See also:

Tire identification marks
Tire size 255/50 R 19 103 Y 255: nominal width in mm 50: aspect ratio in % R: radial tire code 19: rim diameter in inches 103: load rating, not for ZR tires Y: speed rating, before the R on ZR ...

Navigation data
General informationNavigation data and authorization codes are available from your BMW center. Navigation data are stored in the vehicle and can be updated. > Depending on the data volume, a dat ...

Functional requirements
The system must have been initialized when the tire inflation pressure was correct; otherwise, reliable signaling of a flat tire is not ensured. Initialize the system after each correction of th ...