One problem related to cooling fan has been reported for the 2009 Mazda MAZDA6. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Mazda MAZDA6 based on all problems reported for the 2009 MAZDA6.
Engine overheated while driving in a straight line in traffic at low speed with temperature in the 80's. The engine block cracked as a result. The engine and the complete cooling fan assembly had to be replaced. The engine temperature had risen high on several occasions before this, while idling, driving at low speeds, and driving at moderate and highway speeds, temperatures ranging from 50's to 90's. When the overheating occurred the air conditioning also failed to function properly. I had complained to the dealership about this issue and they claimed it was a fuse. They replaced the fuse, but it did not resolve the issue.