Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Description & Operation: Notes
The Supplemental Restraint System (SRS) is designed to provide increased accident protection for driver and passenger by deploying air bags in a front-end collision. The air bags, stored in the steering wheel module and in the instrument panel above the glove box, deploy in about 40 milliseconds after the impact sensors close. The SRS is designed to be used with the 3-point safety belts.
During a front-end collision, the front impact sensor(s) internal balls are thrown forward. The balls complete an electrical circuit and ignite the inflator to deploy air bag. At least 2 sensors, one safing impact sensor and one front impact sensor, must activate simultaneously to inflate air bag.
SRS includes following components: diagnostic monitor, driver-side air bag module, passenger-side air bag module, SRS readiness light (AIR BAG warning light), front impact and safing impact sensors, ignitor assemblies (in air bag modules), air bag sliding contact (clockspring) and associated wiring harnesses. See Fig 1.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.