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B100B on the 2020 Audi Q5 e

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 B100B
A6924092072349_22024-06-25. Service bulletin. The airbag warning light on, DTCs B100A1B, B100B1B.
A6924092072349_22024-06-25. Service bulletin. The airbag warning light on, DTCs B100A1B, B100B1B.

2 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.