I have this car since 2001, and until now the only problem I have is this: if I try to drive it at night and it's cold, the car has some problems starting up, but after the first kilometer it runs smoothly.
The Citroen AX 10 TRE is a great car, for two simple facts, it's very, very economic and highly comfortable.
My advice to everyone: buy one (maybe it isn't fast, but it's great fun to drive it)
I followed your advise and bought one just to ride on the weekends for fun... and... I ended up using it 7 days a week! it's really fun to drive! who wasn't very happy with that was my wife.. "why did you spent 30000 euros on an Audi A3 to end up drivin' a 500 Euro AX???"
Well 3 years have past since I've posted that comment, and nowadays I don't drive that car anymore... : (it was great fun, but 15 years after the year of purchase it was starting to be more of a problem than a party... I own a saxo 1.1sx now just to feel that I evolved within the brand... :D it's like a new ax, but more reliable and faster ;) nevertheless I recommend everyone to buy an AX just for fun! IT'S AWESOME!