Everything.
Catalytic converter packed in
fault with oil tank
fault with engine cooler
fault with tyres
emergency tyre inflater blew up in face while trying to use.
The picanto was the worst purchase in my entire life I've had nothing, but problems with it since I bought it in the past 2 years I have spent nearly 2000 pounds on repairs and a crazy amount of money on petrol I'm having to fill up 10 pounds every day I've have been to kia they say there is nothing wrong with the car I have been to other garages and the find something faulty everytime I am highly disappointed about this car and I warn people to steer clear.
Faulty "oil tank", "tyres" and the tyre inflator blew up in your face? What is an oil tank - do you mean the sump? Also, as far as I was aware, Picantos came with main-stream branded tyres so please explain what the fault was with those. Sounds like another silly fictional review - probably from some 17 year old hacked off because mummy didn't buy the C2 VTS he wanted and he's now embarassed having to use a Picanto!