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Old 01-31-2016, 04:07 PM   #1
Scooby Newbie
Member#: 315079
Join Date: Mar 2012
Chapter/Region: NWIC
Location: Seattle
2011 Impreza Outback
Silver Bullet

Default 2001 legacy gt - oxygen (o2) sensor replacement

Hey All,

Has anyone replaced the o2 sensor in a 2001 legacy GT? Its my first time and I'm not sure I can determine which cable is the o2 sensor with certainty. I've spent probably over an hour googling for answers and walk throughs but haven't found a walk though for this specific model. And the youtube videos seem to mention taking the passenger side wheel off. Then others mention going from underneath. I've got 4 jacks but just want to know if I should be behind the passenger tire or underneath?

Also does anyone happen to have a pic that shows which cable is the front o2 sensor?

Much thanks!
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Old 01-31-2016, 05:05 PM   #2
Scooby Newbie
Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Oly
98 My FMIC
Is bigger than yours.


It'll be the one in front of the cat. Most likely it's going to be right down by the inboard CV joint on the passenger's side front axle.
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Old 02-02-2016, 11:27 PM   #3
Buck Rogers
Scooby Newbie
Member#: 139234
Join Date: Jan 2007
Chapter/Region: NESIC
Location: Vassalboro, ME
05NA Lifted Baja MT
Brilliant Silver


There's a little more working room if you do remove the passenger side tire. It's bound to be crusty, and the extra room will come in handy. The 02 sensor in my 05 Baja with 170k, came out with minimal grief. If you're in a cold environment, a heat gun on low makes the electrical I connections easier to separate as well.

Good Luck
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Old 02-04-2016, 12:14 AM   #4
Scooby Guru
Member#: 115154
Join Date: May 2006
Chapter/Region: MWSOC
Location: NYC
2005 Outback XT
White on grey


I would just run the car for a few minutes to get the o2 sensor hot so it's easier to remove. heat gun will not touch it, torch is likely necessary if you live in the snow belt.

Also I would suggest renting/buying an O2 sensor wrench, it'll give you the ability to get a good breaker bar on the sensor and not round the nut.
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Old 07-18-2016, 08:30 PM   #5
Scooby Specialist
Member#: 148078
Join Date: May 2007
Chapter/Region: NWIC
Location: Kent, WA
2001 Legacy GT
Birch White


Good luck. On my 2001 GT I tried to get to it without any luck on my own. After working on it past 1 am in the morning I gave up and paid a mechanic $120 for 20 minutes of labor. I even had an o2 sensor socket!

I took the wheel off and tired to reach it on my own from underneath or from above and could not get the leverage I needed to even budge the guy.

Good luck!
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