Warning Light On problems of the 2005 Infiniti FX45

Car: 2005 Infiniti Fx45 failure: airbag system warning light blinking occurs: constantly, until cleared in the computer. Once it's cleared it is variable as to how long it will be before it starts blinking again, usually 1 - 7 days. Done to correct problem: taken to dealer for diagnostics. First diagnosed as a "front crush zone sensor". That was replaced and paid for by me, but didn't fix it. Next diagnosed as an airbag diagnostic module. Infiniti replaced that under warranty but it didn't fix the problem either. Next diagnostic was either the engine management wiring harness or the cabin airbag wiring harness. Each job is approximately $2200. 00, Infiniti refused to perform the work under warranty, and I refused to pay for one without knowing whether it would fix the problem. Infiniti has disregarded the safety of my family and washed their hands of me, told me to come pick up the car, they are no longer willing to work on it. I asked the Infiniti service technician if the airbag system would work correctly if the light is blinking and was told that it would not.