Flat Tire Monitor - BMW 525i Owner's Manual

leveling suspension. Stop and check the vehi-
cle. If it is considerably lower at the rear than at
the front, and possible also on one side – rear
left compared to rear right –, go to the nearest
BMW center or a workshop that works accord-
ing to BMW repair procedures with correspond-
ingly trained personnel. Drive with appropriate
caution in the meantime. The vehicle has
reduced ground clearance and driving comfort
may be noticeably reduced. Even if the position
of the vehicle is normal, go to the nearest BMW
center or a workshop that works according to
BMW repair procedures with correspondingly
trained personnel.

Flat Tire Monitor

The concept
The Flat Tire Monitor keeps track of the infla-
tion pressures in the four mounted tires as you
drive. The system provides an alert whenever
the inflation pressure drops significantly in rela-
tion to the pressure in another tire.
In the event of a pressure loss, the rolling radius
and therefore the rotation speed of the wheels
change. This change is detected and is
reported as a flat tire.
Functional requirement
In order to assure the reliable reporting of a flat
tire, the system must be initialized for the cor-
rect tire inflation pressure.
Perform the initialization immediately
after correcting the inflation pressure,
after changing a tire or after changing a wheel or
all of the wheels.<
System limits
The Flat Tire Monitor cannot indicate
sudden severe tire damage caused by
outside factors and does not detect a natural,
even pressure drop in all four
Online Edition for Part-No. 01 41 0 159 251 © 03/05 BMW AG
In the following situations, the system could be
delayed or malfunction:
>
>
>
>
When you are driving with the compact wheel
the Flat Tire Monitor is unable to function.
Initializing system
When driving resumes, the initialization is con-
tinued automatically. When driving with snow
chains
tialize the
iDrive, for concept, refer to page 16.
1.
2.
3.
4.
tires.<
5.
System has not been initialized
Driving on snowy or slippery road surface
Sporty driving style: slip in the drive wheels,
high lateral acceleration
Driving with snow chains
The initialization finishes during driving,
which can be interrupted at any time.
*
or with the compact wheel
system.<
Press the button.
This opens the start menu.
Press the controller to open the menu.
Select "Vehicle settings" and press the
controller.
Select "FTM" and press the controller.
Start engine, but do not start driving.
*
*
*
, do not ini-
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