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Kia · Cars · 2026
Kia K4
92
6 complaints
status.verdict
status.certified
status.certified_sub
product.specifications
specs.g_fuel_economy
specs.city_mpg26
specs.highway_mpg33
specs.combined_mpg28
specs.annual_fuel_cost$2150
specs.ghg_score5 / 10
specs.g_engine_drivetrain
specs.engine_size1.6 L
specs.cylinders4
specs.fuel_typeRegular Gasoline
specs.transmissionAutomatic (S8)
specs.drivetrainFront-Wheel Drive
CO₂314 g/mi
specs.g_classification
specs.vehicle_classMidsize Cars

specs.data_sourced_from FuelEconomy.gov (specs.energy_dept)

product.complaints_section6 total
KIA K4 2026 TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
high
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.
NHTSAUSMay 2026Source →
KIA K4 2026 FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
high
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.
NHTSAUSMay 2026Source →
KIA K4 2026 UNKNOWN OR OTHER
high
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.
NHTSAUSMay 2026Source →
KIA K4 2026 LANE DEPARTURE: WARNING
low
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.
NHTSAUSApr 2026Source →
KIA K4 2026 FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
medium
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.
NHTSAUSFeb 2026Source →
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product.status_history
status.uncertainstatus.certified31 May 2026
Lemon Score: 93. 5 data points. v3 scoring.
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