It can be hard to replace a driveshaft, but it depends on the car. Some cars have the driveshaft located in an accessible spot while others don't. It also depends on how much work you're willing to do yourself. If you're not mechanically inclined, then it might be best to take the car to a mechanic. However, if you're comfortable working on cars, then you might be able to do it yourself. You just need to purchase the correct parts and follow the proper installation instructions.