The cost of replacing a radiator varies with the make and model of the car. A typical car radiator’s average price is $150. Labour to remove and replace around $200 again, depending on the vehicle. Then you need to add coolant and any other parts that may require replacement, such as the radiator cap, radiator hoses, thermostat etc. For research purposes, we rang four local mechanics and asked for a price to replace a radiator on a standard car. A VY Commodore 6cyl, prices varied between $330 and $420, including coolant. We then did the same thing with a BMW X5; the prices were unsurprisingly more expensive, as it is more time-consuming to remove the radiator on those cars. $575 was the cheapest and $795 the most expensive.