The passenger-side airbag occupancy sensor is the main complaint. The "airbag off" indicator stays lit even when someone sits in the passenger seat, or cycles on and off unpredictably while driving. Some owners report both on and off lights illuminating at the same time. The sensor appears weight-sensitive; some owners note it only activates with heavier passengers (200+ lbs) and remains off for occupants under that threshold. Owners describe the malfunction as sporadic at first, then constant over time.
When taken to dealers, technicians diagnosed internal sensor shorts, pressure-monitor failures, and clock-spring issues. One owner's connector replacement didn't stick—the light came back. Many owners report dealers said they found trouble codes but claimed nothing was wrong, refused to repair the vehicle, or couldn't identify the problem at all.
Separately, multiple owners reported airbag non-deployment during crashes severe enough to total vehicles or cause injuries including fractured neck and concussion. One owner cited an attorney website documenting at least 10 injuries and 1 death linked to Sonic airbag problems. Owners whose airbag warning lights cycle on and off also express fear that a deployment sensor malfunction could leave passengers unprotected in an actual accident. Several owners noted their vehicles were not included in existing recalls despite showing the same symptoms as recalled models.
Failure modes owners describe
Passenger Airbag Occupancy Sensor Malfunction
Passenger-side airbag on/off indicator fails to activate correctly based on seat occupancy. Sensor does not reliably detect passenger presence or weight, remaining illuminated as 'airbag off' even with occupied seat, or displaying both on and off lights simultaneously.
When: Occurs across various mileages from early ownership; owner #13 notes it started sporadic, became constant; owner #14 reports consistent malfunction
Symptoms owners cite: Airbag 'off' light remains illuminated despite passenger in seat; Light flickers between on and off while driving; Both on and off lights illuminate simultaneously; Light remains off regardless of passenger weight (100–225 lbs); Sporadic activation only with heavier occupants (200+ lbs)
Codes mentioned: B0081
Repairs/costs cited: Owners report dealer diagnoses as passenger-side airbag internal sensor shortage or pressure-sensitive monitor failure; owner #11 had connector replacement performed but failure recurred; many owners report dealership unable to resolve issue
Recalls/TSBs owners mention: Multiple owners cite GM case numbers opened (e.g., case 9-5085721017 from narrative #6); attorney website documented in narrative #1 references at least 10 injuries and 1 death; owner #5 notes vehicle was not included in recall despite symptoms matching recalled models
Airbag Failure to Deploy in Frontal Crash
Front/driver-side airbags do not deploy during frontal or near-frontal impacts of sufficient severity, despite frame damage and conditions that would normally trigger deployment.
When: Narratives #2 (88,000 mi), #3 (severe side-impact, frame buckled), #4 (low-speed rear impact with severe front damage), #8 (64,913 mi at 50 mph impact), #10 (35,000 mi at 30 mph impact)
Symptoms owners cite: No airbag deployment during frontal impact at 30–50 mph; No deployment in severe side-impact with frame damage; No deployment in rear-impact that caused forward collision; Occupant injuries (whiplash, neck fracture, concussion, sprained back, back pain) sustained without airbag protection
Repairs/costs cited: Narratives #2 and #4 vehicles totaled; owner #3 notes other vehicle's side airbags deployed on impact but Sonic did not; no repair costs cited as vehicles were total losses
Recalls/TSBs owners mention: Narrative #2 states manufacturer was made aware and initiated investigation; narrative #3 owner expresses concern over recent GM recall for airbag deployment mechanism defect
Intermittent Airbag Warning Light Illumination
Airbag warning indicator turns on and off unpredictably while driving or stationary, occurring at various speeds and times with no clear pattern.
When: Failure mileages reported: 37,365 mi (#6), 40,500 mi (#12), 67,000 mi (#7); owner #16 notes light cycles on/off with diagnostic code present intermittently
Symptoms owners cite: Warning light illuminates and extinguishes intermittently; Occurs at all different speeds and times; No correlation to vehicle operation or external conditions; Light may be on during one trip, off during next
Codes mentioned: B0081
Repairs/costs cited: Narrative #6 diagnosed as passenger-side airbag internal sensor short, replacement needed but not performed; narrative #7 diagnosed as clock spring replacement needed, not performed; narrative #11 connector replaced but light recurred; narrative #12 dealer found 'couple of codes' but stated nothing wrong
Recalls/TSBs owners mention: Narrative #6 manufacturer case 9-5085721017; narrative #7 manufacturer case number redacted; narrative #11 manufacturer referred to local dealer; narrative #12 not a recall per Chevrolet customer service
Takata Airbag Uncertainty and Concern
Owners unable to confirm whether vehicle equipped with Takata airbags; concerned about potential defect risk and lack of transparency from manufacturer regarding airbag supplier.
When: Narrative #9 inquiry made January 2016; applies to vehicles in salt-air coastal environments
Symptoms owners cite: Manufacturer refuses to disclose airbag original equipment manufacturer (OEM); Owner concerns about corrosive damage in coastal/salt-air environments; Confusion regarding whether vehicle subject to Takata recalls
Recalls/TSBs owners mention: Chevrolet stated airbag OEM information is proprietary and unavailable, while tire OEM information is publicly available
Synthesized from 19 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.