Water Leakage
These 2005 - 2009 Mustangs have a known water leak issue. Ford put out a service bulletin on the problem. Should this occur, the electrical system can get messed up. Almost impossible to find someone (even a dealership) to replace these electrical parts. Even if you do it will cost $1000s. Car will run fine but hard to drive with no windows, horn, lights, or who knows what