Where does the wideband sensor go? It's in the exhaust, not the downpipe part though right?

 

The wideband sensor is supposed to be at least 36" from the turbo. I recommend it before the flex pipe which is a little more than 36" on most aftermarket exhaust setups. After the flex pipe is fine too, just note that if it has a leak, it will throw off the reading. It should also be before the cat.
Too close to the turbo and the sensor will burn up too quickly. It's not like the narrowband o2 sensor.

 

i thought the wideband sensor went right in place of the original o2 sensor? or do you have to weld in a new spot for it?

 

Isn't the rear o2 after the cat? If so, then the wideband o2 sensor won't be as accurate since the cat may gather any unburnt fuel plus any carbon buildup. Both of which can clog, give erroneous outputs, or just cause the WB o2 sensor to prematurely die.
I know there are a lot of DSM folks that use that spot, but it's been argued not to...to include myself.
The closer to the source the better...just not too close. lol

 

that makes sense...

 

youwill almost always need to install a new bung for a widband. Unless you have an aftermarket downpipe which will sometimes have a bung already installed for a wideband

 

Well since I had the Apexi N1 catback and downpipe, I think the sensor was after the downpipe. How can I tell if that is the right sensor? Basically, I took the exhaust and DP off. I sold the DP and the exhaust has a sensor in it. I am trying to figure out if that sensor is for the wideband.

Thx

 

90% of the time the wideband will be put in the downpipe. Which im pretty sure that the N1 would have come with a bung pre-welded on it. The one on the catback is probably for the o2 sensor after the cat .