2026 Kia K5 Engine Problems
- Complaints
- 4about this part
- Share
- 29%of 14 total for the year
- Median mileage
- 89miles
- Trend
- Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA recorded 4 complaints about the engine of the 2026 Kia K5, 29% of the 14 complaints for this model year. Where a mileage was given, the median is 89 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 display is shows a Check Oil Level error. It comes on then goes off regularly. I have verified that the oil level is OK. Took it into the dealer and he said that this is a common issue and a software fix is coming. The car only has less than 2K miles. I depend on the engine displaying error messages, but they need to be real ones. Online complaints indicate that this is a common error and there seems to be no fix.”
NHTSA complaint #11730905, filed 2026-04“The contact owns a 2026 Kia K5. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed with an engine harness failure. The contact was informed that the engine harness needed to be replaced. The vehicle was not repaired. The contact was informed that the parts were ordered and would be delivered within a week. The manufacturer was made aware of the failure. The contact was informed that the dealer would be contacted. The failure mileage was approximately 89.”
NHTSA complaint #11723870, filed 2026-03, 89 milesRelated service bulletins
- 11030380Mar 13, 2026TECHNICAL SERVICE BULLETIN: SERVICE ACTION: THETA III 2.5 GDI ECM SW LOGIC IMPROVEMENT (SA642) - This bulletin provides information to upgrade the Engine Control Module ‘ECM’…
- 11028738Feb 10, 2026TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC26) - This bulletin has been revised to include additional information. New/revised…
- 11027858Jan 28, 2026TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC26) - This bulletin provides information related to extracting “in use monitoring…
Engine: other model years
Other parts of the 2026 Kia K5
5 complaintsElectrical system
3 complaintsLane departure
2 complaintsAir bags
1 complaintsEngine cooling
1 complaintsForward collision avoidance
1 complaintsLatches, locks and linkages
1 complaintsTires
1 complaints
← All problems reported for the 2026 Kia K5
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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