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EnglishSafety -> Lane Departure Warning for your BMW i4 2021-2025
Safety
CONTROLS
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Vehicle driving slowly in front and being ap-
proached at high speed.
Safety information
Vehicles that suddenly swerve in front of
you, or strongly decelerating vehicles.
Warning
The system cannot serve as a substitute for
the driver’s personal judgment in assessing
road and traffic situations. There is a risk of
accident, injury, and property damage. Adjust
driving style to traffic conditions. Watch sur-
rounding traffic closely and actively intervene
where appropriate Do not jerk the steering
wheel in response to a warning.
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Vehicles with unusual rear designs.
Two-wheeled vehicles ahead of you.
Partially covered pedestrians or bikes.
Pedestrians that are not detected as such
because of their contour or posture.
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Pedestrians who are too small for the sen-
sors to detect.
Warning
Lane Departure Warning
Indicators and warnings cannot serve as a
substitute for the driver’s personal judgment.
Due to its limits, the system may not issue
warnings or responses, or these may be is-
sued late or in a manner that is not consis-
tent with their normal use. There is a risk of
accident, injury, and property damage. Adjust
driving style to traffic conditions. Watch sur-
rounding traffic closely and actively intervene
where appropriate
Principle
The lane departure warning alerts when the
vehicle is about to run off the road or exit the
lane.
General information
Functional requirement
The camera must detect the lane boundaries
for the lane departure warning to be active.
The areas of the sensors must be clean and
clear.
Sensors detect the traffic situation in their de-
tection range.
Sensors
The system is controlled by a camera behind
the windshield.
The system issues a warning starting at a min-
imum speed. The minimum speed is country-
specific and displayed on the control display.
Turning the Lane Departure
Warning on/off
Various warning functions from this system
help the driver keep their vehicle in their lane.
The system does not provide a warning if the
turn signal is set in the respective direction be-
fore exiting the lane.
Turning on the system automatically
Depending on the national-market version, the
system is automatically active after every de-
parture.
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Safety
CONTROLS
Turning on system manually
The system is activated by setting the warning
time.
Setting the intensity of the steering
wheel vibration
1.
Apps menu
Additional information:
2. "Vehicle"
Setting the warning time, refer to page 182.
3. "Driving settings"
4. "Driver Assistance"
5. "Feedback via steering wheel"
6. "Vibration intensity"
7. Select the desired setting.
Turning system off manually
Depending on vehicle equipment and national-
market version, you must successively confirm
the switch-off on the control display.
The setting is applied to all collision warning
systems.
1.
Apps menu
2. "Vehicle"
3. "Driving settings"
4. "Driver Assistance"
5. "Safety and warnings"
6. "Lane Departure Warning"
7. "Off"
Depending on the national-market
version: turning steering intervention
on/off
1.
Apps menu
2. "Vehicle"
3. "Driving settings"
Setting Lane Departure Warning
4. "Driver Assistance"
5. "Safety and warnings"
6. "Lane Departure Warning"
7. "Steering intervention"
Setting the warning time
1.
Apps menu
2. "Vehicle"
Depending on the national-market version, the
steering intervention is automatically active af-
ter every driving off.
3. "Driving settings"
4. "Driver Assistance"
5. "Safety and warnings"
6. "Lane Departure Warning"
7. Select the desired setting.
Display in the instrument cluster
Different system statuses are displayed on
the instrument cluster, depending on vehicle
equipment and national-market version.
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"Early"
"Medium"
"Reduced"
Some warnings are suppressed de-
pending on the situation, for instance
when purposely driving over lane mark-
ings in curves or with dynamic passing
without a turn signal.
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Safety
CONTROLS
Steering intervention
Icon
Meaning
Depending on the equipment and the national-
market version: if a lane marking is crossed in
the speed range up to 130 mph/210 km/h, the
system intervenes with a brief active steering
intervention in addition to vibrating. The sys-
tem supports the driver in keeping the vehicle
within the lane. The steering intervention can
be noticed on the steering wheel and can be
manually overridden at any time.
Indicator light illuminates green: Sys-
tem is switched on. At least one lane
boundary has been detected on one
side of the vehicle. The system is
ready to intervene and issue warn-
ings. The system can perform steer-
ing interventions.
Indicator light flashes green: System
is performing a steering intervention.
During an active steering intervention, a light is
displayed on the instrument cluster.
For instance, the steering intervention will be
suppressed in the following situations:
Depending on vehicle equipment and national-
market version, information for the system is
displayed in the Assisted View of the instru-
ment cluster.
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With hard accelerating or braking.
When flashing.
Additional information:
With hazard warning system switched on.
Assisted View, refer to page 153.
In driving situation with high driving dynam-
ics.
Warning function
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While Dynamic Stability Control regulates
driving stability.
General information
Different warnings are issued by the Lane De-
parture Warning system, depending on situa-
tion and speed:
Immediately following a steering interven-
tion by the vehicle systems.
When actively merging back to your own
lane after passing.
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Indicator lights and warning lights on the
instrument cluster.
End of warning
For instance, the warning or an active steering
intervention will be canceled in the following
situations:
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Vibration of steering wheel.
Steering intervention.
Warning tone.
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Automatically after a few seconds.
When returning to your own lane.
With hard accelerating or braking.
With hazard warning system switched on.
When flashing.
Steering wheel vibration
If you leave the lane and if a lane boundary
has been detected, the steering wheel vibrates
in accordance with the steering wheel vibration
setting.
While Dynamic Stability Control regulates
driving stability.
When the turn signal is switched on in the cor-
responding direction before changing the lane,
a warning is not issued.
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While Dynamic Stability Control is disabled.
Immediately following a steering interven-
tion by the vehicle systems.
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With manual steering intervention.
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When driving very close to the vehicle in
front of you.
When another driver assistance system is
activated, if applicable.
Up to 10 seconds after turning on drive-
ready state using the Start/Stop button.
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No lane boundaries detected.
While Dynamic Stability Control is disabled.
When the system limits are reached.
A Check Control message may be displayed
when the system is limited. A yellow warning
light also illuminates, depending on national-
market version.
Warning signal
A warning tone sounds if the driver does
not actively steer after the Lane Departure
Warning system has performed multiple active
steering interventions within three minutes.
Active Blind Spot Detection
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A short warning tone will sound after the
second steering intervention.
Principle
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A longer warning tone will sound following
the third steering intervention.
Active Blind Spot Detection detects vehicles
in the blind spot or vehicles approaching from
behind in the adjacent lane.
In addition, a Check Control message is dis-
played.
The warning light in the exterior mirror gives
warnings at different levels.
The warning tone and Check Control message
advise the driver to pay closer attention to their
lane.
General information
The longer warning tone is stopped if the
driver takes control of the steering.
System limits
General information
Follow the system limits in the "Collision warn-
ing systems" chapter.
Functional limitations
The system may be limited in the following
situations:
Radar sensors monitor the area behind and
next to the vehicle when traveling faster than a
minimum speed.
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In the event of missing, worn, poorly visible,
merging, diverging, or multiple lane boun-
daries such as in construction areas.
The minimum speed is country-specific and
displayed in the Active Blind Spot Detection
menu.
With lane boundaries that are covered in
snow, ice, dirt or water.
The system indicates whether there are vehi-
cles in your blind spot, arrow 1, or approaching
from behind in an adjacent lane, arrow 2. The
warning light in the exterior mirror illuminates
dimly.
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In tight corners or on narrow roads.
With lane boundaries that are covered by
objects.
Before you change lanes after setting the turn
signal, the system issues a warning in the
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