Kia Niro loss of power problems

Filed Oct 30, 2026 · Engine · TX

Second failure of the EGR cooler on this vehicle in under 90 days. Kia's own Pitstop PS730 (May 2022) identifies internal leakage of the EGR cooler on 2017 to 2022 Niro HEV as the cause of coolant loss, random misfires, and overheating. First failure: coolant tracked through the intake into the cylinders, all-cylinder misfires and loss of power, repaired by Crain Kia of Fayetteville AR on RO 1436350, picked up September 4, 2026, customer paid $1,931.52. Second failure: on October 30, 2026 the same dealer confirmed on video that the replacement EGR cooler it installed September 4 had failed and was leaking coolant, under eight weeks after installation. Symptoms were sudden coolant loss and misfires on cylinders 1 and 4 while driving. The driver is a college student making 460-mile solo highway trips in this car. Loss of coolant and misfires at highway speed are a safety hazard. The failed component is at the dealer and available for inspection. Kia declined my first goodwill request on this repair under Kia Consumer Assistance case 26294863; a second request is pending following this repeat failure.

Filed Aug 6, 2026 · Electrical, Engine · VT

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.

Filed Mar 23, 2026 · Engine · NY

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 federal safety agency 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)

Filed Mar 14, 2026 · Electrical, Engine · NY

While traveling from upstate New York, the vehicle displayed an engine overheating warning shortly after startup while the engine was still cold. Because I was away from home, I stayed overnight and the next morning took the vehicle to a Kia dealership for inspection. The dealership inspected the vehicle and diagnosed a problem with the exhaust heat recovery system pipe. According to the service department, coolant is leaking internally through this component and is being burned in the exhaust system. The cooling system was pressure tested and held pressure externally, indicating the coolant loss is occurring internally through the exhaust heat recovery system rather than from an external leak. This condition can cause coolant loss and overheating while driving. If the engine overheats while the vehicle is in operation, it could create a safety risk due to sudden loss of power or engine damage. The dealership confirmed the diagnosis after inspection and testing and provided a repair estimate to replace the affected exhaust heat recovery system component. The overheating warning message was the first symptom observed prior to diagnosis. The problem was confirmed by the dealership after inspection and testing. This issue may indicate a defect in the exhaust heat recovery or thermal management system used in this hybrid vehicle, as coolant is entering the exhaust stream internally rather than leaking externally. If this type of failure occurs in other vehicles, it could lead to overheating while driving and potential engine damage.

Filed Jan 7, 2026 · Electrical · DC

The 12-volt battery system in my 2024 Kia Niro (VIN: [XXX] ) has suffered two total failures in under one year of ownership (approx. 10,000 miles). In both instances, the vehicle was completely unresponsive, with no power to essential systems. Safety Risks and Incidents: 1. [XXX]: Vehicle experienced a total power loss. It would not start and all electrical systems were dead. 2. [XXX]: Identical failure. These failures create a significant safety risk by potentially stranding the driver in hazardous locations and disabling critical safety systems, including hazard lights, power steering assist, and emergency braking. If a total power loss occurs while the vehicle is in motion, it could result in a sudden loss of motive power and control, posing an unreasonable risk of accidents or injury. Dealer/Manufacturer Confirmation: The problem was confirmed by Ourisman Kia of [XXX] ). The dealer replaced the 12-volt battery after identifying diagnostic code D04 ("Insufficient Battery Charge Condition Identified"). Despite proof of regular use (1,000 miles/month), Kia America has denied warranty coverage, claiming "insufficient driving". Warning Symptoms: There were no warning lamps or messages prior to either failure. The vehicle functioned normally until it became completely inoperable. I have since installed a third-party battery monitor to mitigate the risk of being stranded by a third failure. Evidence of Trend: A technician at the dealership noted a similar 12V failure in another new 2024 model (Carnival). Numerous other 2024 Niro owners report identical "parasitic drain" issues on the federal safety agency and consumer forums, suggesting a systemic manufacturing or software defect in the charging system. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Nov 28, 2025 · Engine · MI

