BMW X5 - CATALOGUE, Owner'S Manual

Page: 366 / 440

Starting with the permissible maximum speed
with snow chains of 30 mph/50 km/h the rear
axle steering will be switched on again automati‐
cally.
Tire pressure monitor
Principle
The Tire Pressure Monitor monitors the tire
pressure and issues a warning if the tire pressure
has dropped.
General information
Sensors in the tire valves measure the tire infla‐
tion pressure and tire temperature.
Using the tire settings in iDrive, the system can
automatically compare the predefined target
pressures with the actual tire inflation pressures.
If tires are being used that are not specified on
the tire inflation pressure details on the vehicle,
such as tires with special approval, the system
needs to be actively reset. The system will then
take over the actual tire inflation pressures as the
target pressures.
When operating the system, also note the infor‐
mation found in the Tire inflation pressure chap‐
ter.
Additional information:
Tire inflation pressure, refer to page
348 .
Safety information
Warning
The display of the target pressures is not a
substitute for the tire inflation pressure details
on the vehicle. Incorrect entries in the tire set‐
tings can lead to incorrect target tire inflation
pressure values. In this case, it cannot be guar‐
anteed that the notification of a tire pressure
loss will be reliable. There is a risk of injury and
risk of damage to property. Ensure that the tire
sizes of the mounted tires are displayed cor‐
rectly and match the details on the tires and on
the vehicle.
Functional requirements
The following conditions must be met for the
system; otherwise, reliable message of a tire
pressure loss is not assured:
▷ Every time a tire or wheel is changed, the
correct details on the mounted tires must be
entered in the tire settings.
▷ The Tire Pressure Monitor does not activate
until after driving for a few minutes:
▷ After a tire or wheel replacement.
▷ After a reset, for tires with special appro‐
val.
▷ After changing the tire setting.
▷ For tires with special approval:
▷ After a tire or wheel replacement, a reset
was performed with the correct tire infla‐
tion pressure.
▷ After the tire inflation pressure was ad‐
justed to a new value, a reset was per‐
formed.
▷ Wheels with wheel electronics.
Tire settings
General information
The tire sizes of the mounted tires can be gath‐
ered 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 en‐
tered last are stored. After a tire or wheel re‐
placement, the settings of the tire sets used last
can be selected.
Changing settings
1. "CAR"
2. "Vehicle status"
Seite 366
MOBILITY
Wheels and tires
366
Online Edition for Part no. 01405A37D22 - VI/21