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EnglishWheels and tires -> Tire pressure monitor for your BMW i4 2021-2025
Wheels and tires
MOBILITY
Functional requirements
The following prerequisites must be met for
the system; otherwise, reliable notification of a
tire pressure loss is not assured:
Tire pressure monitor
Principle
The Tire Pressure Monitor monitors the tire
pressure and issues a warning if the tire pres-
sure has dropped.
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After each tire or wheel change, the system
detects and updates the mounted tires on
the control display and displays them after
a short trip.
General information
Sensors in the tire valves measure the tire in-
flation pressure and tire temperature.
Enter the information about the mounted
tires in the tire settings when the system
does not automatically detect the tires.
Depending on the tires detected or registered,
the system displays the specified nominal
pressures on the control display and compares
them with the current tire pressures.
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The Tire Pressure Monitor does not acti-
vate until after driving for a few minutes:
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After a tire or wheel change.
After a reset, when using tires with spe-
cial approval.
If tires are being used that are not specified
in the tire inflation pressure details on the ve-
hicle such as tires with special approval, the
system needs to be actively reset. The system
will then take over the actual tire inflation pres-
sures as the target pressures.
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After changing the tire setting.
For tires with special approval:
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After a tire or wheel change, a reset was
performed with the correct tire inflation
pressure.
When operating the system, also note the in-
formation found in the Tire inflation pressure
chapter.
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After the tire inflation pressure was ad-
justed to a new value, a reset was per-
formed.
Additional information:
Tire inflation pressure, refer to page 301.
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Wheels with air pressure sensor.
Safety information
Tire settings
General information
Warning
The information about the mounted tires can
be entered in the tire settings if the system
does not automatically detect the tires.
The display of the target pressures is not
a substitute for the tire inflation pressure de-
tails on the vehicle. Incorrect entries in the
tire settings can lead to incorrect target tire
inflation pressure values. In this case, it can-
not be guaranteed that the notification of a
tire pressure loss will be reliable. There is a
risk of injury and risk of property damage.
Make sure that the sizes of your mounted
tires are displayed correctly and match the
information on the tires and the tire inflation
pressure specifications on the vehicle.
The tire sizes of the mounted tires can be
gathered from the tire inflation pressure details
on the vehicle or directly on the tires.
The tire details do not need to be re-entered
when the tire pressure is corrected.
For summer and winter tires, the tire details
entered last are stored. After a tire or wheel
change, the settings of the tire sets used last
can be selected.
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Wheels and tires
MOBILITY
Adjusting the tires
Current tire temperature
1.
Apps menu
The current tire temperatures are displayed
depending on the model.
2. "Vehicle"
The current tire temperatures may change
while driving or due to the outside tempera-
ture.
3. "Vehicle status"
4. "Tire Pressure Monitor"
5. "Tire settings"
6. "Tire selection"
7. "Manual"
Nominal pressure
The nominal pressure for the tires on the front
and rear axles is displayed.
8. "Tire type"
The specified nominal pressures take the in-
fluence of driving and outside temperature on
the tire temperature into account. The appro-
priate nominal pressure is always displayed,
independent of the weather situation, tire tem-
peratures and travel times.
9. Select the tire size for the rear axle.
For tires with special approval:
"Other tires"
Observe further proceeding in the perform
a reset section.
The displayed nominal pressure may change
and may differ from the tire inflation pressure
details on the door pillar of the driver's door.
The tire inflation pressure can thus be cor-
rected to the value of the displayed target
pressures.
10. Select the maximum speed to be driven.
11. "Save tire settings"
The measurement of the current tire inflation
pressure is started. The measurement prog-
ress is displayed.
The nominal pressure is immediately adjusted
if the vehicle load state is changed in the tire
settings.
Status display
Current status
The system status can be displayed on the
control display, e.g., whether or not the system
is active.
Tire conditions
General information
1.
Apps menu
Tire and system status are indicated by the
color of the wheels and a text message on the
control display.
2. "Vehicle"
3. "Vehicle status"
Any existing messages may not be deleted if
the nominal pressure is not reached after the
tire inflation pressure is corrected.
4. "Tire Pressure Monitor"
The current status is displayed.
Current tire pressure
The current tire pressure is displayed for each
tire.
