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:

    Tire inflation pressure values up to 100 mph/160 km/h
    320i 328i 335i ...

    Important parts of the engine compartment
    1.  Expansion tank for coolant, 2.  Washer fluid filler neck for headlamp cleaning system and window washer system, 3.  Jump-starting connection, 4.  Fluid filler neck for e ...

    Terminating the voice activation system
    Briefly press the button on the steering wheel or ›Cancel‹. ...