One problem related to tank assembly has been reported for the 2001 Mazda Protege 5. The most recently reported issues are listed below.
Fuel vapor odors began accumulating in the garage during an overnight park. When vapors became excessive, vehicle was parked outside. Eventually, the vapors became noticeable while idling at a traffic light. . Vehicle was taken to a car care clinic and diagnosed with a severely rusted fuel tank. I am grateful there was no fire from a spark.