My son had an accident in the car. Both side airbags deployed. I have replaced the airbags and the front passenger seat belt assy was locked so I had that rebuilt by Myairbags.com. I also had the SDM reprogrammed by the same company. My questions are: Do you have to replace all the side impact sensors? If so, how many of them are there? (I am assuming there are 4; one in each door) Is there a test procedure (resistance measurement) for the sensors? Any help from you guys (or girls) would be greatly appreciated.