Blind-Spot Collision-Avoidance Assist malfunction and limitations

Blind-Spot Collision-Avoidance Assist malfunction
2025 Hyundai Tucson Driver Assistance system warning message image. The instrument cluster screen displays the text 'Check driver assistance system.' and a triangle icon with an exclamation mark. This explains the alert shown when the Blind-Spot Collision-Avoidance Assist is not working properly.

2C_DriverAssistanceMalfunction

When Blind-Spot Collision-Avoidance Assist is not working properly, the Check Driver Assistance system warning message will appear on the instrument cluster for several seconds, and the master (X) warning light will appear on the instrument cluster. If this occurs, we recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

2025 Hyundai Tucson Check outside mirror warning icon message image. The instrument cluster screen displays the text \'Check outside mirror warning icon\' above a triangle symbol containing an exclamation mark. This explains the warning message displayed when the outside rearview mirror warning light malfunctions.

2C_CheckSideViewMirrorWarningLightInfo

When the outside rearview mirror warning light is not working properly, the Check outside rearview mirror warning light warning message will appear on the instrument cluster for several seconds, and the master (X) warning light will appear on the instrument cluster. If this occurs, we recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

Blind-Spot Collision-Avoidance Assist disabled
2025 Hyundai Tucson instrument cluster warning image. It displays 'Driver Assistance system limited. Radar blocked.' in white text. This explains the alert shown when the radar is blocked, limiting the Blind-Spot Collision-Avoidance Assist function.

2C_DriverAssistanceDisabledRadar

When the rear bumper around the rear corner radar or sensor is covered with foreign material, such as snow or rain, or installing a trailer or carrier, it can reduce the detecting performance and temporarily limit or disable Blind-Spot Collision-Avoidance Assist.

If this occurs, the Driver Assistance system limited. Radar blocked warning message will appear on the cluster.

Blind-Spot Collision-Avoidance Assist will operate properly when such foreign material or trailer, etc., is removed, and then the vehicle is restarted.

If Blind-Spot Collision-Avoidance Assist does not operate properly after it is removed, we recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

  • Even though the warning message does not appear on the instrument cluster, Blind-Spot Collision-Avoidance Assist may not properly operate.

  • Blind-Spot Collision-Avoidance Assist may not properly operate in an area (for example, open terrain) where any objects are not detected right after the vehicle is turned on, or when the detecting sensor is blocked with foreign material right after the vehicle is turned on.

Turn off Blind-Spot Collision-Avoidance Assist to install or remove a trailer, carrier, or another attachment. Turn on Blind-Spot Collision-Avoidance Assist when finished.

Limitations of Blind-Spot Collision-Avoidance Assist

Blind-Spot Collision-Avoidance Assist may not operate properly, or it may operate unexpectedly under the following circumstances:

  • There is inclement weather, such as heavy snow, heavy rain, etc.

  • The rear corner radar is covered with snow, rain, dirt, etc.

  • The temperature around the rear corner radar is high or low

  • Driving on a highway ramp

  • The road pavement (or the peripheral ground) abnormally contains metallic components (for example, possibly due to subway construction)

  • There is a fixed object near the vehicle, such as sound barriers, guardrails, central dividers, entry barriers, street lamps, signs, tunnels, walls, etc. (including double structures)

  • Driving in vast areas where there are few vehicles or structures (for example, desert, meadow, suburb, etc.)

  • Driving through a narrow road where trees or grass are overgrown

  • Driving on a wet road surface, such as a puddle on the road

  • The other vehicle drives very close behind your vehicle, or the other vehicle passes by your vehicle in close proximity

  • The speed of the other vehicle is very fast that it passes by your vehicle in a short time

  • Your vehicle passes by the other vehicle

  • Your vehicle changes lane

  • Your vehicle has started at the same time as the vehicle next to you and has accelerated

  • The vehicle in the next lane moves two lanes away from you, or when the vehicle two lanes away moves to the next lane from you

  • A trailer, carrier or other attachment is installed around the rear corner radar

  • The bumper around the rear corner radar is covered with objects, such as a bumper sticker, bumper guard, bike rack, etc.

