Body, generic

B0084 Second Row Center Seat Belt Load Limiter Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0084 names a squib-switched force limiter for the middle rear seat. Neither a carmaker nor a bulletin shows it with that meaning, and the hardware is rare: NHTSA's 2013 evaluation reports load limiters as standard only at the outer front seats, and the rear centre belt is often a plain retractor. A Delphi patent for rear seats without airbags instead chooses between roughly 4–6 kN and 2–3 kN purely mechanically, with no firing loop at all. Owners usually meet B0084 through GM. The 2011 Saab 9-4X, a Global A design, stores it for the right front impact sensor, set after ten seconds of a short, open or bad data; PI1480 covers it on the 2015 Colorado/Canyon. Saab 9-3 and 9-5 modules use it for the driver seat position sensor and then disable the driver airbag's second stage.

Likely causes

On GM vehicles, fault at the right front impact sensor or its plug (different meaning)
On Saab 9-3/9-5, open or short in the driver seat position sensor circuit (different meaning)
Damaged lead to a centre rear limiter where one is fitted

Symptoms

  • Airbag warning lamp on
  • On Saab 9-3/9-5 the second stage of the driver airbag is disabled
  • 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

second row center load limitersquib circuitsrs control module

Related codes

B0074B007DB0083B0085

References: saabwisonline.com, saabwisonline.com, crashstats.nhtsa.dot.gov, patents.google.com.