Front Air Bag Sensor Control problems of the 2003 Lexus ES300

2003 ES 300 - air bag sensor issues: this issue is ongoing as of Nov 2011 and started back in 2005. Why doesn't Lexus offer a way for consumers to fix error codes on their own vehicles? I know what my error codes is - b1186 - though, Lexus wouldn't tell me this. I had to find out by doing my own diagnostic testing. Depending on who I spoke with, they told me different things from needing a driver sensor replaced, to the passenger sensor, to the center sensor, to the driver airbag, to needing all of it replaced. Each person I spoke with was extremely reluctant to provide me with any information about the problem and said that I needed to bring the vehicle back for them to fix. The first time I took it in, they said it would cost about $700 (2008). Last month, they said it could be anywhere from $1500-$3500. I have done my share of research, reading all I can online, including consumer forums. I have read 100s of complaints about airbags - sensor issues, lack of deployment, check light on, etc. . It appears that Lexus has had issues with airbags for years. Yet, there has not been any recalls or even class action lawsuits. I can't sell it with the light on and its not worth putting that much money into it. But, Lexus won't offer me another solution except to fork over all my savings.