  • The bumper around the rear corner radar is impacted, damaged or the radar is out of position

  • Your vehicle height is low or high due to heavy loads, abnormal tire pressure, etc.

Blind-Spot Collision-Avoidance Assist may not operate properly, or it may operate unexpectedly when the following objects are detected:

  • A motorcycle or bicycle is detected

  • A vehicle such as a flat trailer is detected

  • A big vehicle such as a bus or truck is detected

  • A moving obstacle such as a pedestrian, animal, shopping cart or a baby stroller is detected

  • A vehicle with low height such as a sports car is detected

Braking control may not work, driver's attention is required in the following circumstances:

  • The vehicle severely vibrates while driving over a bumpy road, uneven road or concrete patch

  • Driving on a slippery surface due to snow, water puddle, ice, etc.

  • The tire pressure is low or a tire is damaged

  • The braking system has been modified

  • The vehicle makes abrupt lane changes

  • Driving on a curved road

    2025 Hyundai Tucson Blind-Spot Collision-Avoidance Assist limitation image. A white vehicle is on a curved road with a grey vehicle in the next lane. A dark grey shaded area shows the radar range extending straight back, illustrating how the curve affects detection. This explains the limitation where the system may not detect vehicles in the next lane on curved roads.

    2C_BCADrivingOnCurveLoad

    Blind-Spot Collision-Avoidance Assist may not operate properly when driving on a curved road. The function may not detect the vehicle in the next lane.

    Always pay attention to road and driving conditions while driving.

    2025 Hyundai Tucson Blind-Spot Collision-Avoidance Assist limitation image. It depicts two vehicles on a curved road where the radar detection range, shown as a grey shaded area, misses the vehicle in the adjacent lane. This explains the limitation where the system may not detect vehicles in the next lane on curves.

    2C_BCADrivingOnCurveLoad_2

    Blind-Spot Collision-Avoidance Assist may not operate properly when driving on a curved road. The function may recognize a vehicle in the same lane.

    Always pay attention to road and driving conditions while driving.

  • Driving on an inclined road

    2025 Hyundai Tucson Blind-Spot Collision-Avoidance Assist image. A white vehicle merges into the adjacent lane, indicated by a black curved arrow, with a grey vehicle approaching in the dark grey detection zone. This illustrates the system's detection range during a road merging scenario.

    2C_BCADrivingRoadMerging

    Blind-Spot Collision-Avoidance Assist may not operate properly when driving on a slope. The function may not detect the vehicle in the next lane or may incorrectly detect the ground or structure. Always pay attention to road and driving conditions while driving.

  • Driving where the road is merging/dividing

    2025 Hyundai Tucson Blind-Spot Collision-Avoidance Assist limitation on an inclined road image. Shows the vehicle on a slope where the rear radar beam projects too high or into the ground, missing the vehicle in the adjacent lane. Explains that the system may not detect vehicles properly on steep slopes.

    2C_BCADrivingOnInclinedLoad

    Blind-Spot Collision-Avoidance Assist may not operate properly when driving where the road merges or divides. The function may not detect the vehicle in the next lane.

    Always pay attention to road and driving conditions while driving.

  • Driving where the heights of the lanes are different

    2025 Hyundai Tucson Blind-Spot Collision-Avoidance Assist limitation image. A vehicle on a higher elevation emits a radar beam that passes over a vehicle in the adjacent lower lane. This illustrates the limitation where the system may fail to detect vehicles due to height differences caused by road levels or heavy loads.

    2C_BCADrivingLoadHeightDifferent

    Blind-Spot Collision-Avoidance Assist may not operate properly when driving where the heights of the lanes are different. The function may not detect the vehicle on a road with different lane heights (underpass joining section, grade separated intersections, etc.).

    Always pay attention to road and driving conditions while driving.

  • When you are towing a trailer or another vehicle, make sure that you turn off Blind-Spot Collision-Avoidance Assist.

  • Blind-Spot Collision-Avoidance Assist may not operate properly if interfered by strong electromagnetic waves.

  • Blind-Spot Collision-Avoidance Assist may not operate for about 3 seconds after the vehicle is started, or the front view camera or rear corner radars are initialized.