2020 Kia Niro Engine Problems

AC not working, recall SA512 is needed, Kia wont cover the cost of replacing electrical components. Thermal Runaway / Fire Risk: The broken compressor prevents the battery thermal management system from cooling the main high-voltage lithium-ion battery package, creating an overheating hazard during driving or DC fast-charging. Sudden Loss of Power (Motive Power): Battery overheating can trigger a sudden "safe mode" or turtle mode, dropping your speed to zero unexpectedly on the highway.Impaired Driver Visibility: The lack of functional cabin heating prevents windshield defrosting, severely impairing the driver's ability to see the road safely.

NHTSA ID

11755319

Incident

May 23, 2026

I had my oil changed in Dec. 2025. I drove 1000+ miles w/no issue. Engine suddenly seized w/no engine light warning. Oil dumped all at once. Kia refuses to cover under warranty. THIS HAPPENED TO MY CAR: NTSA announced it had launched an investigation into Hyundai Motor Company and Kia Motor Company for problems with their oil pans and oil drain plugs... consumers have filed complaints their engine’s oil drain plug falls out, causing all the oil to drain out of their engine while driving. In multiple tests the oil drain plug was tightened according to factory torque specifications and the tightening was well documented. Yet, testing shows in multiple cases that while driving, the oil drain plug falls within a few thousand miles after the service. In those cases, the crankcase drained completely. The Hyundai and Kia drain plug falls out due to inferior oil pan material and the drain plug gasket. The testing and investigations appear to show that the oil drain plans are made with THIN METAL AND THE DRAIN PLUG MOUNTING IS POORLY REINFORCED. In addition, the oil pan is coated with a thick paint coating the bonds the gasket to the pan, so the gasket does not come off when the drain plug is removed. That gasket issue alone is not why the oil drain plug falls out, but it is a factor in the chain of events. The oil pan is the biggest problem Apparently, the thin metal, along with engine vibrations and expansion/contraction tend to loosen the drain plug without any other intervention. NHTSA is investigating this as a factory defect ... The problem is two-fold. First, even if the repair shop properly torques the drain plug, the oil drain plug falls out on its own. The customer then blames the shop for shoddy workmanship. Second, Hyundai and Kia dealers are telling customers that servicing their vehicle at an aftermarket shop automatically voids their factory warranty. This is totally false & actually illegal under the terms of the Magnuson-Moss Warranty Act.

NHTSA ID

11733521

Incident

Mar 8, 2026

Engine Seized at 79,000 miles on Kia Niro Hybrid on 3/8/2025. Oil was changed at 78,225 miles on 12/16/2025. No issues with vehicle until approx. 1,000 miles later and just a month and a half later when car suddenly lost power on a highway forcing me to try to safely and quickly navigate off the road. This could have caused risk to my life and other lives. The car could not be restarted. Kia said the drain plug was not screwed on and is refusing to honor warranty despite no issues with the oil change. Notably, in October 2022, the National Highway Traffic Safety Administration (NHTSA) announced it had launched an investigation into Hyundai Motor Company and Kia Motor Company for problems with their oil pans and oil drain plugs. Specifically, consumers and aftermarket service facilities have filed complaints their engine’s oil drain plug falls out, causing all the oil to drain out of their engine while driving. In multiple tests the oil drain plug was tightened according to factory torque specifications and the tightening was well documented. Yet, testing shows in multiple cases that while driving, the oil drain plug falls within a few thousand miles after the service. In those cases, the crankcase drained completely. [XXX] This issue should be investigated for potential recall to keep drivers, passengers safe on our highways. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11726377

Incident

Mar 8, 2026

AS AT 11/07/2023 KIA AMERICA KNEW OF HCV/HYDRAULIC CLUTCH ACTUATOR -HEV/HYBRID ELECTRIC VEHICLE CAUSED TRANMSISSION PROBLEM IN KIA NIRO HYBRID 2020 AND KIA AMERICA REFUSED TO REPAIR IT. RECALL COMPLETED 5/27/2025 AFTER POWER TRAIN WARRANTY EXPIRED.

NHTSA ID

11697442

Incident

Nov 7, 2023

The contact owns a 2020 Kia Niro. The contact stated that the oil change due in 700 miles message was displayed. The contact stated while driving 55 MPH to have an oil change performed, oil change service at 55 MPH, the contact heard an abnormal popping sound. The contact stated that the low oil pressure warning light became illuminated. The contact stated while approaching the Auto Shop for the oil change, the vehicle lost motive power and made another abnormal sound. The independent mechanic informed the contact that the engine might have failed and referred the contact to the dealer for assistance. The vehicle was towed to the dealer, where the contact was informed that the oil plug had separated, causing a significant oil leak and engine damage. The dealer determined that the engine needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 70,500.

