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B101C on the 2020 Audi S8

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 B101C
A6924162056421_92024-11-06. Service bulletin. This bulletin provides information when the seat belt and pre sense warnings appear intermittently while driving; DTC B101C07 stored in the airbag module.
A6924072056421_82024-03-06. Service bulletin. This bulletin provides information for when there is a seat belt warning, or a pre-sense warning that appears sporadically while driving; DTC B101C07 is stored in the airbag module.
A6921752056421_62022-01-06. Service bulletin. This informational bulletin contains instructions on when DTC B101C07 is stored in the airbag control module/ safety computer.
A6921732056421_52021-12-07. Service bulletin. This informational bulletin contains instructions on when DTC B101C07 is stored in the airbag control module/ safety computer.
A6921682056421_42021-09-03. Service bulletin. This informational bulletin contains instructions on when DTC B101C07 is stored in the airbag control module/ safety computer.

5 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.