Some low‑quality or outdated tools erase only the diagnostic trouble codes (DTCs) without truly wiping the hardware‑level crash signature. The module may then display “No faults” but still refuse to deploy airbags in a subsequent accident. Always use a reputable tool or service; check reviews and ask for a warranty on the reset.
A: For most modules, USB power from your laptop is sufficient. For high-end Mercedes or BMW modules, the new version includes an external 12V adapter. airbagresetsk new