February 25, 2024
What needs to be replaced when airbags deploy?
When airbags deploy in a vehicle, several components typically need to be replaced to ensure the safety system functions properly in the event of another collision. These components may include:
- Airbag Module: The airbag itself, which deploys rapidly in a collision to cushion occupants, needs to be replaced.
- Impact Sensors: Sensors that detect a collision and trigger airbag deployment often need to be replaced after deployment.
- Clockspring: This is the coiled wire assembly that allows the steering wheel to turn while maintaining electrical connections to the vehicle’s airbag and other components. It may need replacement if damaged during airbag deployment.
- Diagnostic Module: The diagnostic module, also known as the airbag control module or ACM, records crash data and monitors the airbag system. It may need to be reset or replaced if it cannot be cleared of crash data.
- Seatbelt Pretensioners: These devices tighten seatbelts in the event of a collision and may deploy along with the airbags. They may need replacement after deployment.
- Wiring Harnesses: Wiring connecting the various components of the airbag system may need to be inspected for damage and replaced if necessary.
- Dashboard and Steering Wheel: In some cases, the dashboard and steering wheel cover may need replacement if they are damaged during airbag deployment.
It’s essential to have these components replaced by qualified technicians to ensure that the airbag system functions correctly and safely in the event of another collision. Additionally, the vehicle should undergo thorough inspection and testing to confirm that all systems are working properly before being returned to service.
What needs to happen for an airbag to deploy?
Airbags are designed to deploy in certain types of collisions to help protect occupants from injury. Several factors must align for an airbag to deploy:
- Collision Severity: Airbags typically deploy in moderate to severe collisions. The vehicle’s onboard sensors measure the deceleration or change in velocity to determine if the impact is significant enough to warrant airbag deployment.
- Sensor Detection: Modern vehicles are equipped with various sensors strategically placed throughout the vehicle, such as accelerometers, gyroscopes, and impact sensors. These sensors detect sudden changes in motion or force, indicating a collision. The sensors must detect the appropriate impact forces to trigger airbag deployment.
- Deployment Threshold: Each vehicle’s airbag system has a predetermined deployment threshold, which is the level of force or impact required to trigger deployment. This threshold is set by the vehicle manufacturer to ensure that airbags deploy when necessary but do not deploy unnecessarily in minor collisions.
- Electronic Control Module (ECM): The ECM, also known as the airbag control module or diagnostic module, receives signals from the sensors and determines if deployment criteria are met. If the ECM determines that deployment is necessary based on the severity and type of collision, it sends a signal to deploy the airbags.
- Ignition and Power Supply: The vehicle’s ignition must be on, and there must be sufficient electrical power for the airbag system to function. If the ignition is off or there is a power failure, the airbags will not deploy.
- Deployment Sequence: In most vehicles, airbags deploy in a specific sequence based on the location and severity of the impact. For example, front airbags typically deploy first, followed by side airbags if the collision warrants their deployment.
It’s important to note that not all collisions will result in airbag deployment, as the system is designed to deploy only when necessary to protect occupants. Additionally, airbags are just one component of a vehicle’s safety system, which also includes seat belts, crumple zones, and other features designed to minimize injury in a collision.
