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Warning Beeps on 2010 Mazda3

What is the meaning of the persistent warning beeps that occur approximately every minute? The warning beeps began after the car was turned off following a 200 mile trip and are still occurring now. No warning light ever came on. How do I stop them?

What does the Owner’s Manual have to say about this type of situation?

The owner’s manual indicates a warning beep and warning light indicates a malfunction in the front seat belt pretensioner system. However, no warning light and the beep has persisted longer than the specified 35 minutes.

I would suggest a trip to the Mazda dealership tomorrow.
If, as I suspect, the car is still under warranty, they will take care of the problem without charge.