B0077Third Row Center Seat Belt Pretensioner Deployment Control
- Generic OBD-II code · Body
- How the car detects it
- B0077 stands for the pretensioner at the middle seat of the third row. Hardly any vehicle fits one, and no manufacturer documents B0077 with this J2012 meaning; Mercedes, which equips some models with third-row tensioning retractors, lists only a left and a right unit (B00E7/B00E6). The number is met more often in older GM-built Saabs. The 2006 Saab 9-5 stores B0077 when the airbag module cannot communicate with the driver-side side-impact sensor because of an open or a short, and Saab 9-3 modules of 2003 and 2007 use it for the driver-side B-pillar sensor. On such cars the fault lies in the door or pillar sensor, not in a rear belt. For a genuine third-row centre pretensioner, a stored code means a lit airbag lamp and a disabled unit.
- What you may notice
- Airbag warning lamp on
- On Saab, side airbag deployment on the driver side may be impaired
- Safety note: airbag sensors and pretensioners belong to the pyrotechnic restraint system; work only de-energised and at a specialist workshop
- Likely causes
- LikelyOn older Saab 9-3/9-5, fault at the driver-side side-impact or B-pillar sensor (older GM meaning)
- PossiblePlug of the third-row centre pretensioner disturbed during seat folding or removal
- RareAirbag module coded for a centre pretensioner that is not installed
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.