One problem related to radiator has been reported for the 2012 Honda Accord. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Honda Accord based on all problems reported for the 2012 Accord.
Engine coolant, thermostat, radiator and engine failed at a mere 37k miles. Honda refused to cover. It was in motion when it started smoking and shooting out fluid from under the hood. Had it towed to two Honda dealerships only to not have it covered.