B0043Third Row Left Frontal Stage 3 Deployment Control
- Generic OBD-II code · Body
- How the car detects it
- B0043 completes the left third-row frontal group as its stage 3 element. By analogy with front airbags this can be a vent valve squib, as Mercedes-Benz uses for B000313 and B001213, or a further gas chamber like the third chamber in Breed's patent that is kept for a second collision. No public source ties B0043 to a third-row bag. GM gives the number a separate, documented meaning in its older modules: the Saab 9-5 of 2006 stores B0043 if the driver stage 2 terminal sits above 4.1 V or under 1.0 V for 2 seconds, and the 9-3 splits it into shorts to supply, to ground or to another firing loop. Check which airbag the scan tool names. Airbag lamp on.
- What you may notice
- Airbag warning lamp on
- Third deployment element of this airbag is disabled
- Safety note: do not probe the airbag circuit yourself; unplug airbag connectors only with the battery disconnected and the stated wait time observed
- Likely causes
- PossibleDamaged stage 3 lead or squib
- RareShort between two firing loops in a shared harness
- RareRestraint module configured for equipment the vehicle does not have (wrong part or coding)
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.