ESAT Inc has the ability to clear and reset crash data in most VW, Audi, Porsche Cayenne, Mercedes and Volvo airbag controllers. The process begins with fault analysis with simulated airbags and sensors with reprogramming of the MCU. There are also ocassions where the 65535 error is generated and in most cases can be cleared for reuse.
Read these links and see if your controller is listed. If not, contact ESAT Inc with your controller version, year and make.