All wheels green
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The system is active and bases warnings
on the target pressures.
The current tire inflation pressures may
change while driving or depending on the out-
side temperature.
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For tires with special approval: the system
is active and bases warnings on the tire
inflation pressures stored during the last re-
set.
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Wheels and tires
MOBILITY
One to four yellow wheels
A flat tire or major tire pressure loss has occur-
red in the indicated tires.
Messages: for tires without special
approval
General information
When a flat tire is indicated, the Dynamic Sta-
bility Control may be turned on.
Gray wheels
It may not be possible to identify tire pressure
losses.
Safety information
Possible causes:
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Malfunction.
Warning
During tire inflation pressure measurement,
after confirmation of the tire settings.
A damaged regular tire with low or no tire
inflation pressure impacts handling such as
steering and braking response. Runflat tires
can maintain limited stability. There is a risk
of accident, injury, and property damage. Do
not continue driving if the vehicle is equipped
with normal tires. Follow the information on
runflat tires and continued driving with these
tires.
▷
For tires with special approval: a reset is
performed for the system.
For tires with special approval:
performing a reset
1.
Apps menu
2. "Vehicle"
3. "Vehicle status"
4. "Tire Pressure Monitor"
5. Make sure that the tire settings are correct.
Tire settings, refer to page 316.
If a tire inflation pressure check is
required
Message
6. Turn on drive-ready state and do not drive
off.
An icon with a Check Control message appears
on the control display.
7. "Perform reset".
8. Drive off.
Icon
Possible cause
The wheels are shown in gray and the tire
pressure is reset.
Leak detected on the tire.
Inflation was not carried out ac-
cording to specifications, for in-
stance when the tire has not been
sufficiently inflated or in the case of
a natural steady tire pressure loss.
After a travel time of several minutes, the set
tire inflation pressures are accepted as the
predefined tire inflation pressures. The reset is
completed automatically while driving.
After resetting, the wheels are shown in green
on the control display and a message appears.
Measure
You may interrupt this trip at any time. When
you continue driving the reset resumes auto-
matically.
Check the tire pressure and correct as needed.
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Wheels and tires
MOBILITY
Runflat tires are labeled with a circular icon
containing the letters RSC marked on the
tire sidewall.
If the tire inflation pressure is too low
Message
Runflat tires, refer to page 311.
A yellow warning light is illuminated in
the instrument cluster.
3. Read the description on what to do in case
of a flat tire.
In addition, an icon with a Check Control mes-
sage appears on the control display.
Actions in the event of a flat tire, refer to
page 321.
Icon
Possible cause
Messages: for tires with special
approval
There is a tire pressure loss.
General information
When a flat tire is indicated, the Dynamic Sta-
bility Control may be turned on.
Measure
1. Reduce the vehicle speed. Do not exceed a
speed of 80 mph/130 km/h.
Safety information
2. At the next opportunity, for instance at a fill-
ing station, check the tire inflation pressure
in all four tires and correct if necessary.
Warning
A damaged regular tire with low or no tire
inflation pressure impacts handling such as
steering and braking response. Runflat tires
can maintain limited stability. There is a risk
of accident, injury, and property damage. Do
not continue driving if the vehicle is equipped
with normal tires. Follow the information on
runflat tires and continued driving with these
tires.
If there is a significant tire pressure
loss
Message
A yellow warning light is illuminated in
the instrument cluster.
In addition, an icon with the affected tire ap-
pears in a Check Control message on the con-
trol display.
If a tire inflation pressure check is
required
Icon
Possible cause
There is a flat tire or a major tire
pressure loss.
Message
An icon with a Check Control message appears
on the control display.
Measure
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu-
vers.
2. Check whether the vehicle is fitted with
standard tires or runflat tires.
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Wheels and tires
MOBILITY
Measure
Icon
Possible cause
1. Reduce the vehicle speed. Do not exceed a
speed of 80 mph/130 km/h.
Inflation was not carried out ac-
cording to specifications, e.g., the
tire has not been sufficiently in-
flated.
2. At the next opportunity, for instance at a fill-
ing station, check the tire inflation pressure
in all four tires and correct if necessary.
The system has detected a wheel
change, but no reset was done.
