Follow the exhaust manifold to the other side of the cat and you will find it. FYI, the upper ones go bad more frequently.I know where the upper one is that you can see when you pop the hood. I know there's one underneath somewhere, but have no clue where it is.
This car has always been a little confusing for me. On my Rav4 I can find everything easily, and there are diagrams and pictures everywhere online. The MK3 it's like everyone who ever bought one hates it so much they don't post anything about anything on the car online.As thats the upstream one...
It's easier to jack the passenger wheel, remove the tiny shield from below. You have straight access to the horn then.Like the horn. I looked on how to replace the horn and all the instructions and videos were about taking the front fender off. I actually got stuck doing that because of two bolts on either side that are recessed in such a way that I couldn't figure out how to get them off. Then I figured out an easier way and posted a video on it.
Did you actually just say it's easier to jack up the passenger side, take the wheel off, take the shield off, and get to the horn over my video showing that you take a knife or screwdriver and pop the plastic cover off the front fender and can directly access the horn?It's easier to jack the passenger wheel, remove the tiny shield from below. You have straight access to the horn then.
View from the bottom: https://www.focusfanatics.com/forum/10458818-post86.html
That is the exhaust manifold. By my foot in the picture is the downstream sensor and the hole is where the upstream would be.Pretend for a minute that everything I know about cars is from Youtube or what someone showed me in person and that I have no idea what I'm looking at in the picture.
It wasn't hard but still a pain. 2 people make it much easier. Have to remove both engine mounts (didn't have to touch the trans mount) drop the engine a couple inches and pull it forward a little. Then with a bit of wiggling come out the top pretty easy with one person on each end.Hey just wanted to ask how easy it to remove the factory header from the focus?
So this is what, th condescending blog for people who already know how to do everything to pat each other on the back? You go on blogs to learn.If thats the case, Why not have a shop do it?
Get the car up on a rack or get the frontend up on jackstands & get underneath it & follow the exhaust manifold/converter back to the flex. You'll find the upstream before the convertor & the downstream after......The o2 sensors read the exhaust content, whether rich/lean, ect. I'm not here to pat ppl on the back as you mentioned. Just basic common sense/logic or you could be that guy that goes into a auto parts store & says I need such & such part for that car over there in the parking lot & has no clue what he's driving, some ppl I find its best to have a shop do it & for others to have buddies, ect help them or show how. Your always going to find some parts on different vehicles takes time to do & then think, what were the engineers thinking, such as a starter on a Northstar or a Lexus LS or a water pump on a 3.5 Ford in a flex/taurus/fusion. Look at the so called lifetime filter on the earlier foci's, I find its easier to remove the front bumper cover off to remove it & all the ducting.I know where the upper one is that you can see when you pop the hood. I know there's one underneath somewhere, but have no clue where it is.