotainment system will constantly restart as will the engine once I let go of the brakes. It usually happens when it is cold outside. This is a safety issue bc a lot of the time I am using the navigation and since the infotainment system just restarted I am waiting for the navigation to reboot and I am now driving without knowing where I am going. It doesn’t seem to happen when I turn off the auto engine start/stop button. Sometimes, I’ll be in an intersection, and the engine will restart bc the infotainment system restarted. Last time I almost got into an accident bc I was trying to accelerate but the car hesitated bc it restarted the engine and radio. There seems like there is a sudden loss of power. The dealer supposedly updated the software for the infotainment system but it did not correct the issue. There is no warning lamps or messages when this occurs

Filed Jul 7, 2024 · Engine, Fuel system · IL

This happens everyday while I’m driving. The vehicle hesitates and grinds when you try to accelerate and prevents you from going forward. It pulls the car back in yanking motion. Which is extremely dangerous.

Filed Aug 30, 2023 · Fuel system · CA

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. We were blocking traffic and my wife got out to direct traffic around us. I tried to put the car in neutral and coast towards an open curbside parking space. It wouldn't budge. We spent what felt like an eternity blocking traffic. It was probably 4-5 minutes where we were unable to start or roll backward.

Filed Aug 28, 2023 · Engine · 9,800 miles · NY

The contact owns a 2021 Kia Seltos. The contact stated while driving approximately 25 MPH, the engine seized. The contact stated that the vehicle hesitated when the accelerator pedal was depressed. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed and determined that the crankshaft had cracked, causing oil to leak from the vehicle. Additionally, there was an unknown sensor that was faulty. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 9,800.

Filed May 9, 2022 · Transmission · 4,700 miles · NY

The contact owns a 2021 Kia Seltos. The contact stated while driving 50 MPH, the transmission began to rev uncontrollably as the steering wheel started shaking without warning. The contact stated that the vehicle began to hesitate upon depression of the accelerator pedal and stalled without warning. The contact was able to coast the vehicle to a gas station and called the dealer to have the vehicle towed. Once the vehicle was towed to the dealer, the vehicle was diagnosed with transmission failure. The dealer and the contact notified the manufacturer of the failure but the manufacturer offer no assistance. The vehicle was not repaired and remained in the possession of the dealer. The failure mileage was approximately 4,700.