BMW X5 xDrive45e PLUG-IN HYBRID 2022, Owner'S Manual

Page: 381 / 444

placement or alternate tires and wheels allow
the TPMS to continue to function properly.
Flat tire monitor
Principle
The flat tire monitor detects a tire pressure
loss while driving and issues a warning if the
tire pressure has dropped.
General information
The system detects tire pressure loss on the
basis of rotation speed differences between
the individual wheels while driving.
In the event of a tire pressure loss, the diame-
ter and therefore the rotational speed of the
corresponding wheel changes. The difference
will be detected and reported as a flat tire.
The system does not measure the actual infla-
tion pressure in the tires.
Functional requirements
The following prerequisites must be met for
the system; otherwise, reliable notification of a
tire pressure loss is not assured:
▷ After a tire or wheel change, an initialization
was performed with the correct tire inflation
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. "CAR"
2. "Vehicle status"
3. "Flat Tire Monitor"
The status is displayed.
Initialization required
An initialization must be performed in the fol-
lowing situations:
▷ After the tire inflation pressure has been
adjusted.
▷ 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.
Do not initialize the system when driving with
tire chains.
1. "CAR"
2. "Vehicle status"
3. "Flat Tire Monitor"
4. Turn on drive-ready state and do not drive
off.
5. Start the initialization with: "Perform reset"
6. Drive off.
The initialization is completed while driving,
which can be interrupted at any time.
The initialization automatically continues when
driving continues.
Messages
General information
When a flat tire is indicated, the Dynamic Sta-
bility Control (DSC) is turned on, if needed.
Safety information
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. Do not continue driving if the
vehicle is equipped with normal tires. Follow
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Wheels and tires MOBILITY
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Online Edition for Part no. 01405A604A9 - VI/22