Body, generic

B009E Right Side Restraints Sensor 5

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B009E stands for a fifth crash sensor on the vehicle's right flank. No carmaker documents this code publicly: Mitsubishi's airbag index ends its right row with the C-pillar unit B0098, and the NHTSA bulletin index shows no entry for B009E at all. A fifth right-hand sensor would mostly make sense on long bodies, vans with sliding doors or vehicles with extra seat rows. Two sensing principles are on offer: Bosch's peripheral pressure sensor sits in a door cavity and reacts when the crushed door raises the air pressure, while satellites such as Continental's gSAT pick up the shock in stiff structure. FMVSS 214 shows why several are needed, because a pole can hit the flank at many points. With B009E stored the airbag lamp is on and deployment near that sensor may come late.

Likely causes

Open, shorted or corroded line or plug to the fifth right sensor, often after door or trim work
Internal fault of the fifth right crash sensor (pressure or acceleration type)
Airbag control unit coded for a sensor that the vehicle does not have

Symptoms

  • Airbag warning lamp on
  • Side and curtain airbags on the right may react later in the area of that sensor
  • Safety note: airbag system; unplug sensors only with the ignition off, battery disconnected and wait time observed; after replacement have the configuration checked, specialist workshop only

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–500
Time0.5–3 h

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

Parts involved

right side restraints sensor 5srs wiringsrs control module

Related codes

B009DB009FB009BB0098

References: mitsubishitechinfo.com, law.cornell.edu, bosch-mobility.com, aapexshow.com.