Automatic transmission had to be completely rebuilt. Drive train connecting engine with transmission was poorly constructed. Upon rebuild, transmission worked, but roughly.
Entire engine cooling system was poorly constructed. Pressurized purge tank for coolant leaked often, requiring replacement. Cooling system often ran out of coolant without warning. Coolant warning lights on dash did not work properly. Lower and upper radiator hoses both failed at different times, standing the vehicle un-driveable. Various other cooling system parts failed, at tremendous cost.
Leather seats, although taken well care of, tore easily.
Fog lamps were poorly placed in the front, and were very easily shattered by rocks, and not cheaply replaced.
Anti-lock brake system is a first generation system, and behaves very unlike modern systems, and is very dangerous to use.
Engine fan clutch locked up.
Battery failed often, and was located in the back of the engine bay, making it difficult to service or remove.
Switched failed easily.
Tape player ate tapes from the beginning.
Custom security key was impossible to have copied.
Bodywork became severely rusted.
Starter motor had to be replaced.
Air conditioning never worked properly.
Car did not come with key to glove box lock.
Temperature gauge never worked properly, and did not warn that the engine was overheating (twice).
Paint and clear coat chipped from the beginning.
No air bags.
This car was good in its day (1988-1989), but the car's day is long gone.
Very expensive to keep up.
Most Ford dealerships no longer carry the replacement parts. Most mechanics have no knowledge whatsoever of these vehicles.
I was never able to get the car up the the advertised top speed (140 MPH).
Poor transmission made acceleration very slow.
The car was rather roomy, and had a large trunk compartment.
When running properly, the car was comfortable on the road.
It's hard to tell people about your car when almost nobody has ever heard of it.