I'm finally putting the car together again after almost two years away from it, and today I tried to find the wiring for te rear oxygen sensor.

I distinctly remember it connecting to a connector on te passenger side somewhere, close to the gearbox, however I cannot for the life of me find it!

The only suitable plugin can find is this one:



Is that the one? It doesn't sit close enough to reach the sensor.

The things that have changed are:

* New gearbox put in - does the connector actually sit on the gearbox harness?

* New sensor, so might not have the same cable length (doubtful, it was supposed to be from a new age wrx when I bought it)


Any ideas? Starting to wish I had labelled the cables up, but then I didn't think it'd take me this long to get around to fixing the car

 

That looks like it, iirc it then goes over towards the passenger side, then underneath chassis (held by a few clips) then back across to the downpipe.
Sounds like you have a sensor from a classic, which would go in the top of the downpipe.

 

Boo, well that sucks.

Luckily I have another boss in a suitable location, however not sure if a classic lambda sensor would work anyway.

Do you know if the classic/new age share the same type of connector? I was under the impression that the classics were 3 pin, vs 4 pin for new age.

 

Hmm good point that actually. I will have a look tonight and let you know.