The radiator can be replaced by a do-it-yourselfer, but it will be a long and challenging repair. If your coolant system is overheating or leaking, the radiator might need to be replaced, but we recommend checking all of the hoses and their connections as well as the reservoir just to be sure. The items you'll need may include a complete metric socket set, screwdriver, drain pan, funnel, and a pair of pliers. The process can vary depending on the vehicle. You might have to remove the splash guard as the first step, or you might find yourself working closer to the top of the vehicle. You'll want to disconnect the negative battery cable first. The process will likely require the removal of the radiator fan shroud, draining the coolant, and removing the coolant lines from the radiator. If you find any debris on the bottom, be sure to vacuum/clean it out. Once you've reinstalled the radiator, we recommend refilling your cooling system with new coolant.