2021 Kia K5 Engine cooling Problems
- Complaints
- 3about this part
- Share
- 2%of 169 total for the year
- Median mileage
- 45,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 2021 Kia K5, 2% of the 169 complaints for this model year. Where a mileage was given, the median is 45,000 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 owned a 2021 Kia K5. The contact stated that while driving at an undisclosed speed, the vehicle stalled. The failure was a recurring failure. The message Not Emissions Ready was displayed. The vehicle was towed. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 20,000.”
NHTSA complaint #11759133, filed 2026-08, 20,000 miles“The contact owns a 2021 Kia K5. The contact stated that the check engine warning light remained illuminated with DTC: P0471 displayed. The vehicle was included in NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline) and was taken to the dealer for the recall repair where the dealer replaced the check valve. After receiving the recall repair, the check engine warning light remained illuminated with DTC: P0471 displayed. …”
NHTSA complaint #11720629, filed 2026-02, 52,000 miles“The contact owns a 2021 Kia K5. The contact stated that while driving approximately 45 MPH, the vehicle jolted forward three times and then lost power. The contact stated that while driving at approximately 60 MPH, the check engine warning light illuminated. The contact steered the vehicle into an independent mechanic and the vehicle was inspected, and there was oil all over the engine compartment. The vehicle was taken to a dealer, where it was diagnosed, and determined that an unknown sensor was inoperable and needed to be replaced. …”
NHTSA complaint #11721805, filed 2026-03, 45,000 milesRelated service bulletins
- 10253806Apr 30, 2024TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: FUEL TANK AND/OR PCSV CHECK VALVE INSPECTION/REPLACEMENT + ECU SW UPGRADE (SC288) - This bulletin provides…
- 10253800Apr 30, 2024VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC288) - This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign…
- 10253805Apr 29, 2024Sc288_stkr: voluntary emissions service campaign completion sticker
- 10253803Apr 29, 2024VOLUNTARY EMISSIONS SERVICE CAMPAIGN: QUESTION AND ANSWER (SC288) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the…
- 10253802Apr 29, 2024Sc288_poc: proof of correction card
- 10253799Apr 29, 2024VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (SC288) - This document is the announcement to the dealer Parts and Service Managers that Kia is…
- 10253798Apr 29, 2024PRODUCT IMPROVEMENT CAMPAIGN: DEALER PRINCIPAL MEMO (SC288) - This document is the announcement to the dealer principals that Kia is conducting a Voluntary Emissions Service…
- 10234602Apr 19, 2023PITSTOP: COOLANT RESERVOIR OVERFLOW PORT - This Pitstop provides information regarding the presence of engine coolant residue found on the coolant reservoir of some 2021-2023MY…
- 10222116Sep 20, 2022PITSTOP: POTENTIAL LOW OIL PRESSURE DUE TO FILTER DRAIN PLUG THAT WAS LEFT IN FILTER - This bulletin has been revised to include additional information. New/revised sections of…
- 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…
Engine cooling: other model years
Other parts of the 2021 Kia K5
57 complaintsElectrical system
46 complaintsOther or unknown
32 complaintsEngine
30 complaintsTransmission and drivetrain
19 complaintsAir bags
10 complaintsBrakes
10 complaintsBody and structure
10 complaintsForward collision avoidance
9 complaintsLane departure
9 complaintsSeats
8 complaintsSteering
7 complaints
← All problems reported for the 2021 Kia K5
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