the Mustangs do have a lot of problems,,,but the main thing when buying a used one is to be sure the motor is in good shape,,,most of the time the biggst problems with used mustangs is that they have been hot rodded around so much the motor is worn out....
In june of this year a young woman brought a 2005 mustang to our shop she had purchased in January 2009,,so she could tag and drive it after her graduation..
She wanted the oil changed and 4 new tires put on.....
When we change oil we use a 3 gallon catch pan for the oil,then we check it and dump it into the storage barrel.
When we removed the oil plug we noticed it had a magnet on it,,which is used to collect metal particles and keep them from damaging the engine,,,after the oil drained ((which was very black))we removed the pan and the oil looked like a marble cake mix with streaks of silver and gold flowing all through it..
We showed it to the woman and her father they both asked what it was,they were upset to hear that the silver colors were from the CAM bearings,and the gold colors were from the brass bearings of the Crank shaft....
They however were not convinced I was telling them truth,so they got the oil changed and tires done and said they would take the car to the dealership...they came back the following week and asked if we could just change the Cam and Main bearings... becuase the dealership wanted $3500 and if they didnt get new rings,rods,pistons,cam shaft and have the crank shaft serviced they would not garuntee that the new bearings on the cam/crank would fix the problem...
They ended up getting a used motor from a slavage yard that was in much better shape for $2800 with labor they still paid $3400 for the whole deal,on top of the $12k they paid for the car...
so beware of the nice looking mustangs,,most of them have been run into the ground even with low miles..