See also:

Vehicle event data (Black box)
Your vehicle's driving and safety systems employ computers that monitor, and share with each other, information about your vehicle's operation. One or more of these computers may store what they m ...

Reporting safety defects in the U.S.
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTS ...

Limitations
Main channel vs. sub-channels (FM only): The main channel is the only channel that can receive in hybrid mode (both digital and analogue). If a frequency has subchannels, they are broadcast i ...