Kia K4 Complaints (2026)

7 consumer complaints on file.

#11755719August 9, 2026
STEERING, UNKNOWN OR OTHER, LANE DEPARTURE: ASSIST
The vehicle issues began 3 weeks after purchasing a 2026 Kia K4 with 89 miles on it. *"Key fob not recognized", black screen, car not starting and cascading into many other infotainment problems. ** Revving far higher (1.4 - 4.4) with the slightest acceleration ***Hesitating, them engaging so suddenly that steering is incredibly difficult. On more than one occasion, of someone had been in front of me, I would have hit them. ****All steering assist options OFF yet the car will take control and turn me towards oncoming traffic. I absolutely could have been in/caused a serious accident. •We have had it into the service department 3 times and they were "unable to replicate" in spite of the fact that the second technician was unable to lock/unlock the door while my husband was standing with him. They refused to see the videos that we had of some of the problems.They lied about how far it was driven. 2 of the visits the average speed limit was 23 and 25 mph. Total miles driven: 11 v/s the 39 reported. One visit claims 4 miles but our app shows nothing for the time it was being looked at. •I have asked many times if the computer system had been checked for error codes or glitches and no one will answer the question. •No warning lights, just MANY obvious computer system problems
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741355June 1, 2026
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
The contact owns a 2026 Kia K4. The contact stated that on several occasions while driving at various speeds with the smart cruise control activated, the brake was applied inadvertently and the steering wheel steered to the right, overcorrecting his steering efforts. The contact state that the inadvertent braking and steering nearly caused the vehicle to crash and almost resulted in the vehicle being rear-ended by another vehicle. The vehicle was taken to a dealer where it was diagnosed that the vehicle operating normally and there was no failure replicated. The manufacturer was notified of the failure and multiple complaints were filed. The failure mileage was unknown.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11739871May 25, 2026
UNKNOWN OR OTHER
My car was brand new with only 1442 miles. I was hit in the rear passenger side at a four way stop, this was not much force, however I was injured and my car was deemed a total loss. I fear this car ranks low in safety. Thankfully my daughter was not with me at the time.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11738505May 18, 2026
LANE DEPARTURE: LANE KEEP: AUTOMATIC STEERING, TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
The contact owns a 2026 Kia K4. The contact stated while her daughter was driving at approximately 25 MPH, the lane assist feature was diabled however, the contact attempted to avoid a dog and the vehicle independently jerked the vehicle and caused the front driver side of the vehicle to crash into a fence. No warning lights were illuminated. The air bags were not deployed. The vehicle was taken back to the residence. A police report was filed. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 465.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11733624April 24, 2026
STEERING, LANE DEPARTURE: ASSIST, LANE DEPARTURE: WARNING
Sometimes when I’m driving the steering wheel just jerks to the left sometimes causing me to swerve into incoming traffic. It’s very scary. Luckily I’m holding tight to the steering wheel to keep myself from hitting someone.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720323February 25, 2026
STEERING, LANE DEPARTURE: BLIND SPOT DETECTION, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Steering Instability: The steering wheel would periodically veer to the right and left on its own without my input. This created an unsafe driving condition and required constant correction to maintain control of the vehicle. Blind Spot / Reverse Detection Malfunction: When shifting the vehicle into reverse, the dashboard display indicated that no vehicle was present. However, when visually checking my driver-side mirror, there was clearly a vehicle immediately adjacent to my car. The system failed to detect or warn of the nearby vehicle, creating a significant near missed accident and safety risk.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718955February 18, 2026
VEHICLE SPEED CONTROL
transmission stopped working when the vehicle was used under 200 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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