Hi Linda, disconnect the negative terminal of the battery, (radio security code!) wait 10~15 mins then from the rear of the steering wheel there will be normally four allen or torx screws that attach the airbag to the sterring wheel, with these removed the airbag can be pulled rearwards there will be one or two wires that have to be disconnected then the bag assembly will come away to reveal the centre nut that holds the wheel onto the column
nigel
January 2009