Do Ford Focus' have a security code for the stereo and a separate code for the head unit?

Focus Titanium touch screen satnav/stereo 2007 - cd/radio stopped working (satnav was still functioning) so I sent it off to be repaired. It was returned 'unrepairable'. When i went to switch it on, my code didn't work. I've owned the car since 1 year old and have always used the same code. I have the original code card with the serial number (V016303) listed. The garage said its cos Fords have 2 codes; one for the stereo and one for the head unit… So i need to find out the head unit code… But I can't verify this anywhere on the net. The unit that is now in my car, which they swear is mine, has a serial number V013590 listed on it.

Why does my Ford Focus shake when maintaining 70 mph?

I've got a 2007 Ford Focus hatchback. My husband did an oil change on it about month ago. Since then there's a vibration. Everything feels fine until you go 70 mph. While trying to maintain the speed the whole car shakes. It feels like it is about to stall, but doesn't or at least, hasn't yet. The shaking stops when accelerating or decelerating. Its an automatic and the engine light pops on and off. It only happens while trying to maintain speed in the 69-71mph range.

Is this a good deal should I look elsewhere?

Went to a place called park auto mall they have a 2012 ford focus sel very nice looking clean and runs good they want 17.5 for it with 44k miles and qouted me at 313 a month it seemed good to me but I found focus titanium's with way less miles on them for cheaper so what should I do I really want the 10speaker system and a backup cam

A stalled motor/limp mode on my '08 Ford Focus (pre-facelift) 2.0 S. Help, anybody?

I have a 2008 pre-facelift Focus 2.0 Duratec HE.

It has been 3 times, I suffered a stall/limp mode on my focus, after driving in traffic jam (not in the traffic jam, the symptoms always came AFTER I've manage to brake loose from the traffic jam. The car works fine in the middle of the traffic). Oh, and NO CHECK ENGINE

And everytime I've check to the shop, the error code was always been the same, something about HO2 and AFR being too lean. My first tought was the hose from air box to the throttle body was loose (it was kinda loose) and the shop already fix this problem & reset the code from my car.
But it happened again. Same symptoms, limp/stall engine, rough idle, etc. But no solution at all…

The car was in such healthy condition, new oil, never late on service, tuned up, clean air filter, new oil filter, I even just bought new tires for it… Everything, except the error, was in great shape.

I was suspicious with the O2 sensors in my car, since I didn't get any decent fuel consumption, regardless what kinda gasoline that I put in, and what driving mode/style I used. I even try to use the tiptronic mode, to shift so I can ideal fuel efficiency. Nothing worked.
It's true right, when you have faulty O2 sensors, you got all the symptoms that I've mentioned above, PLUS bad gas millage?

Please, help me
This is my first Ford, and I love this car so much. I just want information about this problem, before I go back and forth to the shop again

Ford Focus RS Mk2 running and maintenance costs?

All I've wanted since being a teenager is a Ford Focus RS Mk2 in White! Not I'm 23 I'm looking to get rid of my current car as soon as I get full time work. I have the money for the car and insurance is roughly around £800 which is afforable.

However for all those who own one of these beautys what are the estimated running costs in terms of, cost of a full tank of petrol, mpg, how many miles you get to a full tank? My current car only does about 220 miles on a full tank at £47. (It is 15 years old) I will mainly be doing town driving with abit of traffic

Also how much is maintenance a year on estimate? I've read things about 1st year service, 2nd year service, and 3rd year service. Where the prices increase each year? Can I not just pay a normal service fee at a Ford dealership or get it serviced anywhere else (if I wanted) like you do any other car? Why is there all these special prices.

Also any other advice about owning one that you have would be helpful.