2019 Kia Niro Engine Problems

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.

NHTSA ID

11727300

Incident

Mar 25, 2026

Mileage

118,000 mi

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.

NHTSA ID

11724340

Incident

Feb 8, 2026

The contact owns a 2019 Kia Niro. The contact stated while driving at an undisclosed speed, the vehicle jerked. The check engine warning light and the hybrid battery warning light were illuminated. The vehicle was taken to the dealer, where it was diagnosed and determined that the clutch actuator was leaking, and the dual clutch and slave cylinder needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure but denied assistance in covering the cost of the repair. The contact stated that the engine and dual clutch were replaced two years ago. The contact related the failure to NHTSA Campaign Number: 23V534000 (POWER TRAIN); however, the VIN was not included. The failure mileage was approximately 100,000.

NHTSA ID

11722353

Incident

Dec 5, 2025

Mileage

100,000 mi

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.

NHTSA ID

11669557

Incident

Aug 15, 2024

Mileage

75,000 mi

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"

NHTSA ID

11637525

Incident

Jan 16, 2025

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.

NHTSA ID

11634419

Incident

Dec 20, 2024

Mileage

144,800 mi

Car brought to dealership on 12/2 due to check engine light. scan showed cylinder 4 misfire. Car in shop for 1 week to fix cylinder head replacement. stated "operating as designed". Car returned to shop due to car turning off in the highway. All light were on. now showing hybrid system fault. Dealership had to open kia tech ticket [XXX]. CONFIRMED LIGHTS ON DASH, HYBRID SYSTEM FAULT. DTC SCAN FOUND MCU,BMS DTC'S. REMOVED CONNECTIONS FROM THE HPCU TO INSPECT WIRING AND FOUND CENTER PIN IS MELTED AND THERE IS THERMAL DAMAGE TO WIRING. P0A3E DTC, OPEN TA#[XXX] TA HPCU REPLACEMENT IS NEEDED. CABLE REPLACEMENT IS NEEDED. 1/6 - now advised another part is needed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11634268

Incident

Dec 2, 2024

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.

NHTSA ID

11631681

Incident

Dec 12, 2024

Mileage

32,000 mi

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.

NHTSA ID

11624965

Incident

Nov 5, 2024

The contact owns a 2019 Kia Niro. The contact stated while driving at an undisclosed speed, the vehicle inadvertently lost motive power with the message "Stop Engine". The check engine warning light was illuminated. The vehicle was towed to the dealer, who diagnosed failures with the hydraulic clutch actuator and catalytic converter. The catalytic converter was replaced, but the hydraulic clutch actuator was not repaired due to lack of part availability. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 23V534000 (Power Train); the VIN was included, but parts were not yet available. The manufacturer was notified of the failure and confirmed that the part was on backorder. The failure mileage was 87,000.

NHTSA ID

11620633

Incident

May 1, 2024

Mileage

87,000 mi

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.

NHTSA ID

11606590

Incident

Jul 26, 2024

Mileage

120,000 mi

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.

NHTSA ID

11255755

Incident

Aug 19, 2019

Mileage

5 mi

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.

NHTSA ID

11246151

Incident

Aug 13, 2019

Mileage

26,500 mi