Tire Pressure Monitor (TPM) System

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NOTE: If a tire pressure has been adjusted, or a wheel or tire has been replaced, the TPM or FTM system must be reinitialized. See appropriate tire pressure monitor system under RESET PROCEDURES .

NOTE: 5-Series and 6-Series models are equipped with one of either of the two types of tire pressure monitor systems:

The Flat Tire Monitor (FTM) system , which uses the ABS system to measure each tire's rolling radius changes and with it, the rotational speed of the wheels. Changes are detected and signaled as a flat tire. The Flat Tire Monitor (FTM) system does not use tire pressure sensors installed in the tires.
The Tire Pressure Monitor (TPM) system , uses tire pressure sensors installed in the tires to check the tire inflation pressure in the four mounted tires. The system indicates if the tire inflation pressure has dropped considerably in one or several tires.