Body, generic

B0080 Driver Seat Belt Load Limiter Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0080 reports a fault in the firing loop that switches the driver's belt force limiter. In adaptive retractors a small squib, fired by the airbag module, changes the level at which the webbing is paid out, so the chest load suits crash severity and occupant. Mercedes-Benz uses the code exactly so: topic LI54.21-P-070658 (cars of the 177, 118 and 247 series) gives B008013 for an interrupted igniter of the driver's belt force limiter, traced to raised resistance at the airbag module plug. Ford names B0080 among the restraint module codes cured by reprogramming on 2017–2018 Fusion/MKZ, without giving its meaning. Older GM-built Saabs (9-3, 9-5) use B0080 for an internal fault of the driver-side B-pillar or side impact sensor instead. With the code set, the airbag lamp is lit.

Likely causes

Raised contact resistance at the airbag module connector (Mercedes LI54.21-P-070658)
Chafed or disconnected lead to the driver's retractor at the B-pillar
Restraint module software needing an update (Ford Fusion/MKZ)
Internal fault of the load limiter squib in the retractor

Symptoms

  • Airbag warning lamp on, sometimes with an SRS message in the cluster
  • Driver's belt keeps only its basic force limiting level in a crash
  • Safety note: pyrotechnic part in the driver's retractor; work only de-energised (battery off, wait time) at a specialist workshop

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–900
Time0.5–3 h

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

Parts involved

driver load limitersquib circuitsrs control module

Related codes

B0079B007EB0081B0082

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, patents.google.com.