Quote:
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Originally Posted by sleepless
I have a 05 X5 w/ TPMS ....... does anyone know if the 05 had the built in Sensors in the wheel or did it use the ABS system (relative tire rotation speed) to drive the TPMS, so there are no separate sensors on each wheel...??????????????  |
I have 06 and it is ABS based system that monitors wheel spinning
I dont think that TPMS was ever option on E53
Quote from manual:
Flat Tire Monitor
The concept
The Flat Tire Monitor keeps track of the
inflation pressures in the four fitted tires
as you drive. The system provides an
alert whenever the inflation pressure
drops significantly in relation to the
pressure another tire.
The check of the tire inflation pressure
is based on monitoring the relative
speeds of the wheels. A flat is detected
and reported on the basis of a deviation
in certain speed ratios.
Functional requirement
To ensure reliable operation, the system
should have been initialized with
the correct tire inflation pressure.