O2 sensor on 05' xt - Subaru Forester Owners Forum
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post #1 of 15 (permalink) Old 02-21-2011, 07:43 PM Thread Starter
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O2 sensor on 05' xt

Hello, new Subie owner and new to the site. I recently purchased an 05' Forester Xt with 110k on the clock and want to replace the upstream oxygen sensor, or sensor(s). Need to know how many there are pre-cat (hoping one as that's all I can see) and if replacing it with a Bosch will be ok? Thanks for any help.
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post #2 of 15 (permalink) Old 02-21-2011, 07:54 PM
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I'm doing the same sensor on my '03 X and was suggested to get the OEM part from Jackie at Annapolis Subaru as the non-OEM Bosch part has a different wire connector....it also may not properly read and still cause the "check engine" lamp to illuminate.

2003 X AT
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post #3 of 15 (permalink) Old 02-21-2011, 08:10 PM Thread Starter
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Originally Posted by toysbyus View Post
I'm doing the same sensor on my '03 X and was suggested to get the OEM part from Jackie at Annapolis Subaru as the non-OEM Bosch part has a different wire connector....it also may not properly read and still cause the "check engine" lamp to illuminate.
Thanks for the info. I'll look into the OEM O2. I'm guessing $200-300 though =(
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post #4 of 15 (permalink) Old 02-21-2011, 08:14 PM
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I see this is your first forum post, so welcome to the forum from Oreogn!

You have one upstream O2 sensors & one after the CAT.

The one for our '03 X was $150+, but the ones for the later models may cost more. I'd also recommend Jackie, SubaruPartsGirl, a supporting vendor here on the forum. Her direct number at Annapolis Subaru is (866) 509-3019.

Curious... replacing the front O2 sensor due the mileages on the Forester or is there a problem?

Bobby...

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

'07 FSXT - COBB Surgeline dyno Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
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post #5 of 15 (permalink) Old 02-22-2011, 12:29 AM
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Yeah, I'd get OEM too. Just less headache in the long run.
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post #6 of 15 (permalink) Old 02-22-2011, 02:25 AM
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Go with the oem one. Its around $250 msrp, most of the online dealers are asking around 180 or so for them.

04xt/4eat, 16g, STI bits and bobs
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post #7 of 15 (permalink) Old 02-23-2011, 08:16 PM
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i have a link to a good diagram of the 2.5L's exhaust components but not enough posts to post it.

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post #8 of 15 (permalink) Old 02-24-2011, 05:06 AM
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go oem. jackie will give you a good price. just take your passenger front wheel off and open the little access panel in your fender liner and rent a 02 removal tool too. pretty easy. 30 minute job
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post #9 of 15 (permalink) Old 02-27-2011, 02:32 PM Thread Starter
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[quote=2.5x_sleeper;985249]I see this is your first forum post, so welcome to the forum from Oreogn!

You have one upstream O2 sensors & one after the CAT.

The one for our '03 X was $150+, but the ones for the later models may cost more. I'd also recommend Jackie, SubaruPartsGirl, a supporting vendor here on the forum. Her direct number at Annapolis Subaru is (866) 509-3019.

Curious... replacing the front O2 sensor due the mileages on the Forester or is there a problem?

Bobby...




Thanks for the welcome. I'll give her a call to see on the OEM part. Looks as this is the way to go.
No problem, just general maint. I was hoping to get better mpg's. I've only been avg. 18-20mpg, but maybe that's as good as I'll get. I will probably throw a K&N on there to help as well along with new plugs. If I take the access panel off in the fender wells I can get to the O2 as well as the plugs I'm hoping? Thanks! Nick in St.Louis
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post #10 of 15 (permalink) Old 02-27-2011, 02:33 PM Thread Starter
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Originally Posted by spec_bg View Post
go oem. jackie will give you a good price. just take your passenger front wheel off and open the little access panel in your fender liner and rent a 02 removal tool too. pretty easy. 30 minute job
Thanks! Can I get to the plugs that way as well?
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post #11 of 15 (permalink) Old 02-27-2011, 03:51 PM
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nah, for the plugs you just need patience and a variety of extensions and a thin wall ratchet. deep and shallow sockets. you'll see what i mean when you do them. took me a hour the first time
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post #12 of 15 (permalink) Old 02-27-2011, 04:27 PM
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Quote:
Originally Posted by 05foresterXT-Nick View Post
Thanks! Can I get to the plugs that way as well?
What plugs are you referring to?

FWIW, I just replaced my rear o2 sensor with a Bosch part off RockAuto.com (made sure to get the direct OEM fit), and it's perfect. Cost nearly $100 less than the OEM part, didn't need a special o2 sensor socket, and my CEL has permanently gone away. Nothing wrong with that IMO.

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post #13 of 15 (permalink) Old 02-27-2011, 05:04 PM
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I have have pics and info here:

http://www.scoobymods.com/front-oxyg...98.html?t=9398

If you can't see the pics you need to register but it's free. We have to have people register to keep the spam away.

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post #14 of 15 (permalink) Old 04-11-2011, 12:04 PM
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^^My error code just tripped today. As always, Peaty to the rescue. Thanks man!

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post #15 of 15 (permalink) Old Yesterday, 04:55 AM
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Not sure if cars are the same in the US as AUS but the front O2 sensor (mounted in the manifold) for my 06 XT was a Denso item, part number is 22641 AA211. Bought the genuine item from the local parts shop for $180AUD. The after CAT sensor Denso part number is 22690 AA520
Cheers
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