There are 9 owner-reported engine complaints for the 2019 Kia Niroin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact owns a 2019 Kia Niro. The contact stated that while driving at an undisclosed speed, the vehicle stalled in the middle of the road. The vehicle was successfully restarted and moved over to the side of the road. The vehicle was towed to an independent mechanic, where it was diagnosed with a blown head gasket, a misfire in the engine, and coolant mixing with the engine oil; however, the vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 118,000.
I have a Kia Niro Hybrid. I had the check engine light come on. I took it to Kia dealership in Cicero, NY (Driver's Village/ Burdick Kia. Upon inspection, the dealership stated the following: "CONFIRM CUSTOMER CONCERN CEL ON, P0401 EGR INSUFFICIENT FLOW EGR PORT BECOMES CLOGGED AT HIGH MILEAGE, EGR REPLACEMENT WOULD CORRECT LIGHT TEMPORARILY HOWEVER CASUAL CONDITION WILL STILL REMAIN, CLOG IN EGR FROM ENGINE ITSELF. LONG BLOCK REPLACEMENT MAY BE NEEDED FOR FULL CORRECTION OF CONDITION"
The contact's customer owns a 2019 Kia Niro LX. The contact stated that his customer stated that the vehicle overheated. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic who replaced the converter. The vehicle was repaired, but the failure recurred. The owner stated that the vehicle was randomly stopping. The vehicle was taken back to the independent mechanic. While test driving at 15 MPH, the brakes were operating as designed, and then after several attempts, the brake pedal was applied and depressed to the floorboard, and the driver crashed into a parked BMW X5. There were no warning lights illuminated. The brakes were inoperable. The air bags deployed. There were no reported injuries, fire or police report filed. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was not notified of the faikure. The failure mileage was approximately 144,800.
The contact owns a 2019 Kia Niro. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to an independent mechanic, who determined that there was a misfire in cylinder #1. The vehicle was not repaired. The vehicle was then taken to the dealer, who diagnosed a failure with the cylinder #4 injector. The dealer also informed the contact that the clutch needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 32,000.
Service bulletin eng212. 4th cylinder misfire. Diagnostic has been done at Dennis Dillon 9501west Fairview ave Boise id 83704. Engine shaking when increasing speeds above 30 mph. Started without warning while driving. It was recently serviced for routine items on October 16th 2024. On November 5th it had diagnostic performed. Check engine light and display showed automatic diagnostics, engine control system, possible engine condition. I was on my way to vote. Yes it is available for inspection. I am currently not driving it but unsure what to do with it since the value of the car and amount of repairs needed are close in range.
The contact owns 2019 Kia Niro. The contact stated that on several occasions when the vehicle was started, the check engine warning intermittently illuminated. The contact stated that while driving and accelerating, the vehicle lost motive power momentarily. The vehicle was taken to an independent mechanic and DTC: P074A, P1921, P074A/73, and P1921-77 were retrieved. The vehicle was taken to a dealer where it a diagnosed and determined that the transmission gear actuator needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 75,000.
The contact owned a 2019 Kia Niro. The contact stated while driving at an undisclosed speed, the contact noticed a ticking and a popping sound coming from the vehicle. The contact's friend who was following behind noticed white smoke coming from the exhaust pipe. The vehicle was driven to the destination. The following day, the oil level was checked, and the contact stated that the oil level was low; however, there was no sign of an oil leak. The contact stated that when the vehicle was started and made a rattling sound. The contact turned the vehicle off and the vehicle was towed to an independent mechanic where it was diagnosed with a hole in the crankcase. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 120,000.
THE PROBLEM THAT I'M I'M HAVING IS A CODE P0456 (EVAPORATIVE EMISSION SYSTEM LEAK DETECTED, WHICH IS A SMALL LEAK. THE REASON WHY I'M WORRIED IS BECAUSE THE GAUGE FOR THE RPMS GOES ALL THE WAY ACROSS AS FAR AS IT CAN GO, IN OTHER WORDS IT'S LIKE AS IF I'M PUSHING DOWN ON THE GAS PEDAL AS FAR AS IT CAN GO , IT DOES THIS WHEN I'M DRIVING ON THE HIGHWAY, WHEN I'M ABOUT TO LEAVE A SIGNAL LIGHT FROM A COMPLETE STOP , WHEN I'M DRIVING UP A HILL IS WHEN IT'S WORST.
FIRST THE AIR CONDITIONER STOPPED WORKING FOR 2 DAYS. THEN ON THE 3RD DAY, 8/13/19, THE HEV LIGHT AND OIL LIGHTS WENT ON. THE ENGINE SLOWED DOWN. THE CAR WAS TOWED TO THE KIA DEALERSHIP IN ONTARIO, CA. INITIALLY THEY SAID IT MAY NOT BE COVERED BY WARRANTY. THEN ON 8/17 THEY TOLD ME THE AIR CONDITIONER NEEDS A NEW COMPRESSOR. THEN ON 8/23 I WAS TOLD THAT OIL AND METAL SHARDS HAD LEAKED INTO THE ENGINE AND THE ENTIRE ENGINE NEEDS TO BE REPLACED. IT IS UNKNOWN WHEN THE REPAIR WILL BE DONE.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026