Yes and No. If an owner has sufficient technical know-how, and equipment at his disposal, a ball joint can be replaced in a home garage. However, this may not be feasible at all times. Ball joints play a very important role in a Jeep and incorrectly installing them in the vehicle can be highly damaging. Moreover, it can always be a complicated process and can be time-consuming without the best equipment that is found in a professional shop. Anyway, buying separately and getting them fitted by a deft mechanic can be helpful.