What is a SRS Light & How to Fix it?

SRS, commonly found in cars, stands for Supplemental Restraint System, including airbags. Exploring its significance in vehicle safety is our aim in this article. We’ll discuss about the history, components, and operation of SRS. We will also discuss why is it so important in today’s vehicles.

What does the SRS Light mean?

SRS, short for Supplemental Restraint System, is a crucial safety feature in modern cars, designed to safeguard passengers during collisions, often referred to as the airbag system.

Working of SSR Light in a Car?

When they are deployed, the airbags inflate with gas. This creates a shield between passengers and the car’s interior. This reduces the impact force in high-speed crashes. The SRS maximizes the protection in accidents by teaming up with seatbelts.

SRS was initially developed in the 1970s. But it became a standard in the late 1980s in vehicles. At the start it was limited to the steering wheel and dashboard. Now they are also included in side curtains and the front passenger area.

Besides airbags, the SRS incorporates crash sensors, control units, and deployment modules. These components collaborate to deploy airbags accurately, considering timing, speed, and force, ensuring effective occupant protection. Additionally, sensors detect passenger position and weight, enabling airbags to deploy in a manner that minimizes injury risk.

The SRS features different airbags:

  • Frontal for front-end collisions
  • Side for lateral impacts

Regular maintenance and timely replacement of SRS components are essential for its effectiveness. Inspect and repair the SRS promptly if the airbag warning light comes on or after a collision.

How to Fix SRS Light?

1. Determine the Issue

To fix the SRS light, you first need to pinpoint the problem. It may be due to issues like a fault in the airbag sensor, damage in the wiring, or a malfunctioning issue. Use an OBD scanner to check the error in the code.

2. Inspect the Seatbelt Tensioner

The work of a seatbelt tensioner is to tighten the seatbelt in case of a collision. If the SRS light is on, it might be a signal showing an issue in the tensioner. Make sure you check the seatbelt and the connections for damage. If the problem is still there, you must immedietly consult a professional mechanic.

3. Check the Airbag Sensors

Malfunctioning airbag sensors often trigger the SRS light. Damage from wear, corrosion, or accidents can impair these sensors. Check for physical damage and clean them if needed. If damaged, replace them to resolve the SRS light.

4. Inspect the Control Module

The SRS control module acts as the airbag system’s brain, receiving signals from sensors and deploying airbags during collisions. A malfunctioning control module triggers the SRS light. Due to its complexity, only a certified mechanic should repair or replace it.

5. Inspect the Wiring

Faulty wiring is another common trigger for the SRS light. Inspect the wiring harness for damage or looseness. Repair corroded or loose connections, but replace damaged wiring. Proper knowledge and tools are necessary for addressing wiring issues.

6. Clear the SRS Light

After addressing the root cause of the SRS light, it’s essential to reset the system. This action deactivates the SRS light, confirming proper system function. Consult the vehicle’s manual for specific steps on resetting the SRS light.


1. What’s SRS in a Car?

SRS stands for Supplemental Restraint System, a safety feature (commonly known as the airbag system) designed to protect passengers during collisions.

2. How Does SRS Work?

SRS uses sensors to detect crashes, triggering airbag deployment to cushion passengers from impact.

3. What’s Included in SRS?

Airbags, sensors, control units, and deployment modules work together to deploy airbags effectively.

4. When Did Airbags Become Standard?

Airbags became standard in the late 1980s, following their introduction in the 1970s.

5. What Types of Airbags Are in SRS?

Frontal, side, and side curtain airbags serve different crash scenarios.

6. Why Is SRS Maintenance Important?

Regular maintenance ensures SRS functions effectively in emergencies.

7. How to Fix an SRS Light?

Use an OBD scanner, inspect seatbelt tensioner, check airbag sensors and control module, examine wiring, then reset the SRS light.

8. What Causes the SRS Light to Turn On?

Common causes include faulty sensors, wiring, control module, and seatbelt tensioner.

9. How Has SRS Evolved?

From basic airbag systems to advanced, multi-airbag setups with sophisticated sensors and integrated safety features.

10. Why Understand SRS for Road Safety?

Understanding SRS helps drivers maintain vehicles, make informed decisions, and reduce risks on the road.


In summary, SRS, or Supplemental Restraint System, is a vital safety feature in cars, safeguarding occupants during collisions by deploying airbags, seatbelts, and sensors. Regular maintenance is crucial for vehicle safety. Technological advancements improve SRS effectiveness, minimizing injuries. Prioritizing road safety entails understanding car safety systems like SRS, empowering informed decisions to reduce risks.

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