NHTSA ID

11665324

Incident

Jun 3, 2025

Mileage

70,500 mi

What component or system failed or malfunctioned, and is it available for inspection upon request? The component that failed was the Hydraulic Clutch Actuator, which is part of the hybrid transmission system. This component was already replaced in May 2024 under recall SC276, but it failed again. The vehicle is available for inspection upon request. How was your safety or the safety of others put at risk? The failure significantly affects the vehicle’s drivability. The most noticeable issue is a loud, explosive-like sound during operation and a slipping sensation, especially when braking at low speeds on city streets. The vehicle feels unstable and difficult to control during these episodes. This creates a serious safety risk for me and for others on the road. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, it was inspected by a Kia dealership authorized by the manufacturer as part of recall SC276 in Colorado. It was later inspected again in February by Kia Serramonte in California for the same issue, but the problem still persists. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No, there are currently no warning lights illuminated. However, the vehicle shows abnormal behavior such as jerking, loss of power, and a noise similar to an explosion. These symptoms first appeared before the recall in 2024, and then reappeared in August 2024, just a few months after the repair until now. Due to financial limitations, I was only able to take the vehicle in for service in November 2024, and finally left it at the dealership in February 2025. The so-called “repair” lasted two months, but the dealership refused to take responsibility. I had to pay $3,188 out of pocket, and even after that, nothing was fixed — the vehicle remains defective.

NHTSA ID

11657864

Incident

Apr 29, 2025

2020 Kia Niro was driving fine until one day while driving down the highway at highway speeds (65-70 mph), the car began to lose power and as we switched lanes to get to the side of the highway, the car began to smoke and caught on fire. Our safety was at risk due to the car catching on fire. The problem is unable to be reproduced as the car is a total loss. Vehicle was inspected by police at the scene. There were no warning lights, and the vehicle had been in working condition prior to the incident. The vehicle had a recall that was fixed at our local Kia dealership as soon as a solution was indicated, and the part was located.

NHTSA ID

11640082

Incident

Jan 18, 2025

My vehicle was the victim of attempted theft and reported to City of Cincinnati police 8/11/23. It then underwent repairs and delays before it was returned to me on 9/22/23. The left side rear door is basically detached from the system, causing the alarm to go off or not even work. The back seat lock is completely malfunctional, and there is glass remaining inside the car. I was informed by two separate Kia locations that they would contact me about repairs. On 9/29, notice attached here, I was informed that when a remedy is available, they will repair and cover the costs. No one has contacted me, and I have called multiple times over the last several months, including leaving voicemails, asking for any updates. I have phone logs I can provide as well. NOTE: The "Upload Files" button is not working below. Each time I click it, it just vanishes. This makes it impossible to attach anything.

NHTSA ID

11563391

Incident

Sep 29, 2023

My Niro has been having issues with sputtering, jerking, chugging, and feeling like it’s about to stall. Sometimes it happens right when I start the car and sometimes it happens while I am driving. The check engine light just started coming on yesterday. I believe the transmission is faulty and have spoken to or taken it to the dealer with this same issue multiple times as it is covered under warranty. They keep telling me that’s just how the car drives but in the 8 cars I’ve owned in my life, I have never had a car that behaves this way before. An internet search of “Kia niro transmission problems” proves that this is a common and known issue with this car that Kia is doing nothing to resolve. I have a daily 20 mile commute to work and feel incredibly unsafe driving my car and letting my teenage daughter drive it.

NHTSA ID

11485034

Incident

Sep 17, 2022

THE SERVICE ENGINE VALVE WITH "CHECK ACTIVE AIR FLAP SYSTEM" ERROR MESSAGE IS DISPLAYED. THE DIAGNOSTIC ERROR THAT COMES UP IS AAF - P059F. ACCORDING TO THE DEALER AIR COMPRESSION TEST WERE COMPLETED AND PROPERLY FUNCTIONING. I HAVE SUBMITTED 3 PICTURES WITH THE SAME ERROR MESSAGE CODE TO THE DEALER AND THEY STATE NOT ALL SAVED IN THE CAR'S ECM. THE LIGHTS CAME ON WHEN STARTING AS WELL AS WHILE DRIVING. NOTICED THAT THE CAR TAKES LONGER TO CHANGE GEARS OR GO INTO EV MODE.

NHTSA ID

11343051

Incident

Jul 17, 2020

Mileage

958 mi