Something caused the last radiator to blow and will end up with the same result if not fixed. The most common is simple lack of cooling system maintenance. If you have a leak and let it go you end up with air pockets in the lines and overheats car for sure. Fix any leaks no matter how small they seem. Let idle and see if fans kick on by themselves, if starts to overheat and fans not coming on then the relay controlled by the ECM is bad. Replace. The fan can be bad but most imports have two and obviously both wouldn't fail at the same time. To rid of air, while car is cool, remove cap and helps to park slightly aimed uphill, run with the cap on but loose or the way I like to do is use a funnel that's perfectly into the cap opening and run. Once all air is out the coolant rises. Let cool, remove funnel, fill if needed, cap on. Drive a bit, let cool, check level again and add if needed. Of course make sure reservoir is to fill line. The reason I don't mention water pump or thermostat is because if either failed the hot coolant wouldn't travel through the radiator to begin with.
Did you replace the thermostat? If not replace it and then have a pressure test run on the cooling system. Also make sure the fan is coming on when it should. If you are loosing coolant with no apparent leak and see white smoke out the exhaust then suspect a blown head gasket.
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