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Kia K4Model year report

2025 Kia K4 Problems

Compared with other Kia K4 years

Too new to compare

Based only on NHTSA complaints, recalls and investigations. Not adjusted for how many vehicles were sold, and not a reliability rating. How this is calculated

Complaints
47filed with NHTSA
Median mileage
1,300miles, 5 complaints with mileage
Recalls
2campaigns on record
Trend
Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA crash rating
5 / 5stars overall
EPA fuel economy
33 mpgcombined, 2.0L 4-cyl FWD · 29 city / 39 hwy

Sources: NHTSA records for the 2025 Kia K4 (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error

NHTSA recorded 47 consumer complaints for the 2025 Kia K4. The part named most often is electrical system, with 14 complaints (30% of the total), followed by other or unknown (12) and transmission and drivetrain (8). 5 of the complaints include a mileage, and 60% of those were filed for vehicles with under 50,000 miles; the median is 1,300 miles. Of all complaints, 10 involved a crash, 8 an injury, according to the filers. NHTSA lists 2 recall campaigns and 19 technical service bulletins for this model year. Electrical system complaints overlap with 1 recall campaign and 13 technical service bulletins filed under the same part.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Fuel system (3), Brakes (2), Engine cooling (2), Wheels (2), Seats (1), Body and structure (1), Suspension (1), Tires (1).

Example complaints

Electrical system: “I'm not sure what's going on. It's telling me to start stop the car when it's running and then it will turn off and go into accessory mode even when I'm driving that's dangerous. I took it to Kia a month ago for the same thing but they said they couldn't find anything, but it has to be something if I'm not the only one saying this is happening to their car. my car doesn't even have 8000 miles on my car.”

NHTSA complaint #11750872, filed 2026-07

Other or unknown: “I had a diagnostic appointment on 9/8/25 for my 2025 Kia K4 due to a popping noise on the windshield that happens when the weather is hot/sun on windshield. Once the diagnostic was complete, the recommendation from the dealer was to replace the windshield since it was not factory. The dealer did hear the noise during the diagnostic. I purchased the vehicle Jan 2025 and I start hearing the popping noise in June 2025 (factory windshield #1). …”

NHTSA complaint #11689694, filed 2025-09

Transmission and drivetrain: “As I entered onto i4 reaching the speed of 60 miles an hour my vehicle began to make a high pitched whining noise that got louder as I pressed on the gas pedal, noise dissipated when I let off the gas pedal. Vehicle began to slow down on its own , even when applying pressure to the gas pedal, I had no choice but to pull over on i4, error message displayed “RED CAUTION EMBLEM” error message “Transmission Control Unit” Kia k4 app displayed Diagnostic Alert AT PO72200”

NHTSA complaint #11729395, filed 2026-04

Air bags: “I was hit on the driver side of the car infront of the driver door side of the hood and it took out my wheel and the car is totaled with how hard the hit was made my car bounce but the air bags never deployed and the fireman and the police officer said with as hard as I was hit it should have deployed”

NHTSA complaint #11733814, filed 2026-04

Mileage when problems were reported

60% of the 5 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 800 and 58,000 miles.

60%0–100%10–250%25–5040%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (5 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 1,300 miles.

Complaints by year filed

This model year is less than 4 years old, so a trend is not meaningful yet.

2025202628
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Crash test ratings

NHTSA's 5-Star Safety Ratings for the 2025 Kia K4. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.

VersionOverallFrontalSideSide poleRollover
K4 · sedan FWD★★★★★5 / 4555 · 9.9% risk

Driver aids listed by NHTSA for the 2025 model year: forward collision warning standard on some versions, lane departure warning standard, automatic emergency braking standard on some versions.

Neighbouring years: 2026: same overall rating. A redesign between years can change both the car and the test.

Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.

Fuel economy and running cost

EPA ratings for each 2025 Kia K4 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
K4 FWD1.6L 4-cyl8-speed automatic263629$2,300
K4 FWD2.0L 4-cylCVT304034$1,950
K4 FWD2.0L 4-cylCVT293933$2,050

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2025 Kia K4 → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 19 on record; the latest 10 are shown.

See all 19 bulletins →

Other model years of the Kia K4

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
20261312,9081530—Too new
2025471,3002533Too new to compareToo new

All Kia K4 model years

Frequently asked questions

How many NHTSA complaints does the 2025 Kia K4 have?

NHTSA recorded 47 consumer complaints for the 2025 Kia K4 as of Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2025 Kia K4 is reported most often?

Electrical system is named most often, in 14 complaints (30% of the total), followed by other or unknown with 12.

Has the 2025 Kia K4 been recalled?

NHTSA lists 2 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

How did the 2025 Kia K4 do in NHTSA crash tests?

NHTSA's 5-Star Safety Ratings give the 2025 Kia K4 5 out of 5 stars overall. Ratings from different model years are only comparable when the vehicle was not redesigned in between.

What gas mileage does the 2025 Kia K4 get?

The EPA rates the 2025 Kia K4 (K4, 2.0L 4-cyl) at 33 mpg combined, 29 city and 39 highway, with an estimated annual fuel cost of $2,050 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2025 Kia K4 reported?

Among the 5 complaints that include a mileage, the median is 1,300 miles and the middle half falls between 800 and 58,000 miles; 60% were filed for vehicles with under 50,000 miles.

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. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.