Nothing serious - Handbrake cable changed, clutch, power steering belt.
I've always treated the car well with regular services and respect for it when cold and prior to turning off when the turbo needs to run down, and it was rewarded me with no problems, no smoke, good oil consumption etc. Look after it and it'll look after you.
There have been some minor faults which I quickly came to ignore - the indicators don't self-cancel, and the intermittent wipe can be, well, intermittent! But it's all part of the Italian car fun.
Probably the best looking car made in the 1990s, and stunningly quick. It's the only car I've owned where after a few months the power hasn't seemed "normal".
Very few things on the road are quicker, Boxters, 330is, Audi TTs etc are easily embarrassed by a standard spec coupe.
The handling is also very good for a FWD car with lots of steering feel, quick responses and surprisingly little torque steer thanks to the clever "viscodrive" front diff.
The seats are comfy and ride hard, but not as harsh as might be expected. I've also found the air conditioning to be very good.
It's far more fun than other cars I've owned, including a BMW 325i and Audi quattro.
I'd happily have another one.
Whilst it has been reliable, the fiat coupe forum has been an invaluable source of knowledge and removed so called 'coupe paranoia syndrome' where owners worry about phantom faults.
The reliable ones are the un-modified ones, and my advice would be to keep in standard and as Fiat/Pininfarina intended.