2018 Kia Niro Engine cooling Problems
- Complaints
- 1about this part
- Share
- 2%of 60 total for the year
- Median mileage
- 74,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2018 Kia Niro, 2% of the 60 complaints for this model year. Where a mileage was given, the median is 74,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owns a 2018 Kia Niro. The contact stated while driving approximately 65 MPH, the vehicle started shaking and vibrating abnormally. The contact stated that the accelerator pedal was depressed; however, the vehicle failed to respond as needed. The contact stated that the message Engine Overheating - Request Service Now and Engine Control System was displayed. The contact had taken the vehicle to an independent mechanic where it was diagnosed and determined that coolant had intruded into the engine block and the engine needed to be replaced. The vehicle had not been repaired. …”
NHTSA complaint #11547172, filed 2023-09, 74,000 milesRelated service bulletins
- 10220346Sep 16, 2022TECHNICAL SERVICE BULLETIN: MAINTENANCE REMINDER FEATURE - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated…
- 10212200May 19, 2022PITSTOP: RANDOM MISFIRES/OVERHEATING DUE TO LOW COOLANT - This Pitstop provides information to help identify one cause of low coolant, random misfires, and/or possible…
- 10209438Mar 1, 2022TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of…
- 10206642Jan 6, 2022TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of…
- 10205426Dec 21, 2021TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of…
- 10203456Nov 5, 2021PITSTOP: NO START / NO DTC WITH KEY IGNITION - This Pitstop provides information to help troubleshoot a "no start" symptom on some 2017-2022MY Niro LX HEV (DE HEV) vehicles with…
- 10201616Sep 27, 2021PITSTOP: ENGINE OVERHEATING IN NIRO HEV/PHEV - This Pitstop provides information to help troubleshoot an overheating symptom on some 2017-2022MY Niro HEV (DE HEV) and 2018-2022MY…
- 10201158Sep 1, 2021TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of…
- 10188137Feb 24, 2021PITSTOP/TECHNICAL OPERATIONS - SMOKE MACHINE NOT TO BE USED FOR EMISSIONS TESTING WITH HEV/PHEV MODELS - This Pitstop provides information to properly test the evaporative…
- 10183333Nov 25, 2020TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR OF C-MDPS MOTOR, ECU, WORM GEAR AND/OR STEERING COLUMN HOUSING - This bulletin has been revised to include additional information…
Engine cooling: other model years
Other parts of the 2018 Kia Niro
19 complaintsElectrical system
18 complaintsEngine
17 complaintsOther or unknown
11 complaintsBrakes
6 complaintsVehicle speed control
4 complaintsBody and structure
3 complaintsExterior lighting
2 complaintsFuel system
2 complaintsAir bags
1 complaintsSeats
1 complaints
← All problems reported for the 2018 Kia Niro
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology