In my experience, the cost to fix a car radiator can vary quite a bit, depending on the extent of the damage and where you live. For a minor repair, you might be looking at something between $50 to $200. However, if you need a complete radiator replacement, the cost can shoot up to anywhere from $300 to $800, including both parts and labor. Bear in mind, this is a rough estimate and actual costs can be higher or lower. Always remember to consider the value of your vehicle before committing to expensive repairs.