Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2017 Kia Niro owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2017 Kia Niro. The contact stated that while driving approximately 60 MPH, there was smoke coming from the rear of the vehicle. The message, "Turn Off the Vehicle and Stop" was displayed, and the transmission failure warning light was illuminated. The contact pulled over and turned off the vehicle. Once the vehicle was turned off, the smoke dissipated. The vehicle was towed to the dealer, who diagnosed that there were holes in the engine, power steering, and there was an engine oil leak. The engine, transmission, and battery were replaced. However, 2 months later, the contact attempted to start the vehicle; however, the vehicle failed to start. The vehicle was scheduled to be towed to another dealer, Buster Miles Kia (1401 S Quintard Ave, Anniston, AL 36201). The vehicle was not diagnosed or repaired. …
The contact owns a 2017 Kia Niro. The contact stated that while operating the vehicle, the message "Engine Overheated - Turn Engine Off" was displayed with white smoke coming from the exhaust system. Upon inspection, it was discovered that the coolant level was extremely low. The contact stated that coolant was added to the reservoir; however, hours later the coolant level was low again. The vehicle was towed to the local mechanic, who diagnosed the vehicle and determined that the head gasket was blown and that the engine needed to be replaced. The vehicle was not repaired. The manufacturer and local dealer were not notified of the failure. The failure mileage was 112,000.
The contact owns a 2017 Kia Niro. The contact stated that while her son was driving at an undisclosed speed, he noticed white smoke coming from the exhaust. The contact stated that her son pulled over to input more coolant however, upon starting the vehicle, the coolant immediately drained from the reservoir. Additionally, the contact stated that a burning odor could be detected throughout the vehicle. No warning light was illuminated. The vehicle was taken to the dealer where it was diagnosed that a hole was in the exhaust and needed to be replaced. The manufacturer was not notified of the failure. The failure mileage was approximately 97,000. The VIN was not available.
The contact owns a 2017 Kia Niro. The contact stated that while driving 60 MPH on the highway, the vehicle jolted and shook abnormally. The electrical system warning light illuminated, and the vehicle lost partial power. The engine and hybrid warning lights were illuminated. The vehicle was coasted off the roadway to a gas station. The vehicle was towed to the local dealer, where it was diagnosed with a blown high-voltage fuse. The vehicle was repaired with a higher voltage fuse. The manufacturer was contacted and opened a case. The approximate failure mileage was 101,000. The VIN was not available.
The contact owns a 2017 Kia Niro. The contact stated while driving 35 mph, the vehicle stalled without warning. The contact took the vehicle to the local dealer, where the vehicle was being serviced. The vehicle was not yet diagnosed nor repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 94,000.
I was driving and the car was stuttering. Then after I stopped for a bit it resumed normal operations. Then the warning light came on, then it went off again. This happened for a couple of weeks until finally, while on a road trip at the end of July 2023, the car seemed to just lose power in 4th gear and I would have to really rev the engine just to keep it moving, that happened while on a road trip. I called the dealership several times during the trip and they said I'd already had the computer recall reset so they didn't think it made any sense. I took it to my neighborhood repair shop when I got back and they said two spark plugs are shot, they replaced them and it ran fine. But now it's stuttering again, just a few months later. I called the dealership again and they said I could bring it it for a diagnostic (not free) and then I got a letter about a recall. …
I am unsure of what to say about my car. I saw a check oil light flicker and it went away. The car had oil when I checked on it so it didn't seem to be a problem. There was no sign of leakage and no sign of burning oil or fuel. Several days later, the check oil light came on permanently. Before I could get the car anywhere, the car started making a strange sound. I took it to my usual shop. They said it had sprung a spontaneous leak. They said it was a large oil pressure switch leak. They replaced the sensor and added oil. They said there was some damage but that the car was still drivable. I drove the car for a week and then when I was on the highway, the car starting roaring and shaking like I was in an earthquake. The check engine light started blinking. I could not accelerate properly and had to coast to safety on the electric. …
I received a warning indication that the engine temperature is too hot while driving the vehicle to work. I opened the hood of my vehicle and discovered the vehicle's coolant reservoir was empty which led me to believe there was a coolant leak. I took the vehicle to be inspected and diagnosed by an independent repair shop (non-dealership) and it was explained that there was in fact a coolant leak and it's because the exhaust heater exchanger is failing. This is a serious safety concern because if there is a coolant leak the vehicle's engine can overheat causing further and extensive damage to the engine which could result in a fire. Based on research, there have been other cases where this particular year/model vehicle has had or is experiencing issues with the exhaust heater exchange failing. …
I am experiencing engine issues with my 2017 Kia Niro Touring Launch Edition at approximately 111,000 miles, including engine hesitation and lack of acceleration, along with engine code P0011. These symptoms started suddenly and have made highway driving difficult and potentially unsafe, as I was recently in the mountains unable to exceed 35 mph. This appears to be a widespread issue among 2017 Kia Niro owners, with many reporting CVVT (Continuously Variable Valve Timing) or solenoid failures around 100,000 miles shortly after the powertrain warranty expires suggesting a pattern of premature failure. My car was purchased certified preowned and is still within the 10 year timeframe. No official recall currently exists for this issue, but it should be investigated. …
-Car was leaking or burning coolant causing engine to overheat. -Car was diagnosed with: Exhaust heat exchanger is leaking coolant and needs to be replaced. After costly repair, car continued to leak coolant and overheated. -Car was taken back to the dealership and diagnosed with: Engine Assembly - Long Block - Replace | Engine long block needs replacement due to coolant in the oil. This was at a certified Kia Dealership. No insurance reps or police were involved. An engine light has come on a couple of times over the years that was interpreted to mean replacing the gas cap. After replacing the gas cap, the engine light didn't come back on. My safety was impacted as a person living in a cold, rural state to have a sudden mechanical failure where I couldn't run the heat and had to stop the car immediately.
Engine complaints in other Niro years
Frequently asked questions
How common are engine problems on the 2017 Kia Niro?
NHTSA has 33 complaints about the engine & cooling of the 2017 Kia Niro, 40% of the model year's 82 complaints. The component named most often is exhaust system (1 mentions).
Is there a recall for 2017 Kia Niro engine problems?
No. NHTSA lists no engine & cooling recall for the 2017 Kia Niro, though it has 4 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 2017 Kia Niro engine problems start?
Half of the complaints with a recorded mileage happened before about 97,000 miles.
Is it dangerous?
Owners linked 0 crashes, 2 fires and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
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.