The concept
The system does not measure the actual inflation pressure in the tires.
It detects a pressure loss in a tire by comparing the rotational speeds of the individual wheels while moving.
In the event of a pressure loss, the diameter and therefore the rotational speed of the corresponding wheel change. This is detected and reported as a flat tire.
See also:
Safety
The X3 earned a 2009 Top Safety Pick designation from the Insurance Institute
for Highway Safety, the agency's highest award. That means it earned top scores
in IIHS' frontal-offset, side-impact a ...
Loss of the remote controls
Lost remote controls can be blocked by your
service center. ...
Vehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equipment
is also described that is not available in a vehicle, ...