I see this is your first forum post, so welcome to the forum from Oregon! :biggrin:

You have two O2 sensors. Front/upstream O2 sensor (Air/Fuel) & a rear/downstream O2 sensor.

Any chance they changed "other" sensors & not just the O2 sensor?

Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]

 

Hi 2.5x_sleeper!

Thank you for the welcome and for the answer!

Here is the photo of the charge and part number. Hopefully is a mistake? I am going to call them tomorrow. This is a Subaru dealership in Alberta, Canada.

 

That does show 4 air/fuel sensors! :icon_eek:

My internet search for that part found this: Glanzmann Subaru Parts :wink:

Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]

 

Seems like rip off.

I believe most cars have 2 oxygen sensors. Even if your car is special and has 4 oxygen sensors, the chance of all 4 failing is low. And it seems like this is routine maintenance. So there is no reason to replace oxygen sensors.

 

This ^^^^^.

For a 2011 vehicle, the O2 sensors should still be working, short of a direct lightning strike. I'm surprised the dealer didn't replace the whole engine.

 

That must be a typo.

My E39 has 4 sensors, each cylinder bank gets it's own set -- 2 front, 2 rear.

Stan

 

def an issue. my 2011 xt has two. both are different part #s as well, as the sensors are different. so id imagine you wouldnt even want 2 of the same one. esp since id imagine the rear/downstream sensor is much cheaper as well. replacing both sensors on our car should cost around $200, not $1K.

 

Yes you have
http://static.opposedforces.com/epc_img/383495044002.png

http://opposedforces.com/parts/forester/us_s12/type_9/exhaust_system/exhaust/

Items 3 and 33.

Hopefully this shows you where the 2 oxygen sensors are in the exhaust system. One is an air-fuel sensor (expensive) upwind of the cat and one downwind of the cat is a narrow band sensor (cheaper)

 

Thank you everyone for the replies!

I called another Subaru dealership and they confirmed that I only have two sensors in my exhaust system as you guys were saying.

I also contacted the dealership that made the mistake and it turns out they punched in the code for the o2 sensors instead of the spark plugs....:icon_eek: . I don't know why they were so adamant the other day insisting that I had four identical o2 sensors in my XT engine.

Anyway they already gave me a refund ($1000+) :smile2: