Wiring problems of the 2001 Toyota 4Runner

My fuse for my windows blew, then we found out that my wiring harness in the backseat had burned up. Further inspection revealed that the main wiring harness was also fried. Three different mechanics determined that the cause was a malfunction of the airbag wiring. There was no sign of wear and tear or outside influence. The airbags created the problem, are now compromised and are completely unsafe. I can no longer drive the car and even if repaired, the airbags are now compromised forever rendering the car useless. Toyota denies any responsibility. They claim that the car is too old to be their problem. This is a major safety issue that needs attention so that nobody else has the same experience or worse, is killed due to airbags deploying at will.