One problem related to tank assembly has been reported for the 1997 Ford Mustang. The most recently reported issues are listed below.
Suspension-sway bar - the bolt for the sway bar has sheared off. I have no idea when this occurred except that I was stopped, turned to make a u-turn and heard a loud bang. After that I began to hear this noise hitting my car I thought it was a tire or jack in the trunk. I have found it to be the sway bar. Gas leaking - when my car is ideling I start to get gas fumes filling my car, especially with the air conditioner on. I took it to Ford last summer, they charged me $300 to fix but that has not worked. My car fills up with gas fumes and now that I am using the air conditioner again, its back at my attention because the fumes are very strong and I get sick, headaches, dizzy and lightheaded.