When a Mazda CX-5 takes a hard hit or is involved in a collision, the SAS Unit—your vehicle’s airbag control module—logs the event and locks itself. This stored crash data is important for diagnostics and safety reviews, but it also causes the airbag warning light to stay on long after damaged parts have been repaired or replaced. Standard code clearing won’t fix it, because the crash information is written into the module’s non-volatile memory, where normal scan tools can’t erase it.