I have a 2006 1,5l impreza and i have the check engine light on.At my local subie dealership they did a diagnostic and located the problem to the front o2 sensor.I now have the new sensor and tools from ebay, and would give it a try to do the replacement myself and maybe avoid that 870$ bill (Norway)
I was pretty sure the front o2 sensor was located inside the passengers wheel well? That would be nr1 on the picture,but what is the sensor located upstream of that one??(nr 2 )They look allot alike and i want to make sure i replace the right one.
Thanks for any help.