Kia K4: Forward Collision-Avoidance Assist (FCA) (Sensor Fusion) / Forward Collision-Avoidance Assist malfunction and limitations

Kia K4 (CL4) 2025-2026 Owner's Manual / Driver assistance guide / Forward Collision-Avoidance Assist (FCA) (Sensor Fusion) / Forward Collision-Avoidance Assist malfunction and limitations

Contents:

Forward Collision-Avoidance Assist malfunction

Kia K4 instrument cluster displaying a system check notification for the driver assistance system

Check Driver Assistance system

If the Forward Collision-Avoidance Assist (FCA) system in your Kia K4 encounters a fault and is not functioning correctly, the instrument cluster will provide visual alerts to notify the driver. These include the Master warning light (), the Forward Safety warning light (), and the Emergency Steering warning light (). A descriptive warning message will also persist for several seconds. If you see these alerts, please have your Kia K4 inspected by an authorized Kia dealer as soon as possible.

Forward Collision-Avoidance Assist disabled

	Driver Assistance system limited. Camera obscured.
	Driver Assistance system limited. Radar blocked.

The Forward Collision-Avoidance Assist system relies on clear sensor visibility to operate effectively. Environmental factors such as heavy snow, mud, or rain accumulating on the windshield (where the front camera is positioned), the front radar cover, or the bumper can significantly reduce detection performance, leading to a temporary limitation or full deactivation of the system in your Kia K4.

Should the system be affected, the instrument cluster will display a warning message accompanied by the Forward Safety warning light (), the Emergency Steering warning light (), and the Master warning light ().

In most cases, the Forward Collision-Avoidance Assist system will resume normal operation automatically once you have cleared the foreign material (such as snow or debris) from the sensors. However, if the system fails to operate correctly after the sensors are clean, or if you suspect obstructions from external accessories (such as a trailer or rear-mounted carrier), please contact an authorized Kia dealer to have your Kia K4 thoroughly inspected.

WARNING

Always be aware that the Forward Collision-Avoidance Assist system may not function as expected even if no explicit warning messages or indicator lights appear on your Kia K4 instrument cluster.

TIP

To verify the current operational status of the Forward Collision-Avoidance Assist system, you can navigate to the "Service" section within the utility information view on the Kia K4 instrument cluster display window.

Limitations of Forward Collision-Avoidance Assist ➤

Junction Crossing, Lane-Change Oncoming, Lane-Change Side, Evasive Steering Assist function: ➤

Evasive Steering Assist function:

Limitations of Forward Collision-Avoidance Assist

Other information:

Kia K4 (CL4) 2025-2026 Owner's Manual: How to use the Digital Key 2 (Smartphone)

Proximity and Smartphone Touch Control Operating your vehicle with the cutting-edge Kia Digital Key 2 framework brings maximum flexibility to your daily routine. You can lock and unlock the entry doors seamlessly without even needing to manually launch or activate the Kia Access App on your mobile device. By simply bringing your compatible smartphone into close proximity or tapping it against the integrated sensor plate on the exterior handle, the vehicle executes your command instantly.

Kia K4 (CL4) 2025-2026 Owner's Manual: If you have a flat tire (with spare tire)

If you encounter a flat tire while driving your Kia K4, you can utilize the onboard emergency tools to replace the damaged tire with the spare tire stored in your vehicle. WARNING Driving on a flat tire causes permanent structural damage to the tire carcass. Never attempt to reinflate a tire that has been driven on while severely underinflated or flat, as this significantly increases the risk of a blowout and a serious crash.