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:
Going & Stopping
The xDrive28i's 3.0-liter, inline-six-cylinder engine is unexpectedly stout,
and it makes this two-ton crossover pretty quick; BMW cites a zero-to-60-mph
acceleration time of 6.7 seconds, and you ...
Checking the pressure
Only check the tire inflation pressure when the
tires are cold. This means after a maximum of
1.25 miles/2 km driving or when the vehicle has
been parked for at least 2 hours. When the tires
a ...
Setting the voice dialog
You can set whether the system should use the
standard dialog or a shorter version.
In the shorter variant of the voice dialog, the announcements
from the system are issued in an
abbreviated fo ...