Kia K4 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
53 owner complaints analyzed
3 distinct recall campaigns
1,050 mi median reported failure mileage
Scope: 2025 to 2026 model years. Data snapshot: . 6 complaints include usable failure mileage.
Most common problems
Unknown Or Other is the most frequently named component, appearing in 15 of 53 complaints (28.3%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Steering behavior | 13 | 24.5% |
| Transmission and shifting | 9 | 17.0% |
| Braking behavior | 8 | 15.1% |
| Electrical and battery issues | 2 | 3.8% |
| Engine operation | 1 | 1.9% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Unknown Or Other | 15 |
| Electrical System | 12 |
| Steering | 8 |
| Air Bags | 7 |
| Engine | 7 |
| Lane Departure: Assist | 7 |
| Power Train | 7 |
| Lane Departure: Warning | 5 |
Unknown Or Other: 15; Electrical System: 12; Steering: 8; Air Bags: 7; Engine: 7; Lane Departure: Assist: 7; Power Train: 7; Lane Departure: Warning: 5
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 4 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 2 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 4; 25,000 to 49,999: 0; 50,000 to 74,999: 2; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (4). 47 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2025 | 19 |
| 2026 | 34 |
2025: 19; 2026: 34
Pattern summary
Unknown Or Other leads the component reports. Steering behavior appears in 13 complaint narratives. Transmission and shifting appears in 9 complaint narratives. Braking behavior appears in 8 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11645914 · 2025-03-03 (March 3, 2025)
The contact owned a 2025 Kia K4. The contact stated while driving at various speeds, the vehicle was pulling to the left unintendedly. The contact stated that upon disengaging the Lane Keep Assist, the failure recurred while driving. The vehicle was taken to Discount Tire, where the tire pressure was adjusted. The vehicle was taken to the dealer, where an alignment was performed; however, the failure persisted. The contact stated while exiting the expressway and driving approximately 30 MPH, the vehicle veered to the left unintendedly, causing …
Owner-reported narrative. 1,300 miles reported. Look up ODI 11645914 at NHTSA ↗
Owner report 11684275 · 2025-09-01 (September 1, 2025)
The airbags failed to go off. I think the vehicle is still available it was towed to Carroll's in Winslow Maine. By the airbags not going off it made the risk of injury much greater. Also lost control of the steering all together. Tried to swerve to miss an animal and the steering assist took over. Yes we have a police report stating that the airbags didn't go off. I am sure budget had their people go look at the car. No warning lights present.
Owner-reported narrative. Look up ODI 11684275 at NHTSA ↗
Owner report 11667842 · 2025-06-18 (June 18, 2025)
Bought my Kia k4 2025 in February at DTLA Kia and the experience has been [XXX]. The first day driving I went up near dodgers stadium , immediately had a burnt smell. I disregarded it thinking maybe its fresh paint burning , WRONG. Till this day 4 months later my tail pipe throws a musty smell. Issue number 2 , the hesitant gas pedal. Who knows what it is maybe fuel system , transmission but daily and I mean DAILY my accelaration is poor,jerky, struggling and overall doesn't work. It has its good mornings but once I'm on the road for more than …
Owner-reported narrative. Look up ODI 11667842 at NHTSA ↗
Owner report 11688136 · 2025-09-18 (September 18, 2025)
THIS SAME INCIDENT HAD HAPPENED 6 TIMES PRIOR TO MY BEING ABLE TO TAKE A PICTURE OF MY DASHBOARD. THE CRUISE CONTROL CHANGES ON ITS OWN TO 90 OR 110 MPH AND THE ACCELERATION BEGINS ON ITS OWN VERY AGGRESIVELY. IT HAS NOTHING TO DO WITH THE SPEED LIMIT AS YOU WILL SEE ON THE PICTURE, THE SPEED LIMIT IS 65 AND I HAD ALREADY STEPPED ON MY BRAKE TO WHERE MY SPEED WAS THEN 59. I HAVE TAKEN IT FOR SERVICE AT ED MORSE KIA IN SIERRA VISTA, AZ AND THE PROBLEM COULDN'T BE DUPLICATED OR FIXED. I HAVE TOLD THE SALES MGR. AND SERVICE MGR. ABOUT THIS AN…
Owner-reported narrative. Look up ODI 11688136 at NHTSA ↗
Owner report 11706751 · 2025-12-23 (December 23, 2025)
High mounted rare brake (pulse)
Owner-reported narrative. Look up ODI 11706751 at NHTSA ↗
Owner report 11683077 · 2025-08-26 (August 26, 2025)
The contact owns a 2025 Kia K4. The contact stated that after driving for approximately 40 minutes at speeds between 55-75 MPH, the TPMS warning light started flashing, with the message "Check Tire Pressure" displayed. The vehicle was taken to the dealer three times. On the first visit, the dealer was unable to duplicate the issue. On the second visit, the dealer diagnosed the vehicle with an electrical system failure and reprogrammed the TPMS; however, the failure persisted. On the third visit, the dealer was unable to determine the cause of t…
Owner-reported narrative. 800 miles reported. Look up ODI 11683077 at NHTSA ↗
Owner report 11743732 · 2026-06-12 (June 12, 2026)
The contact owns a 2025 Kia K4. The contact stated that while driving at 75 MPH, the vehicle downshifted upon depression of the accelerator pedal, with heavy white smoke coming out of the exhaust pipe. The contact stated that the low oil pressure warning light was illuminated prior to the failure. The contact pulled off the highway and drove into a store parking lot as the engine made an abnormal knocking sound. The contact requested assistance from a bystander, who advised the contact that the head gasket appeared to have blown. The contact c…
Owner-reported narrative. 58,000 miles reported. Look up ODI 11743732 at NHTSA ↗
Owner report 11748745 · 2026-07-07 (July 7, 2026)
The contact owns a 2025 Kia K4. The contact stated while driving at 40 MPH on several occasions, the vehicle stalled. The vehicle was able to restart but would immediately stall again, requiring the driver to wait approximately 10 minutes before the vehicle could be successfully restarted and driven. The vehicle was towed on one occasion and taken to the same dealer twice, but the dealer was unable to replicate the failure. The manufacturer was notified of the failure. The failure mileage was approximately 69,085.
Owner-reported narrative. 69,085 miles reported. Look up ODI 11748745 at NHTSA ↗
Recalls by model year
All campaigns in the snapshot affecting each model year, including recalls announced years later.
Recall campaigns
Shared campaigns appear once in each affected model year.
| Category | Count |
|---|---|
| 2025 | 2 |
| 2026 | 1 |
2025: 2; 2026: 1