Body, generic

B00F1 Passenger Inflatable Seat Belt Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00F1 is the front passenger counterpart of B00F0, reserved for an inflatable belt at that seat. No manufacturer documents it, and no series vehicle is publicly known to have a passenger inflatable belt; Mercedes' S-Class manual offers the beltbag only for the outer rear belts. A passenger version would still face the same engineering choices as the patents show: Allied Chemical patented as early as 1972 a buckle that routes gas from a floor-mounted inflator through tongue and buckle into lap and shoulder belt, so the belt itself needs no wires, while Autoliv's 2002 design mounts separate inflators on the seat back. The airbag module would watch the igniter loop and set B00F1 for an open, a short or bad resistance.

Likely causes

Module coded for a passenger inflatable belt that the car does not have
Connector at the buckle-side inflator under the passenger seat loose
Seat wiring damaged by objects under the seat or by seat movement

Symptoms

  • Airbag lamp lit in the cluster
  • Passenger belt cannot inflate in a crash
  • Safety note: pyrotechnic belt inflator – disconnect the battery, respect the wait time and have repairs done by a specialist workshop

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–1,200
Time0.5–3 h

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

Parts involved

passenger inflatable beltsquib circuitsrs control module

Related codes

B00F0B0072B007FB0052

References: patents.google.com, patents.google.com, mbusa.com.