3. Perform a system reset.
The tire inflation pressure has
fallen below the level of the last re-
set.
If there is a significant tire pressure
loss
No reset was performed for the
system. The system issues a
warning based on the tire inflation
pressures stored during the last re-
set.
Message
A yellow warning light is illuminated in
the instrument cluster.
In addition, an icon with the affected tire ap-
pears in a Check Control message on the con-
trol display.
Measure
1. Check the tire pressure and correct as
needed.
Icon
Possible cause
2. Perform a system reset.
If the tire inflation pressure is too low
Message
There is a flat tire or a major tire
pressure loss.
No reset was performed for the
system. The system issues a
warning based on the tire inflation
pressures stored during the last re-
set.
A yellow warning light is illuminated in
the instrument cluster.
In addition, an icon with a Check Control mes-
sage appears on the control display.
Measure
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu-
vers.
Icon
Possible cause
There is a tire pressure loss.
2. Check whether the vehicle is fitted with
standard tires or runflat tires.
No reset was performed for the
system. The system issues a
warning based on the tire inflation
pressures stored during the last re-
set.
Runflat tires are labeled with a circular icon
containing the letters RSC marked on the
tire sidewall.
Runflat tires, refer to page 311.
3. Read the description on what to do in case
of a flat tire.
Actions in the event of a flat tire, refer to
page 321.
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Wheels and tires
MOBILITY
Contact an authorized service center or an-
other qualified service center or repair shop.
Actions in the event of a flat tire
Standard tires
1. Identify the damaged tire.
Maximum speed
Check the tire pressure in all four tires,
for instance using the tire pressure display
of a flat tire kit.
You may continue driving with a damaged tire
at speeds up to 50 mph/80 km/h.
Continued driving with a flat tire
For tires with special approval: when the
tire pressure in all four tires is correct, the
Tire Pressure Monitor may not have been
reset. In this case, perform the reset.
Follow the following when continuing to drive
with a damaged tire:
1. Avoid sudden braking and steering maneu-
vers.
If no tire damage can be identified, con-
tact an authorized service center or another
qualified service center or repair shop.
2. Do not exceed a speed of
50 mph/80 km/h.
2. Repair the flat tire, e.g., with a flat tire kit or
by changing the wheel.
3. Check the tire inflation pressure in all four
tires at the next opportunity.
Using sealant, e.g., from the flat tire kit, may
damage the air pressure sensor. Replace the
air pressure sensor at the next opportunity.
Possible driving distance with a flat tire
The possible driving distance which may be
safely traveled varies depending on how the
vehicle is loaded and used, e.g., speed, road
conditions, outside temperature. The distance
traveled may be less but may also be more if
an economical driving style is used.
Runflat tires
Safety information
Warning
If the vehicle is loaded with an average
weight and used under favorable conditions,
the possible distance traveled may be up to
50 miles/80 km.
The vehicle handles differently when a runflat
tire has insufficient or no tire pressure; for
instance, reduced directional stability when
braking, braking distances are longer and the
self-steering properties will change. There is
a risk of accident, injury, and property dam-
age. Drive moderately and do not exceed a
speed of 50 mph/80 km/h.
Vehicle handling with damaged tires
Vehicles driven with a damaged tire will han-
dle differently, potentially leading to conditions
such as the following:
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Greater likelihood of skidding of the vehicle.
Longer braking distances.
Warning
Changed self-steering properties.
Vibrations or loud noises while driving can
indicate the final failure of a tire. Tire compo-
nents may come loose. There is a risk of ac-
cident, injury, and property damage. Reduce
your speed and stop. Do not continue driving.
Modify your driving style. Avoid abrupt steering
or driving over obstacles, for instance curbs or
potholes.
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Wheels and tires
MOBILITY
tem automatically reactivates after leaving
the area of the interference.
System limits
Temperature
The tire inflation pressure depends on the
tire's temperature.
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For tires with special approval: the system
was unable to complete the reset. Perform
a system reset again.
If the Tire Pressure Monitor malfunctions:
Have the vehicle checked by an authorized
service center or another qualified service
center or repair shop.
Driving or exposure to the sun will increase the
tire temperature, thus increasing the tire infla-
tion pressure.
The tire inflation pressure is reduced when the
tire temperature falls again.