The heat exchanger (exhaust heat recovery system) on my 2017 Kia Niro has been diagnosed by an authorized Kia dealership as leaking coolant. The failed component can be available for inspection upon request. This failure poses a serious safety risk. The heat exchanger is part of the vehicle’s cooling system, and when it leaks, the engine can rapidly lose coolant while driving. This can lead to sudden overheating, reduced power, or potential engine shutdown in traffic. A driver may not receive immediate warning, and if the vehicle overheats unexpectedly at highway speeds, it can put both the occupants and surrounding drivers at risk of a collision. Coolant leaking into the exhaust system can also create steam and white smoke that may impair visibility for the driver or other vehicles. The problem has been confirmed by a Kia dealership, which inspected the vehicle and provided a repair estimate of over $3,500 for heat exchanger replacement. The vehicle has not been inspected by the police or insurance representatives. In my case, there were no warning lamps or messages prior to the diagnosis. The vehicle did not illuminate a check-engine light related to the failure or coolant warning, meaning the failure could easily occur without the driver’s knowledge until the engine overheats or loses power while on the road. This lack of warning significantly increases the safety risk. Given the number of owners reporting identical heat-exchanger failures, the high repair cost, and the potential for sudden overheating or power loss, this appears to be a widespread safety-related defect that warrants investigation.

Filed Apr 30, 2025 · Electrical, Engine · CA

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.

Filed Feb 1, 2025 · Electrical, Engine · NH · fire

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.

Filed Jul 24, 2024 · Steering · GA

Niro had been exhibiting increasingly frequent "crunching" noises in the steering mechanism at lower speeds, like backing up and in-town driving. Issue started in late June 2024 at about 67K miles. A few times the steering wheel grabbed on turning and I had to fight it back. I called the dealer for a diagnostic appointment and they said they couldn't see it until mid-August 2024. I then took the car in to a local mechanic two times, who said they could feel the crunching on backing up, but weren't able to reliably reproduce the condition and refused to open up the steering column in the absence of a defined problem. I continued to drive car the throughout July. On 7/20/24, the crunching noise in the steering column got markedly more frequent, was witnessed and felt by passenger, and continued intermittently throughout the day through a number of short in-town drives at low speeds on typical city roads. The next day, 7/21/24, after about 1.5 hours of continuous highway, then local driving on curvy mountain road, a series of loud crunching noises suddenly came from the steering column, the EPS warning light came on, and I experienced a total loss of power steering, making the car extremely difficult to control. The failure occurred in a triple s-curve at the top of a hill with an approaching, very steep drop-off embankment and I was very scared I would not be able to keep it on the road, even at the low speed I was driving. It took both hands and considerable effort to wrest control of the wheel and to keep the car on the road, and I managed to drive the remaining two miles home with considerable effort and both hands forcefully steering the car through turns. Definitely NOT safe to drive in this condition. The car was towed to the dealer for diagnosis. Dealer confirmed "total failure of steering mechanism"

Filed Jun 29, 2024 · Driver assistance, Steering · NC

Last year, I purchased a new 2023 Kia Niro Hybrid and had a 24-month lease contract on it. After 9 months (5,700 miles), my car started having problems (Forward Collision Warning, random loss of power steering). My car had to be towed twice to a KIA dealership, where I was told nothing was wrong with my car. They finally agreed to run a scan on the electric syste, where they found a few communication issues. After doing a system update, KIA told me the problems were fixed, however, the car kept having the same problems plus a new one (random Automatic Emergency Braking). At this point, the car was too unreliable to drive so I returned it to my KIA dealership. Although the car clearly had problems that Kia couldn’t fix, I had to pay to get out of my lease and ended up buying another car, not a KIA. I am reporting the issues with the 2023 KIA Niro Hybrid to make sure people are aware of the issues on this particular car in case it is put on the pre owned market. I believe we’ve been very lucky not to get into an accident, my [XXX] drove it in the city and on the highway and I can't imagine what would have happened if the Automatic Emergency Braking would have gone off then. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)