Kia K4: Occupant Detection System (ODS) / Conditions and operation of the front passenger Occupant Detection System (ODS)

The Occupant Detection System (ODS) in your Kia K4 utilizes advanced sensors to classify occupants. While the system is programmed to recognize an adult-sized passenger, variations in physique, posture, or weight distribution can sometimes lead the Kia K4 to classify a smaller adult as a child. Conversely, a larger child who has transitioned out of a Child Restraint System (CRS) might occasionally be identified as an adult depending on how they are positioned on the seat cushion.

To maximize safety, we strongly recommend that children do not ride in the front passenger seat. For your protection, never attempt to install a CRS in the front passenger position of your Kia K4. If a child between the ages of 12 months and 12 years (with or without a CRS) occupies the front seat, you may observe the PASSENGER AIR BAG OFF ( ) indicator toggling on and off; this is a normal operational behavior of the system's detection logic.

WARNING

WARNING

To ensure the safety of all occupants, never attempt to modify, remove, or replace the front passenger seat of your Kia K4. Additionally, do not place or attach any unauthorized items—such as blankets, aftermarket seat covers, or non-factory seat heaters—to the front passenger seat. These accessories can interfere with the sensitivity of the seat-based sensors, which may adversely affect the performance of the Occupant Detection System (ODS).

WARNING

	Do not place heavy loads, bags, or items in the front passenger seatback pocket or directly on the cushion of the Kia K4 passenger seat.
	Do not place your feet on the front passenger seatback, as this puts undue pressure on the internal sensors.
	Never sit with your hips shifted toward the front edge of the seat; always sit fully back in the seat cushion.
	Never excessively recline the Kia K4 front passenger seatback, as this disrupts occupant positioning and system accuracy.
	Never place your feet on the instrument panel, as this removes your weight from the seat sensors and poses extreme danger during airbag deployment.
	Never lean against the door panel or center console. Never sit on one side of the Kia K4 passenger seat; always remain centered.
	Do not use car seat accessories, such as thick blankets or heavy aftermarket cushions, that obscure the surface of the Kia K4 seat. Do not place electronic devices (e.g., laptops, tablets) or heavy items (e.g., large quantities of water bottles) on the passenger seat, as they may be misinterpreted as human weight. Wet passenger seat: Do not spill liquids on the seat. Spilled liquid can penetrate the internal sensors and trigger an airbag warning light or system malfunction. If a spill occurs, ensure the seat is completely dried before operating your Kia K4.

If an adult passenger is seated in the front passenger seat of your Kia K4 and the PASSENGER AIR BAG OFF ( ) indicator remains illuminated, please switch the ENGINE START/STOP button to the OFF position. Ask the passenger to assume a correct, upright posture—sitting squarely on the seat cushion with their back against the seatback, seat belt fastened, legs extended comfortably, and feet resting firmly on the floor. After the passenger has properly repositioned, restart the Kia K4. This sequence allows the ODS to recalibrate and detect the occupant, enabling the front passenger airbag for optimal protection.

Should the PASSENGER AIR BAG OFF ( ) indicator persist after these efforts, we strongly advise the passenger to relocate to the rear seat for their safety.

WARNING

NOTE

• Although your Kia K4 is equipped with a sophisticated Occupant Detection System, you should never attempt to install a Child Restraint System (CRS) in the front passenger seat. An inflating airbag can strike a child restraint with immense force, resulting in catastrophic injury or death.

For maximum safety, all children under the age of 13 should be seated in the rear of the Kia K4. Children who have outgrown specialized child restraints should utilize the vehicle's standard lap/shoulder belts. Regardless of the collision type, statistics consistently show that children are safest when properly secured in the rear seating positions of your vehicle.

In the unlikely event that the ODS malfunctions, the Supplemental Restraint System (SRS) airbag warning light will illuminate on the Kia K4 instrument panel, as the passenger's front airbag is tethered to the ODS status. If the ODS suffers a failure, the PASSENGER AIR BAG OFF ( ) indicator will not appear. In this specific scenario, the passenger's front airbag will deploy during a frontal impact, even if the front seat is completely unoccupied. If you notice any inconsistencies with these warning lights, please visit an authorized Kia service center immediately to have the system inspected.