Two problems related to cooling fan have been reported for the 2002 Mazda MAZDA6. The most recently reported issues are listed below.
The 2002 mpv has had recurring problems with the fan control module. Their has been a recall on this item, but after having had the fan control module repaired under warranty the same problem resurfaced after only 24,000 miles -- and this time was not covered under warranty. The repair cost $233. 35.
I 've had to replace the water overflow bottle (sub tank) three times. Each time there was a pin hold in them, which allows the car to run hot and shut down. I truly believe there is a defect with those bottles. I own a 2002 Mazda 626. I had to purchase the bottles each time. They request that you give up old for the new.