Body, generic

B007B Second Row Left Seat Belt Pretensioner B Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Plug of the left rear lap or anchor tensioner disturbed when the bench was removed
Airbag module coded for a rear B-stage tensioner that is not fitted
Floor harness to the left rear seat damaged

Symptoms

  • 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

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–600
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

second row left pretensioner bsquib circuitsrs control module

Related codes

B0073B007CB00E3

References: joysonsafety.com, iihs.org, mitsubishitechinfo.com, static.nhtsa.gov.