It will not effect anything else. If they are not covering it under warranty then take it somewhere else. The diagnosis fee at the dealer is high. Chances are that it is just a bad impact sensor. They can be had on Amazon for $56. The dealer will charge $200 just for the part. For the $100 diagnosis fee from the dealer you would be better off ordering 2 sensors online and replacing them both now. You would spend $12 more than your diagnosis fee, but it will be fixed