Owners of 2010 Priuses report two classes of airbag problems. The first is non-deployment during actual crashes—head-on, rear-end, and side impacts at speeds from 15 to 70 mph. Injuries include broken bones, concussions, broken sternums, and fractured ribs. In at least one case, a dealer found the sensors were misaligned by millimeters, preventing firing; in others, manufacturers stated the airbags should not have deployed based on impact analysis. The second is sensor malfunction: the passenger-seat occupant-detection system falsely displays "Airbag Off" about 50% of the time even when an adult is seated and buckled, leaving the passenger unprotected. Dealers cannot replicate these faults or pull diagnostic codes, so they remain unrepaired across multiple service visits.
Additional complaints cite intermittent SRS warning-light illumination without clear cause, wiring harness chaffing (due to seat movement) that disables the driver airbag, and the Takata recall (Campaign 16V487000) affecting curtain shield airbags, where parts were unavailable for over a year. One owner reported a curtain airbag deploying inappropriately during a minor collision, fracturing his neck. All complaints are owner allegations unverified by independent testing.
Failure modes owners describe
Airbags fail to deploy in frontal and side-impact crashes
Multiple owners report complete or partial failure of airbag deployment during significant collisions, including head-on, rear-end, and side-impact crashes at speeds of 15–70 mph. Injuries range from minor to severe (fractured bones, broken clavicle, concussion, bruised ribs, broken sternum). In several cases, manufacturers or independent inspection found no sensor faults or concluded airbags should not have deployed.
When: During crashes ranging from 15 to 70 mph; some at low mileage (3,400–9,000 miles), others at higher mileage (96,000–167,000 miles)
Symptoms owners cite: No deployment during frontal collision; No deployment during side-impact collision; Partial deployment of front airbags only; side curtain airbags fail; Passenger-side airbag fails while driver-side deploys (and vice versa); Inappropriate deployment: passenger-side airbag deploys with no passenger seated
Codes mentioned: B1826
Repairs/costs cited: One owner cited wire harness chaffing repair cost of $1,482 (labor not included). Independent inspection and dealer diagnostics sometimes unable to reproduce or identify root cause.
Passenger airbag weight-sensor malfunction and false 'off' status
Owners report the passenger-seat occupant-detection system fails intermittently or chronically. The dashboard displays 'Passenger Airbag Off' even when an adult (over 100 lbs) is seated and buckled. Occurs in approximately 50% of instances. Dealers cannot reproduce the fault or retrieve diagnostic codes, leaving the airbag effectively disabled.
When: Starting shortly after purchase (within weeks to months); some reports from October 2013 onward; one case dating back to July 2010
Symptoms owners cite: Airbag OFF indicator illuminates despite occupied, buckled passenger seat; Intermittent: fault appears and disappears randomly, ~50% of the time; Seat belt warning light illuminates incorrectly; Airbag and seat belt warning lights remain on after vehicle shut-down and restart
Repairs/costs cited: Dealers unable to repair due to inability to replicate fault or retrieve malfunction code. Multiple dealer visits (up to five reported) result in temporary fixes lasting days to weeks before recurrence. One owner offered photographic evidence but dealer refused to authorize repair without reproducible code.
Recalls/TSBs owners mention: Owners report opening cases with Toyota via dealer and direct contact; no resolution reported in narratives.
SRS warning light illumination (intermittent)
SRS (airbag) warning light illuminates intermittently on the dashboard, persisting for extended periods (entire day or longer) once activated. No accident or mechanical trigger identified; appears to be a system fault. Vehicle not in accidents; problem occurs during normal operation.
When: Starting April 2014 (one case); another starting July 2010 with mileage near 61,000
Symptoms owners cite: SRS/airbag icon warning light illuminates on dash; Light remains on for entire day when activated; Intermittent: comes and goes without pattern; No correlation to seat belt fastening or passenger occupancy
Repairs/costs cited: Dealer recommended bringing vehicle back when light displays more consistently; not diagnosed or repaired.
Takata recall parts unavailability and delayed remedy
Owners received NHTSA Campaign 16V487000 (Takata airbag recall) notifications but dealers and manufacturers were unable to provide replacement parts for extended periods (months to over a year). Multiple owners report repeated contact with dealers that resulted in no repair or parts availability confirmation. Owners express concern about safety risk during delay period.
When: Recall notifications received June 2016 through January 2017; parts unavailable through October 2018 and beyond
Symptoms owners cite: Recall notice received but parts not in stock at dealership; Repeated dealer contact yields no delivery timeline; Manufacturer confirms parts unavailable; Vehicle remains unrepaired pending part availability
Codes mentioned: 16V487000
Repairs/costs cited: Parts finally became available for some vehicles by late 2018, per one updated note. One owner was initially rejected by dealership pending a 'second letter' confirming parts availability.
Recalls/TSBs owners mention: NHTSA Campaign 16V487000 (Takata curtain shield airbag retention brackets)
Driver-side airbag wiring harness chaffing
Wire harness carrying driver-side airbag signal was chaffed due to movement of driver's seat, causing intermittent short to power. This disabled the airbag system and illuminated the warning light. Problem persisted for over six months before diagnosis. Owner notes similar issue in GM 2010 Chevrolet Impala recall, but Toyota does not recognize or cover the repair.
When: Intermittent problem for 6+ months before resolution at 150,000 miles or 10 years of ownership
Symptoms owners cite: Airbag warning light illuminated continuously; Airbags deactivated due to short in wiring; Intermittent fault
Codes mentioned: B1826
Repairs/costs cited: Repair cost $1,482 not covered by warranty (vehicle out of warranty at time of diagnosis).
Airbag sensor misalignment preventing deployment
One owner's vehicle was diagnosed by a dealer with airbag sensors positioned millimeters off, preventing proper deployment during a rear-end crash at 30–40 mph. The misalignment was discovered post-collision; the vehicle was totaled. Manufacturing or assembly defect suggested.
When: Discovered during 30–40 mph rear-end collision at unknown mileage
Symptoms owners cite: Airbags fail to deploy in collision; Post-collision diagnostic reveals sensors misaligned
Repairs/costs cited: Vehicle totaled; no repair attempted.
Curtain airbag spontaneous activation risk (recall notification only)
Owners received recall notices (NHTSA 16V487000) warning of risk of spontaneous activation of curtain airbags in roof rails with potential for passenger injury. No actual spontaneous deployments reported in narratives, but owners express concern about delay in receiving remedy parts.
When: Recall received January 2017 onward; parts unavailable through 2017–2018
Symptoms owners cite: Risk notification only; no spontaneous deployments described in narratives
Codes mentioned: 16V487000
Repairs/costs cited: Retention brackets designed to prevent inflator chambers from entering vehicle interior.
Recalls/TSBs owners mention: NHTSA Campaign 16V487000 (curtain shield airbag retention brackets)
Inappropriate or harmful airbag deployment
One owner reports side curtain airbag deployed during a minor side collision (left side, just in front of rear wheel, body/door damage only), striking owner on the side of head and breaking his neck. Another owner reports passenger-side airbag deployed when no passenger was seated.
When: During low-severity side-impact collision
Symptoms owners cite: Airbag deploys during minor damage collision; Airbag strikes occupant on side of head; Passenger airbag deploys with no passenger seated
Synthesized from 74 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.