B007B code meaning
Second Row Left Seat Belt Pretensioner B Deployment Control
What B007B means
B007B would cover a second pretensioner on the outboard left seat in row two, for example a lap tensioner in addition to the retractor unit. No manufacturer publishes B007B. The documented rear cases use other slots: Mitsubishi files its left rear retractor pretensioner under B0073, and Mercedes logs the left rear emergency tensioning retractor as B00E3, the C-stage code. Joyson's lap pretensioner shows the kind of hardware a B stage could stand for, since it is meant to fire alongside a retractor pretensioner. In IIHS crash tests that placed a dummy behind the driver, submarining showed up in some vehicles with rear pretensioners, which is the risk such a lap device addresses. A stored B007B keeps the airbag lamp lit and leaves that stage inactive.
B007B at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B007B
- Airbag warning lamp on
- Left rear lap belt not tightened in a crash
- Safety note: pyrotechnic part at the rear seat; work only de-energised (battery off, wait) and at a specialist workshop
Common causes of B007B
- Most likelyPlug of the left rear lap or anchor tensioner disturbed when the bench was removed
- PossibleAirbag module coded for a rear B-stage tensioner that is not fitted
- Less likelyFloor harness to the left rear seat damaged
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Second row left pretensioner bSquib circuitSRS control module
What each part of B007B means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7B | The exact fault in that area. |
What to do next
- Note B007B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B007B
What does B007B mean?
B007B means "Second Row Left Seat Belt Pretensioner B Deployment Control". B007B would cover a second pretensioner on the outboard left seat in row two, for example a lap tensioner in addition to the retractor unit. It is a generic code, so it means the same on every make.
Is it safe to drive with B007B?
B007B does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B007B fail an emissions test?
B007B is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B007B to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B007B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.