Declaration according to NHTSA/
FMVSS 138 Tire Pressure Monitoring
System
These circumstances may cause a warning
when temperatures fall very sharply.
Following a temperature-related warning, the
target pressures are displayed on the control
display again after a short distance.
Each tire, including the spare (if provided)
should be checked monthly when cold and in-
flated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If the
vehicle has tires of a different size than the
size indicated on the vehicle placard or tire
inflation pressure label, you should determine
the proper tire inflation pressure for those
tires.) As an added safety feature, the vehi-
cle has been equipped with a tire pressure
monitoring system (TPMS) that illuminates a
low tire pressure telltale when one or more
of your tires is significantly under-inflated. Ac-
cordingly, when the low tire pressure telltale
illuminates, you should stop and check your
tires as soon as possible, and inflate them to
the proper pressure. Driving on a significantly
under-inflated tire causes the tire to overheat
and can lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life, and
may affect the vehicle's handling and stopping
ability. Please note that the TPMS is not a
substitute for proper tire maintenance, and it
is the driver's responsibility to maintain correct
tire pressure, even if under-inflation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale. The vehicle
has also been equipped with a TPMS malfunc-
tion indicator to indicate when the system is
not operating properly. The TPMS malfunction
indicator is combined with the low tire pres-
Sudden tire pressure loss
The system cannot indicate sudden and se-
rious tire damage caused by external circum-
stances.
Failure performing a reset
Tires with special approval: the system will not
function correctly if a reset was not performed,
for example a flat tire may be indicated al-
though the tire inflation pressures are correct.
Malfunction
Message
The yellow warning light flashes and is
then illuminated continuously. A Check
Control message is displayed. It may
not be possible to identify tire pressure losses.
Measure
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A wheel without air pressure sensor is
mounted: Have the wheels checked as
needed.
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Fault caused by systems or devices with
the same transmission frequency: The sys-
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MOBILITY
sure telltale. When the system detects a mal-
function, the telltale will flash for approximately
one minute and then remain continuously il-
luminated. This sequence will continue upon
subsequent vehicle start-ups as long as the
malfunction exists. When the malfunction indi-
cator is illuminated, the system may not be
able to detect or signal low tire pressure as
intended. TPMS malfunctions may occur for a
variety of reasons, including the installation of
replacement or alternate tires or wheels on the
vehicle that prevent the TPMS from function-
ing properly. Always check the TPMS malfunc-
tion telltale after replacing one or more tires
or wheels on the vehicle to ensure that the re-
placement or alternate tires and wheels allow
the TPMS to continue to function properly.
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After a tire or wheel change, an initialization
was carried out at the correct tire pressure.
After the tire pressure was adjusted to a
new value, an initialization was performed.
Status display
The current status of the flat tire monitor can
be displayed, e.g., whether the flat tire monitor
is active.
1.
Apps menu
2. "Vehicle"
3. "Vehicle status"
4. "FLAT TIRE MONITOR"
The status is displayed.
Initialization required
An initialization must be performed in the fol-
lowing situations:
Flat tire monitor
▷
After the tire inflation pressure has been
adjusted.
Principle
The flat tire monitor detects a tire pressure
loss while driving and issues a warning if the
tire pressure has dropped.
▷
After a tire or wheel change.
Performing initialization
When initializing, the set tire inflation pressures
serve as reference values in order to detect a
flat tire. Initialization is started by confirming
the tire inflation pressures.
General information
The system detects tire pressure loss on the
basis of rotation speed differences between
the individual wheels while driving.
Do not initialize the system when driving with
snow chains.
In the event of a tire pressure loss, the diam-
eter and therefore the rate of rotation of the
corresponding wheel changes. The difference
will be detected and reported as a flat tire.
1.
Apps menu
2. "Vehicle"
The system does not measure the actual infla-
tion pressure in the tires.
3. "Vehicle status"
4. "FLAT TIRE MONITOR"
5. Turn on drive-ready state and do not drive
off.
Functional requirements
The following prerequisites must be met for
the system; otherwise, reliable notification of a
tire pressure loss is not assured:
6. "Perform reset"
7. Drive off.
The initialization is completed while driving,
which can be interrupted at any time.
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