The airbag light on and off and then on most of the time. I'm unsure of the issue and feel it's an auto defect.

While nothing happened, on recent one day, the SRS airbag keeps illuminating and sometimes with alarm during drive after the car was lighted. I definitely was very annoying as this problem will not occur generally for most cars used over 10 ten even more years. Therefore, I definitely need support and repaired, I don't know why this occur.