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B1127 on the 2009 Mazda Mazda6

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.

Bulletins for this model year that name B1127
08-001-252025-06-04. Service bulletin. Some vehicles may experience an airbag system warning light flashing with DTC B1126:1B or B1127:1B. DTC B1126:1B - Driver-side side air bag module circuit resistance high. DTC B1127:1B - Passenger-side side air bag module circuit resistance high. This may be caused by coating on the terminals allowing oxidation. The new terminals have a tin coating to prevent oxidation.

1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.