Body, generic

B0085 Second Row Right Seat Belt Load Limiter Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0085 points to the igniter circuit that would change the force level of the right rear belt. No maker documents it with that meaning. Joyson offers dual-stage limiters with degressive or adaptive behaviour, and an Autoliv patent switches from the stiff to the soft torsion section when the controller fires a squib once cabin deceleration crosses a threshold; in a rear seat such a loop would be watched like any other squib. IIHS rear-seat work found the right rear position tested less often than the left (16 against 27 runs). In practice, B0085 on a GM Global A car (Saab 9-4X 2011) is the left front side impact sensor, reported for shorts, opens, current above 23 mA, internal failure, a wrong part or invalid serial data. Only the make tells which part is meant.

Likely causes

On GM vehicles, left front side impact sensor or its door wiring faulty (different meaning)
Lead to the right rear retractor pinched by seat or trim
Internal fault of the right rear limiter squib

Symptoms

  • Airbag warning lamp on
  • On GM vehicles the code clears from history only after 100 fault-free ignition cycles
  • Safety note: pyrotechnic restraint parts; work only de-energised at a specialist workshop

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–800
Time0.5–3 h

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

Parts involved

second row right load limitersquib circuitsrs control module

Related codes

B0075B007CB0083B0084

References: saabwisonline.com, joysonsafety.com, patents.google.com, iihs.org.