Focus ST, 13 plate.
Blowing fuses the day I picked it up. Sat in the showroom for 3 hours while they tried to sort it and finally left with the car but without the illuminated sill plate on the passenger side connected as it was that grounding to earth blowing the fuses. A week later replacement part arrived, another 5 hour wait while they fitted it.
A month later, peeling lacquer on the boot needed respraying.
About a month later, power steering failed whilst driving. Complete loss of assistance. Took a week to get it into the main dealer for diagnostics, computer said new rack needed. Took another week plus 4 days of the dealer forgetting to ring me for it to arrive and get it fitted. Car was given back to me massively pulling to the left, despite assurances it had been 4 wheel laser aligned. Took it back next day and demanded they sort it. 20 minutes and the service manager saying, "God yes that did pull a bit," I got it back with no apology or explanation, no pulling but quickly apparent no front end grip either. Took it to Grinspeed a few days later and it is measured at toeing in 6mm on the front. Setup correctly and much better.
6 weeks later, the replacement illuminated sill plate blows again. Ford refuse warranty on the proviso that it is classed as bulbs and trim.
Car promptly sold.
Now baring in mind that the ST is made in a different factory than the normal Focus, allegedly to bolster the build quality, I can't help but think what the normal one is like.