X Series E83 X3 3.0d (M57T2) OFFRD
![background image](/bmw/X_Series_E83/X3_3.0d_M57T2_OFFRD/page-2080001.png)
VS-23/Starringer
Baugruppe/Group: 36
360299(469)
weltweit
All countries
08/1999
Tyres with emergency running characteristics and tyre pressure warning systems
All models
General information
Warning systems
BMW AG offers two different systems to warn the driver of a drop in tyre pressure.
System
Description
Measuring principle
RDC
Tyre pressure control
Tyre pressure/temperature
RDW
Tyre pressure warning
Comparison of wheel speeds
Emergency running systems
In addition to the warning systems, two emergency running systems are also employed to prevent a depressurised
tyre from caving in:
Components of emergency running system with self-supporting tyres:
RDW (standard equipment)
Tyre pressure warning
RDC (available as option from 03/2000)
Tyre pressure control
SST
Self Supporting Tyre
EH2 disc wheel
Disc wheel with Extended Hump 2
Components of emergency running system with integrated support ring:
Support ring
Note:
In the future, only for heavy safety vehicles
(E38/3)
RDC (optional)
Tyre pressure control
H2 disc wheel
Standard disc wheel with Hump 2
Tyre pressure control (RDC)
RDC system description
RDC permanently monitors the tyre pressure and the temperature in the tyres, both while the vehicle is being driven
and when it is stationary. Data is transmitted via data telegram by the wheel electronic units to the antennas installed
in the wheel housing and on to the RDC control unit. There, the data received is compared with the stored limit
values.
After correcting the air pressure with the engine off and the ignition on, press the Set button and hold (approx. 6
seconds) until the words "Set tyre pressure" appear in the instrument cluster (instrument cluster high) or the yellow
LED lights up (basic instrument cluster).
If the limit values are exceeded, the driver will be warned via the instrument cluster in two stages, as follows:
Loss of tyre pressure
Warning
SBT Tyres with emergency running characteristics and tyre pressure warning systems A
BMW AG - TIS
14.02.2013 01:43
Issue status (12/2007) Valid only until next DVD is issued
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