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Everything about the Kia K4, all generations together: defects, recalls, service bulletins and discussions. Pick a generation to narrow it down.
18 owners in the United States reported problems with the electrical system of this car to NHTSA (model years 2025–2026), typically at around 25,000 miles. Reported consequences: 2 crashes, 1 fire, 1 injury.
10 owners in the United States reported problems with the steering of this car to NHTSA (model years 2025–2026). Reported consequences: 4 crashes, 2 injuries.
12 owners in the United States reported problems with the lane assist of this car to NHTSA (model years 2025–2026), typically at around 1,000 miles. Most often named: assist (58%), warning (42%). Reported consequences: 5 crashes, 4 injuries.
The rear centre seatbelt anchor buckle may not latch properly. This is due to a manufacturing error by the supplier the buckle may fail to fully engage when the tongue is inserted. A seatbelt anchor buckle that does not latch correctly may not provide adequate occupant restraint during certain collision events increasing the risk of injury.
The instrument cluster screen may respond slowly immediately after starting the vehicle. During this condition activating the turn signal can cause the cluster to reset or the Blind View Monitor (BVM) within the cluster to turn green. The malfunction is caused by PMIC noise induced falsely high temperature sensor readings which trigger the chip protection logic above a certain threshold and lead to performance limitation up to reboot or black screen.
Issue: On certain vehicles, the rear center seat belt buckle may not have been manufactured properly. As a result, the seat belt may not latch securely. Note: This recall only affects certain K4 hatchback models. Safety Risk: A seat belt that doesn't latch properly could increase the risk of injury in a crash. Corrective Actions: To reduce the safety risk, Kia advises that you shouldn't transport a passenger in the rear center seat until the recall repairs are completed. Kia will notify owners by mail and advise you to take your vehicle to a dealership to inspect and, if necessary, replace the rear center seat belt buckle.
TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC26) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information related to extracting in use monitoring performance tracking emissions data from the Engine Control Unit (ECU) of certain vehicles sold in California. The California Air Resources Board (CARB) requires the emissions data from vehicles with a minimum of 3,000 accumulated miles without reprogramming or resetting.
TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC26) - This bulletin provides information related to extracting in use monitoring performance tracking emissions data from the Engine Control Unit (ECU) of certain vehicles sold in California. The California Air Resources Board (CARB) requires the emissions data from vehicles with a minimum of 3,000 accumulated miles without reprogramming or resetting.
PITSTOP: TECHNICAL OPERATIONS: EXTERNAL DAMAGE TO ULTRASONIC SENSOR: This Pitstop provides information related to Parking Distance Warning (PDW) alerts and repairs involving ultrasonic sensors. The PDW system alerts the driver while parking, by calculating distance based on the difference in signal transmission and reception times between the vehicle (ultrasonic sensor) and an object. The membrane film of the ultrasonic sensor is used for object detention and can be damaged by stone chips or foreign substances while driving. Damage to the cover of the ultrasonic sensor can also lead to damage to the internal circuit. As a result of this external damage, the PDW system may not receive the proper signal from the ultrasonic sensor. In some cases, the system may cause a false alarm, no alert, or phantom warnings by a Warning Lamp to be displayed on the cluster. The ultrasonic sensor membrane film should be always inspected for external damage and if any part replacement should be treated as a general repair, not as a warranty claim repair for this concern. (Please note that this Pitstop only applies to models/trims that are equipped with the ultrasonic sensors.)
Defects and discussions are filed under a generation: pick one above to add yours.
Sources: NHTSA (United States, public domain), Transport Canada (Open Government Licence – Canada), DVSA (United Kingdom, Open Government Licence v3.0), RappelConso and EU Safety Gate (France, Licence Ouverte 2.0).