Yes, airbag deployment can absolutely cause a car not to start. This isn't a direct result of the airbags themselves, but a safety feature built into the vehicle's SRS (Supplemental Restraint System). When a significant impact triggers the airbags, the car's computer often initiates a crash data reset or safety lockdown. This is designed to prevent potential electrical shorts or fuel pump operation that could cause a fire after a collision. Essentially, the car is put into a protective state until a professional can assess and reset the system.
The primary culprit is usually a blown SRS fuse or a triggered impact sensor that needs resetting. Modern vehicles are a network of interconnected computers. The ECU (Engine Control Unit), which manages the engine, may receive a signal from the SRS control module that a crash has occurred. As a safety protocol, the ECU can disable the fuel pump or ignition system. Simply replacing the deployed airbags won't solve the problem; the SRS module itself often needs to be professionally reset or replaced, and all related fault codes must be cleared.
Here's a breakdown of common components affected and typical actions required:
| Component/System Affected | Typical Symptom | Required Action | Approximate Cost Range (Parts & Labor) |
|---|
| SRS Fuse | No power, no crank | Locate and replace the specific SRS fuse in the fuse box. | $10 - $50 |
| Fuel Pump Cut-Off Switch | Engine cranks but won't start | Manually reset the switch (often located in trunk or footwell). | $0 - $100 (if switch replacement needed) |
| SRS Control Module | No start, airbag warning light on | Professional diagnostic scan, module reset or replacement. | $500 - $2,000+ |
| Wiring Harness Damage | Intermittent or no power | Inspection and repair of damaged wiring from the impact. | $200 - $1,000+ |
| ECU Safety Lockout | No communication with diagnostic tool | Professional scanning and ECU reset/reprogramming at a dealer. | $150 - $500+ |
Attempting to fix this yourself without proper training is not recommended due to the risk of accidental airbag deployment. The safest course of action is always to have the vehicle towed to a qualified mechanic or dealership for a full diagnostic scan. They can pinpoint the exact cause—whether it's a simple reset or a more complex module replacement—and get you back on the road safely.
