Airbag light: It indicates that the airbag is not operational due to some problem with the electrical system.
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This light may appear on the dashboard with the initials "SRS" (Supplemental Restraint System). It comes on when the control unit detects some problem in the electrical system of the airbag and disables it as a preventive measure. If that happens, a specialist should take care of it.
You need to get it scanned to get the error code. Have you been in an accident, or have the airbags ever deployed? Depending on the type of error, you might be able to clean it and get it solved.