B0071First Row Center Seat Belt Pretensioner Deployment Control
- Generic OBD-II code · Body
- How the car detects it
- B0071 is reserved for a pretensioner at the middle seat of the first row, which exists only where a three-person front bench is fitted. The airbag module would watch this squib like any other firing loop and flag an open, a short or a resistance outside its window. No carmaker publishes B0071 with this meaning. Mercedes-Benz does show that such a device can be present: its information LI54.21-P-070658 (A-, CLA-, GLB-Class) lists an open circuit at the emergency tensioning retractor in the centre of the first seat row, but files it under its own code B1B36. GM places buckle pretensioners at the inner flank of a front seat. In the airbag modules of the Saab 9-3 (2003, 2007), B0071 stands for a short in the passenger curtain or rollover-bar circuit, a different part altogether.
- What you may notice
- Airbag warning lamp on
- Middle front occupant gets no belt pretensioning in a crash
- Safety note: pyrotechnic component; disconnect the battery, wait the specified time and leave the work to a specialist workshop
- Likely causes
- LikelyPlug under the front bench centre seat loose or corroded
- PossibleHarness damaged when the centre seat or console is folded or removed
- RareAirbag module configured for a centre pretensioner the vehicle does not have
- RareInternal fault of the centre pretensioner
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.