Coolant tank needs replacement??huh
 

After hearing about coolant leaks on the 7 I'm getting worried...was this a recall or just a weak point on the car.

What can I do to never have this happen to me?

replace your stock plastic AST w/a metal Pettit or N-tech one. They're around $100. After that, you shouldn't have any problems. Also, check your coolant level periodically at the radiator fill neck (when the rex is cold of course) to be safe.