BMW 3 Owners & Service Manuals

BMW 3: Warning with braking function


If a collision with a pedestrian or a cyclist is imminent, a warning symbol appears on the instrument cluster and in the Head-up Display.

The red symbol is displayed and a signal sounds.

Alternatively, depending on the vehicle equipment, a red warning triangle lights up in the instrument cluster.

Intervene immediately by braking or make an evasive maneuver.

Braking intervention

The warning prompts the driver to intervene. If a warning is active, the maximum braking force is used when the brake is applied. This requires the brake pedal to be depressed sufficiently quickly and forcefully.

If there is a risk of collision, the system may also assist with braking.

When the vehicle is traveling at a low speed, the vehicle may come to a complete stop.

The braking intervention occurs only if vehicle stability has not been restricted, for instance by deactivating the DSC Dynamic Stability Control.

The driver may interrupt the braking intervention function by stepping on the accelerator pedal or by actively moving the steering wheel.

The system's ability to detect objects may be limited in some circumstances. Refer to the information in this Owner's Manual regarding the limitations of the system and actively intervene as warranted.

System limits

Safety information

Warning The system is designed to operate in certain conditions and circumstances. Due to conditions or other factors, the system may not respond.

There may be a risk of accident or risk of damage to property. Actively intervene as warranted. Refer to the information in this Owner's Manual regarding the scope of the system's operation and limitations.

Upper speed limit

The system responds to pedestrians and cyclists when the speed of the vehicle is below approx.50 mph/80 km/h.

Detection range

The system's detection potential is limited.

Thus, a warning might not be issued or be issued late.

The following situations may not be detected, for instance:

  • Partially covered pedestrians.
  • Pedestrians that are not detected as such because of the viewing angle or contour.
  • Pedestrians outside of the detection range.
  • Pedestrians having a body size less than 32 in/80 cm.

Functional limitations

The system may not be fully functional or may not be available in the following situations:

  • In heavy fog, wet conditions, or snowfall.
  • In tight curves.
  • If the driving stability control systems are deactivated, for instance DSC OFF.
  • If the field of view of the camera or the windshield is dirty or covered in the area of the interior mirror.
  • If the camera has overheated and been temporarily switched off due to excessively high temperatures.
  • Depending on the equipment: if the radar sensors are dirty or covered.
  • After improperly performed work on the vehicle paint.
  • Up to 10 seconds after the start of the engine via the Start/Stop button.
  • During calibration of the camera immediately after vehicle delivery.
  • If there are constant blinding effects because of oncoming light, for instance from the sun low in the sky.
  • When it is dark outside.

Attaching any objects such as stickers or film in the beam area of the radar sensors will also impact the function of the radar sensors and may even cause them to fail.


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