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Old 02-21-2011, 06:43 PM   #1 (permalink)
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Default 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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Old 02-21-2011, 06:54 PM   #2 (permalink)
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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.
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Old 02-21-2011, 07:10 PM   #3 (permalink)
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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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Old 02-21-2011, 07:14 PM   #4 (permalink)
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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?

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Old 02-21-2011, 11:29 PM   #5 (permalink)
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Yeah, I'd get OEM too. Just less headache in the long run.
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Old 02-22-2011, 01:25 AM   #6 (permalink)
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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.
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Old 02-23-2011, 07:16 PM   #7 (permalink)
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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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Old 02-24-2011, 04:06 AM   #8 (permalink)
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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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Old 02-27-2011, 01:32 PM   #9 (permalink)
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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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Old 02-27-2011, 01:33 PM   #10 (permalink)
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Quote:
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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Old 02-27-2011, 02:51 PM   #11 (permalink)
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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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Old 02-27-2011, 03:27 PM   #12 (permalink)
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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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Old 02-27-2011, 04:04 PM   #13 (permalink)
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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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Old 04-11-2011, 11:04 AM   #14 (permalink)
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^^My error code just tripped today. As always, Peaty to the rescue. Thanks man!
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