The contact owns a 1995 Toyota T100. The contact stated that while driving at approximately 45-50 MPH, the driver's side air bag unexpectedly deployed. The air bag warning light had illuminated intermittently. The contact stated that there was no impact to the vehicle that could have caused the air bag to deploy. The contact sustained bruising to the left arm, chest, and stomach, but medical attention was not received. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 65,000.