Stephen Schultz | October 8, 2026 | Car Accidents
Airbags do not deploy in every car accident. How serious a collision must be for airbags to deploy depends on factors such as the force and direction of the impact, the type of airbag involved, and the vehicle’s safety system.
A crash can still cause serious injuries even if the airbags do not deploy. Likewise, airbag deployment does not necessarily mean that a vehicle was traveling at a high speed before the crash.
Understanding what causes an airbag to deploy can help explain why these safety systems activate in some crashes but not others.
What Causes Airbag Deployment?
Modern vehicles use sensors to detect sudden changes in speed and movement during a collision. The vehicle’s airbag system uses that information to determine whether deployment is necessary.
According to the National Highway Traffic Safety Administration (NHTSA), frontal airbags are generally designed to deploy in moderate to severe frontal or near-frontal crashes. The system makes this determination within a fraction of a second.
Several factors can affect whether airbags deploy, including:
- The force of the collision
- The direction of impact
- Where the vehicle was struck
- The type and location of the airbags
- The vehicle’s design and sensor system
Because these factors can vary from one collision to another, two crashes that look similar from the outside may not cause the same airbags to deploy.
Do Airbags Deploy at a Certain Speed?
There is no single vehicle speed that always causes an airbag to deploy. The system responds to the forces and characteristics of a crash rather than simply relying on the speedometer reading.
Moderate to severe frontal or near-frontal crashes are typically defined as crashes equivalent to striking a solid, fixed barrier at about 8 to 14 mph or higher. However, the actual deployment threshold can vary depending on the vehicle’s airbag system and the circumstances of the crash.
A vehicle traveling much faster than this may not deploy its frontal airbags if the type or direction of the impact does not call for them. For example, a side or rear collision may involve different airbags or other safety systems.
Can Airbags Deploy in a Minor Accident?
Yes, airbags can sometimes deploy in crashes that appear minor. Vehicle damage alone does not necessarily show how much force the occupants experienced during a collision.
For example, striking a rigid object can cause a rapid change in speed even when the vehicle was not traveling very fast. That sudden change may be enough for the airbag system to trigger deployment.
Airbags can also cause injuries when they inflate. Common airbag-related injuries can include burns, bruises, cuts, and injuries to the hands, arms, chest, or face.
Why Didn’t My Airbags Deploy?
Airbags that remain undeployed after a crash are not always a sign that something went wrong.
They may not deploy because:
- The impact was below the system’s deployment threshold
- The collision occurred in a direction the airbag was not designed to protect against
- The vehicle’s sensors did not detect conditions requiring deployment
- The airbag was turned off for a specific seating position
- A seat belt provided sufficient protection under the circumstances
However, an airbag can also fail to deploy because of a defect, malfunction, or damaged component. An inspection may be needed if the circumstances suggest that an airbag should have deployed but did not.
Does Airbag Deployment Mean a Car Is Totaled?
Airbag deployment does not automatically mean that a vehicle is a total loss. Insurance companies generally consider the cost of repairs, the vehicle’s value, and any applicable state rules when determining whether a car is totaled.
Replacing deployed airbags can be expensive. A crash may also damage sensors, seat belt systems, the dashboard, steering wheel, or other components that may require repair or replacement.
As a result, airbag deployment can significantly increase repair costs even when the vehicle’s other damage does not appear severe.
Are Airbags Designed to Be Used More Than Once?
Airbags are designed for a single deployment. Once an airbag has deployed, it cannot simply be folded back into place and used again.
The deployed airbag must be replaced before that part of the vehicle’s safety system can function properly in another crash. Other components, such as sensors, wiring, or seat belt pretensioners, may also need to be inspected, repaired, or replaced.
This is one reason repairs after airbag deployment can cost significantly more than fixing visible body damage alone.
Can Airbag Deployment Help Show How Serious a Crash Was?
Whether airbags deployed can provide useful information about a collision, but deployment does not prove the exact speed or force of the crash.
Vehicle data may provide additional details about what happened. Depending on the vehicle and its event data recorder, the system may contain information about speed, braking, seat belt use, airbag deployment, and other crash-related data from shortly before or during the collision.
Photos, vehicle damage, witness statements, medical records, and crash reports may also help explain the severity of an accident and the injuries it caused.
Contact the Creve Coeur Car Accident Lawyers at Schultz & Myers Personal Injury Lawyers for a Free Consultation
Airbag deployment can provide useful information about a crash, but it is only one part of understanding what happened. The severity of the impact, vehicle damage, medical evidence, witness statements, and other crash data may all be important when determining fault and evaluating an injury claim.
If you were injured in a collision, the Creve Coeur personal injury attorneys at Schultz & Myers Personal Injury Lawyers can review the circumstances of your accident, explain your legal options, and help you pursue compensation from the responsible party. Contact us today to schedule a free consultation.
We proudly serve all throughout Missouri, including St. Louis County and Boone County and we have offices in St. Louis, Ladue, Columbia, Creve Coeur.
Schultz & Myers Personal Injury Lawyers – St. Louis Office
319 N 4th Street, Suite 835, St. Louis, MO 63102
(314) 444-4444
Schultz & Myers Personal Injury Lawyers – Columbia Office
28 N 8th St # 502, Columbia, MO 65201
(573) 702-3285
Schultz & Myers Personal Injury Lawyers – Ladue Office
9807 S 40 Dr, St. Louis, MO 63124
(314) 912-3302
Schultz & Myers Personal Injury Lawyers – Creve Coeur Office
999 Executive Pkwy Dr #205, Creve Coeur, MO 63141
(314) 350-4021
