KIA K4 problems

Owners have filed 101 complaints about the KIA K4 with NHTSA across model years 2025 to 2026. More of them are about the driver assist & collision avoidance than anything else.

Every KIA K4 year, graded

The grade compares each year against the rest of this model's own run — never against another car. Click any bar or row to open that year's report.

87 14

25 26

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

Year	Grade	Complaints	Crashes	Fires	Median miles	Most reported
2026	—	14	4	0	—	Driver Assist & Collision Avoidance
2025	—	87	21	0	1,300	Driver Assist & Collision Avoidance

What breaks on a KIA K4

Across every model year on file. Follow a row for that part's complaints and the year it was worst.

Driver Assist & Collision Avoidance 28 27.7%

Worst in 2025

Other & Unspecified 14 13.9%

Worst in 2025

Electrical System 13 12.9%

Worst in 2025

Engine & Cooling 9 8.9%

Worst in 2025

Steering 8 7.9%

Worst in 2025

Transmission & Drivetrain 7 6.9%

Worst in 2025

Airbags 6 5.9%

Worst in 2025

Acceleration & Cruise Control 5 5.0%

Worst in 2025

Brakes 2 2.0%

Worst in 2025

Fuel & Propulsion 2 2.0%

Worst in 2025

Tires 2 2.0%

Worst in 2025

Wheels 2 2.0%

Worst in 2025

Body & Structure 1 1.0%

Worst in 2025

Suspension 1 1.0%

Worst in 2025

Complaints filed over time

Every complaint about every KIA K4, by the month it reached NHTSA.

Mar 2025 peak 14 Aug 2026

Compare the KIA K4

Side by side on complaint history. Remember that raw totals track how many were sold as much as how good they were.

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