One problem related to radiator has been reported for the 2008 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mazda MAZDA3 based on all problems reported for the 2008 MAZDA3.
July 11, 2011. 34443 miles. Constant running of electric radiator fan when vehicle is running caused by complete failure of oem water pump. Unit replaced by another oem water pump. November 01, 2017. 97841 miles. Complete failure of second oem water pump. Unit replaced by a third oem water pump.