Everything You Should Know About SRS Airbags: Function and Troubleshooting Tips

When it comes to vehicle safety, one of the most crucial features is the Supplemental Restraint System (SRS), more commonly known as the airbag system. These airbags are designed to work alongside seatbelts, offering an additional layer of protection in the event of a collision. Let’s take a closer look at what SRS airbags are, how they work, and some useful maintenance tips for vehicle owners and repair professionals.

What Are SRS Airbags?

SRS airbags are safety devices installed in vehicles to protect the driver and passengers during a crash. Unlike traditional seatbelts, airbags are designed to rapidly inflate during a collision to cushion the impact of the occupants' bodies, reducing the likelihood of serious injury. These airbags are "supplementary" because they work in conjunction with seatbelts, not as a replacement.

The SRS system includes several components, such as sensors, inflators, and airbags that are strategically placed throughout the vehicle. The most common airbags are located in the steering wheel for the driver, in the dashboard for the front passenger, and side-impact airbags that deploy from the door or seat areas.

How SRS Airbags Work

SRS airbags rely on a sensor system to know when and how to deploy. Crash sensors located throughout the car detect sudden stops and decelerations.

Sensors in the car’s interior provide other vital information, such as which seats have occupants and how much the occupants weigh.

All the information gathered by the sensors runs through an algorithm that determines whether airbag deployment is necessary and how much force should be used.

This complex system allows the SRS Airbag system to protect occupants of any size without injuring smaller passengers.

Here’s a simplified step-by-step breakdown of how the system functions:

1.     When a vehicle experiences a sudden deceleration, such as in the case of a crash, sensors in the vehicle detect the impact.

2.     These sensors send a signal to the airbag control unit, which activates the inflators.

3.     The inflators then rapidly release gas into the airbags, causing them to inflate and expand, often within a fraction of a second.

4.     The airbags then deflate quickly to allow the occupants to move and exit the vehicle.

Common Issues with SRS Airbags

Although airbag systems are essential for safety, they can encounter problems over time. Here are some common issues to watch out for:

1.     SRS Warning Light: If the SRS warning light on the dashboard comes on, it indicates that there’s a problem with the airbag system. It’s essential to have the system checked immediately to ensure that the airbags will work well in the event of an accident.

2.     Airbag Deployment Failure: Due to issues with the system, airbags may not deploy during an accident This could be caused by malfunctioning sensors, a defective airbag module, or damage to the airbag itself.

3.     Accidental Deployment: Often due to electrical issues or faulty sensors. If this occurs, it's essential to have the system inspected and repaired.

How to Maintain and Troubleshoot SRS Airbags

1.     Regular Inspection: Have your vehicle’s airbag system inspected regularly, especially if you’re involved in a minor accident where the airbags didn’t deploy. Even if there’s no visible damage, the system should be checked for any hidden issues.

2.     Avoid Modifying the Airbag System: Never attempt to modify, remove, or tamper with your vehicle’s airbag system. Even small changes can affect the airbag’s performance.

3.     SRS Warning Light: If the SRS warning light illuminates on your dashboard, don't ignore it. Consult a mechanic immediately to diagnose and resolve the issue.

4.     Proper Repair: If the airbag system has been deployed, it’s crucial to replace the airbags and reset the system to ensure that the car is once again safe for driving. This process should always be carried out by a trained professional.

FAQ:

1. Are SRS Airbags the Same As Regular Airbags?

SRS airbags refer to the same components as “regular airbags.” Some people may say “regular airbags” to refer to the front airbags located in the steering wheel and the passenger side of the dashboard. A frontal airbag is one of four airbag types used in the SRS.

2. How Often Should SRS Airbags Be Replaced?

Most SRS airbags are designed to last as long as the vehicle itself. Others may need to be replaced every 10 to 15 years. You should see what your vehicle manufacturer recommends to decide when to replace your SRS airbags. Always replace your SRS airbags if they deploy.

Airbag Safety Tips

• Always wear your seatbelt as it ensures that the airbag can perform effectively by keeping you in the correct position during a crash.
• Adjust your seating position so there is at least 10 inches of distance between your breastbone and the steering wheel or dashboard.
• Children 12 years old and under should always ride in the back seat, properly restrained, to protect them from potential injury from a front airbag.

SRS Airbags Scanners Recommendation 

Autel AL619 OBD2 Scanner

ABS & SRS Airbag Car Diagnostic Scan Tool

Conclusion

SRS airbags are a critical component of modern vehicle safety systems, offering life-saving protection in the event of a crash. By understanding how airbags work, recognizing potential issues, and maintaining the system properly, you can ensure that your vehicle remains as safe as possible.