I'm confused, please help.

I need to change the front O2 sensor on Hawkeye Impreza, but I have found 2 possible ? Sensors.

One is behind the radiator, low down and has a green sleeve on it.

The other is near the front drivers wheel and has a white and either black or blue lines on its sleeving.

Which is which?
Thanks

 

O2 sensor will be in the actual exhaust pipe. Just trace where the exhaust runs from the back of the turbo.

 

Front O2 sensor (A/F sensor) is in the exhaust manifold just before the up-pipe and is accessed through the flap in the offside (RH) wheel arch.

http://www.clubwrx.net/forums/mainte...or-02-wrx.html

 

Thanks for the help.

 

^ the one with the blue wire you found
Trace it back / it should plug in to the harness on the drivers side next to the suspension turret

Regards