Driver side head curtain airbags failed to properly deploy during rollover accident Not my vehicle, this is vehicle accident I responded to, Captain Fire Dept
2017 GMC Terrain airbags problems
severe 11 complaints filed with NHTSA · avg repair $1,100 · see airbags across all vehicles →
Complaints
11
Recalls
0
Avg fix
$1,100
8crashes
6injuries
What stands out
No new NHTSA airbags complaint has been filed on this vehicle in over 4 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: Multiple owners report complete airbag non-deployment in frontal collisions ranging from low-speed strikes to high-impact crashes, resulting in serious injuries including concussions and back trauma. Additionally, defective airbag sensors trigger warning lights during normal driving, and seatbelt pretensioners fire without corresponding airbag deployment—indicating systemic reliability issues with the supplemental restraint system in this model year.
Owners report a pattern of airbag failure-to-deploy across multiple collision scenarios. In frontal impacts—ranging from a 32 mph strike against a parked vehicle to high-speed collisions—airbags consistently did not deploy despite sufficient damage to total vehicles and cause serious owner injuries including concussions, brain trauma, and back injuries. Several crashes triggered crash sensors (OnStar activation, alarm sounds, warning lights), yet airbags remained undeployed. Owners detected gunpowder smell and saw smoke without visible airbag deployment.
Separately, defective airbag sensor complaints describe passenger-side and driver-side warning lights illuminating during normal driving and while parked, occurring regardless of occupancy.
A distinct failure mode involves seatbelt pretensioners firing (loud pop, belt tightening, gunpowder smell) without corresponding airbag deployment. After pretensioner activation, affected seatbelts seized—one driver-side belt would not retract, and a passenger-side belt would not extend, trapping occupants.
One owner also reported concurrent electrical anomalies (key fob failures, interior lighting malfunctions, burning smell) alongside airbag non-deployment, suggesting possible electrical system integration problems. Most owners did not obtain detailed diagnostics because vehicles were totaled, salvaged, or repairs were deemed warranty-ineligible by dealers.
Same GMC Terrain airbags reports on nearby years: 2014 · 2015 · 2018
Failure modes owners describe
Airbag non-deployment in frontal impacts
Front-end collisions of varying severity where airbags failed to deploy despite impact forces sufficient to trigger crash sensors and deploy supplemental restraint systems. Some complaints note airbag warning lights illuminated after the fact or gunpowder smell without physical deployment. Multiple collisions included significant vehicle damage, high-speed impacts, and owner injuries.
When: Multiple instances; mileage ranged from approximately 2,850 miles to 53,000 miles
Symptoms owners cite: Airbags did not deploy during frontal collisions; Airbag warning light illuminated after impact; Service airbag message displayed on dash after collision; Gunpowder smell without visible airbag deployment; Crash sensor triggered (OnStar activation, alarm sounds) but airbags remained undeployed
Repairs/costs cited: One owner reported dealer advised sensor replacement was needed but not covered under warranty; vehicle was totaled in one case; most owners did not obtain repair diagnosis before vehicle was totaled or sent to salvage
Defective passenger-side airbag sensor
Passenger-side airbag warning light illuminated continuously while driving at various speeds and while parked, regardless of whether a passenger was seated. Dealer diagnosed the failure as a defective airbag sensor requiring replacement.
When: Occurred at various driving speeds and while stationary; failure mileage not recorded
Symptoms owners cite: Passenger-side airbag warning light illuminated; Audible warning sound heard; Light illuminated whether or not passenger was seated
Repairs/costs cited: Dealer advised sensor replacement needed; replacement not covered under warranty
Driver-side airbag warning light activation
Driver-side airbag warning light illuminated with driver seated in the vehicle, indicating a potential sensor or system malfunction independent of passenger-side issues reported simultaneously by same owner.
When: Occurrence timing not specified
Symptoms owners cite: Driver-side airbag warning light activated; Occurred while driver was seated in vehicle
Airbag system electrical or component malfunction
Non-deployment events coinciding with other electrical anomalies including interior lighting failures, key fob malfunctions, and burning smell after collision, suggesting possible electrical system integration issues with the airbag system.
When: At time of frontal collision; also ongoing electrical issues reported preceding the collision
Symptoms owners cite: Airbags did not deploy during collision; Service airbag message displayed on dash; Interior lights would not turn off; Four-way hazard lights would not stay on; Burning smell present; Key fob failures preceding collision
Seatbelt pretensioner firing without airbag deployment
Seatbelt pretensioner activated (audible pop, belt tightening, gunpowder smell) in absence of full airbag deployment, with subsequent seatbelt retraction failures. Suggests potential decoupling or sequencing failure between pretensioner and airbag systems.
When: During or immediately after impact events
Symptoms owners cite: Loud pop sound; Seatbelt tightened abruptly; Smoke or gunpowder smell inside vehicle; Service airbag message displayed; Driver-side seatbelt will not retract after activation; Passenger-side seatbelt will not extend after activation; Passenger seatbelt locked during collision without airbag deployment
Repairs/costs cited: Seatbelts seized in locked or retracted position after pretensioner firing
Synthesized from 11 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Had airbags trouble with your 2017 GMC Terrain?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the airbags problem on the 2017 GMC Terrain?
It's a meaningful issue. 11 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $1,100.
At what mileage does the airbags typically fail?
Based on the 11 complaints filed, airbags issues most often appear around 36,093 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $1,100 for airbags repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to airbags?
No active recalls currently cover airbags issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2017/GMC/Terrain.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.