where are the drivers airbag sensors mounted

Do you mean "impact sensors"? Depending on the type/ area of impact, they may be in front of sides of vehicle. Best to check with DEALER , for a complete list of items to be replaced according to the type of damage and what deployed. Parts breakdown image may also give good view of locations. IF you have a good parts guy, even doing the work your self, buying OEM parts and getting some OEM information, may prove to be a huge cost saver!!