Body, generic

B0087 Third Row Center Seat Belt Load Limiter Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0087 would flag the igniter circuit of an adaptive belt force limiter on the centre position of row three. That combination is close to theoretical: no carmaker documents the code, and NHTSA's 2013 study dates universal fitment of load limiters (by model year 2007) only for the front outboard seats. Joyson describes how such a unit works, with linear limiters tuned to a vehicle's crash pulse and dual-stage versions for adaptive or degressive force. On GM Global A vehicles (2011 Saab 9-4X) B0087 means the left rear side impact sensor. GM sets it after ten seconds of a fault, or when the module hears nothing from the sensor for over 375 ms. A history code there clears after 100 fault-free ignition cycles. Check the make first.

Likely causes

On GM vehicles, left rear side impact sensor or its connector faulty (different meaning)
Damaged lead to a third-row centre limiter where fitted

Symptoms

  • Airbag warning lamp on
  • On GM vehicles the AIR BAG indicator is lit by the cluster at the module's request
  • Safety note: airbag system with pyrotechnic parts; diagnose only de-energised at a specialist workshop

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–700
Time0.5–2.5 h

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

Parts involved

third row center load limitersquib circuitsrs control module

Related codes

B0077B0086B0088

References: saabwisonline.com, crashstats.nhtsa.dot.gov, joysonsafety.com.