The cost of replacing a radiator depends on a couple of factors. There are many different manufacturers of radiators for all of the various makes and models of cars. A typical radiator itself costs between $150.00 and $250.00. If you can do the work yourself, the cost won't be any higher. But, if you are hiring a professional to replace it, the cost can range between $400.00 and $600.00 depending on their labor rates.