I usually deal with interior and accessory issues and exterior cosmetics. I don't do the mechanic mechanic work. Focus' as far as accessories and interior stuff they are pretty sound. The only issues that seem to be a bother are the power windows and sometimes a speaker or radio issue. Every once in a while, a power mirror. Nothing I've noticed to be notorious problems. I have repaired a lot of broken side mirrors on them. Structural damage. Don't know if its from abuse or what, but my guess is abuse. Can't say for sure though. However, on cobalts, and new style 05+ malibus, I am constantly replacing speakers, broken cd players, broken trim pieces, and dash vents. Upper level cobalts have painted trim around the power window switches and door handle pockets. That doesn't last 2 years! Flakes and scratches off. I have to take laquer thinner and remove the paint, then dye then a suitable color to match the interior on every single LT trim cobalt. If you so much as spill tap water on a cobalt seat its an INSTANT stain. Terrible material. Same with malibus. Impalas seats are good. IMO, focus', and taurus' are far superior in quality in the interior and accessories. GM vehicles have far better power plants. Ford's are dogs! I rarely get fusions, so I can't say for those. Sorry I can go on an on. lol. Impalas are about the best Chevy car in the quality department. All the interior is designed different in them. Pontiacs.......grand ams, grand prixs, vibes, and G6s. Same issues as cobalts and malibus. Never touched a G8. I assume they are like the impala and are designed with a completely different platform.
when I was testing a Focus' power locks, I thought I noticed one of the locks not working. So I just kept locking and unlocking it really fast. after about 10 seconds of that, the car gets pi$$ed off and kills the power locks for about a minute or so, LOL! Just one of those abuse preventers that ford does.