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
Supplemental Inflatable Restraint (SIR) system is designed to supplement protection provided by driver-side and passenger-side seat belts. A frontal collision of sufficient force will deploy driver-side and passenger-side air bags. Steering wheel, steering column and knee bolsters also absorb collision energy. Sensing and Diagnostic Module (SDM) maintains a 23 Volt Loop Reserve (23 VLR) for up to 10 seconds after loss of battery voltage.
SIR system consists of Sensing and Diagnostic Module (SDM), driver-side and passenger-side air bag modules, SIR coil assembly, passenger-side air bag module disable switch, passenger-side air bag module disable switch indicator and AIR BAG warning light.
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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.