Body, generic

B0032 Second Row Left Frontal Stage 2 Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0032 concerns a second igniter for the rear-seat frontal airbag on the left. A second stage lets the module add gas later or skip it, depending on crash severity and on who sits behind the seat; a Mercedes-Benz filing for a backrest-mounted rear airbag allows separate deployment devices for its chambers so they can fire in sequence. In that car the rear bag's tube frame is filled with compressed gas while its centre takes in outside air. No published DTC table assigns B0032 to this use. GM's Global A modules give the number to the left rear belt pretensioner: the Saab 9-4X 2011 sets it after 2 seconds of a short, an open, above 4.2 ohms or below 1.4 ohms. Airbag lamp on.

Likely causes

Loose or corroded connector of the airbag lead routed through the front seat backrest
Open or short only in the stage 2 pair of wires to the rear airbag
Faulty second igniter inside the rear-seat airbag module
Restraint module configured for equipment the vehicle does not have (wrong part or coding)

Symptoms

  • Airbag warning lamp on
  • Rear-seat airbag may inflate with less force or not at all
  • Safety note: do not probe the airbag circuit yourself; unplug airbag connectors only with the battery disconnected and the stated wait time observed

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–1,200
Time1–4 h

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

Parts involved

second row left frontal airbagsquib circuitsrs seat wiringsrs control module

Related codes

B0031B0033B003A

References: patents.google.com, carexpert.com.au, saabwisonline.com.