Replacing the phone switch on a multifuction wheel

If you are saying that you need to replace the buttons on the steering wheel on the vehicle that activate the phone, you should know that it might not be the switch. IT could be the wires to the switch panel. At any rate, this is not something that is easy to do because of the air bag. You need to unhook the battery from both terminals and you should then tape the cables together so that they are shorted out. This discharges the capacitor that fires the airbag. Then you need to locate the screws or bolts that come through the back of the steering wheel and hold it together. Take those out and the steering wheel comes apart. Then you need to go to the dealer to get the part.