05 legacy gt o2 sensor Jump to content. It was throwing an o2 sensor code Hey folks, I have a 04 JDM GT-B. Put car on lift to find rear o2 sensor was frayed and further inspection up the line was melted. So if the rear o2 sensor isn't working properly, it can incorrectly throw a p0420. 5 GT Ltd 5EAT Wagon with 125,000 miles and no mods. 5iHelp. A faulty O2 sensor can certainly cause shaking or vibrations in Subaru Legacy when driving. Having an O2 sensor socket will help a lot, but otherwise you need a 7/8 wrench. Replaced upstream O2 and found one small vacuum hise hose, which I out back in and zip tied. Does anyone know which o2 The car hesitates and bucks between 2-3k. This car is new to my paddock as well. I How many o2 sensors are there on a 95 Legacy Wagon L and where are they located at. 5i The FSM doesn't mention the o2 sensor being a possible culprit for p0171, and after doing a little searching here the solutions have been fixing intake leaks or finding disconnected Car: 2005 Subaru Legacy GT Limited fyi all 05 + legacy's have built in code reader. I have an accessport and if i resent the ecu the problem seems to go away but Fourth Generation Legacy (2005 - 2009) O2 sensor O2 sensor. Posted December I just bought a 2008 Legacy GT Sedan, 5MT a couple weeks ago. an OE cat will stabilize o2 measurement while an aftermarket hi flow cat might not and trigger the code. We then Hi all, looking for some help with my cruise control on my 05 legacy GT. 3. . Akimbo the second your car was not right you should have been in contact with your insurance Hey guys, I'm getting p0172 code on my 2005 Subaru legacy gt and I've already checked for a boost leak, changed the upstream o2 sensor and changed my mass air flow The 05-09 Subaru Legacy GT Cobb Tuning Catted Downpipe is fabricated from 302 stainless steel for added corrosion protection. Fourth Generation Legacy (2005 - 2009) Need Innovatives' website lacks a little on detail. Dealer service "could not verify the problem". Car is a 2006 JDM LGT Spec B six speed manual. 5GT/Turbo. Fourth Generation Legacy (2005 - 2009) O2 sensor failing O2 sensor failing. 05 LGT 5EAT W/CustomVF40, 14' Fiat 500, Posted November 27, 2013 One time way back in November I saw the code P0141 (O2 sensor heater circuit, bank 1 sensor 1), but since then this was the first time I saw anything relating to the O2 sensor. I got my bent valves repaired and am starting Cryotuning. smahon207. 5i. Labor costs are estimated My car is an '05 Legacy 2. Posted April 25, 2011. Posted June 16, 2010. A local dealer is trying to rake me for $435. I have a COBB downpipe and usually the WB O2 sensor would go in the aftermarket bung COBB has I'm trying to diagnose a o2 sensor or cat problem (generic cat efficiency cel) and I wanted to see all 5 of the o2 sensors my car is equipped with. a local tuner here used that clamp for a while and was pissing through o2 sensors since our tailpipes and bumper dont So using an obd tool i got the code p0051 for my 2004 Legacy (35th Anniversary Edition) and subsequently changed the bank 2 O2 sensor 1. Otherwise they would need 2 sensors, one for each bank. Car: 2005 Legacy GT limited 5mt Posted March 8, 2021. 0 GT Share; Posted August 29, 2023. I replaced the upstream o2 sensor just because it was old(im at 113k) and the downstream sensor because an Just this week I traded for a 05 LGT. or. If the car is still running fine, I would guess all you need is the rear o2 sensor as your When I installed headers on my '99 2. 4) P0131 -> O2 Circuit low voltage The TPS is the code that probably led to whatever happened last night. It monitors the fuel to air ratio and tells the engine management If you had an issue with the front O2, it might have thrown the A/F off some, and caused the rear O2 to falsely throw the code. By f85stealth August 5, 2017 in Fourth Generation Legacy (2005 The front O2 sensor (bank 1) is in the Fourth Generation Legacy (2005 - 2009) O2 Sensor Questions O2 Sensor Questions. I recently replaced the clutch but after starting it up and attempting to relearn the tps I was unable to. I've always been a Subi fan, I currently own a 98 legacy GT Limited and I used to have another Just finished my 2005 legacy gt turbo budget build and runs good but that's all I'm lacking to complete it, besides a new hood latch. mwiener2. They don't list part numbers with the product description and when I ordered the front sensor, they sent me the rear one. It includes wiring up the signal wires so the WB output can be read by the ECU. 5i auto. Dudes, Update: Bought a replacement O2 sensor for "subaru legacy" from The Parts Bin, wrong part (too short, wrong Car: '05 Legacy GT Wagon 5MT Posted July 16, 2007. Curious which one is bank one. FITMENT - O2 sensor fit for 2000-2002 for Subaru Legacy, 2000-2002 for Second Generation Legacy (1994 - 1998) O2 sensor extension O2 sensor extension. I know on my '05 OBW, one of the upstream sensors is the Air/Fuel Ratio sensors used by the ECU to adjust mixtures I just talked to Subaru Sherman Oaks and they quoted me $109 for the sensor. Looking to replace it myself. Git 2 revisions and David says I need to provide my Fits Legacy, Outback Oxygen Sensor A failed Oxygen Sensor will often have no noticeable symptoms beyond a check engine light, but it does cause your Subaru to operate inefficiently and produce higher emissions. Car: 05 JDM Legacy 3. Follow my video and save your money. Couple of questions: There's a sensor in the exhaust down pipe before the o2 sensor seems to have Car: Rare Bird - 05 Legacy GT 5MT LTD Wagon Posted August 31, 2006 (edited) I got an O2 sensor (stripped mine) from a US dealer that cost me $99USD. Members; 330 Car: 2005 Subaru Legacy GT Author; Posted May 1, 2014. Hey guys, Just wondering if the o2 sensor on the header is different from the one on the down-pipe or is it the same? Thanks! O2s bank 1 sensor 1 is the upstream? This is a ‘05 legacy i the reading is just stuck on 2. Car: 05 LGT 5EAT W/CustomVF40, 14' Fiat 500, Posted November 14, 2013. CHECK your oil, these cars use it. What is happening, as I understand it, is the ECM is comparing the front and rear O2 sensor How can I test my upstream O2 sensors (on my CA spec 05 Legacy 5 speed) to see if they are working to spec? Closest I could find on forum was to use an infrared thermometer Using our oxygen sensor can significantly reduce fuel costs and improve engine performance and fuel economy. I was told that it would be on the left side (driver side) of the engine, but I still can't see Says O2 sensor bank 1 sensor1. My 05 wagon with 16K miles also has the idle misfires, but no CEL. I found an 05 GT with ~80K miles and a decent 2005-06 Legacy GT's have a catalytic converter inside the up pipe before the turbo, replacing gets you ~10whp and might save your turbo. Fourth Generation Legacy (2005 - Genuine Subaru Legacy Oxygen Sensor Oxygen O2 Sensor. Do i absolutely need this? I already Hi guys, Im getting a check engine light and it's showing the code P0037. I had a code for the front o2 sensor. About 100,000 miles total; engine was rebuilt (rings, bearings, etc) and new . So this morning I started checking on this issue. Same Car: Subaru Legacy 2. Car: VF52 05 Legacy GT 5MT Share; After doing some Subaru Legacy Oxygen Sensor Replacement Costs A Subaru Legacy Oxygen Sensor Replacement Cost-rear is estimated between $158 and $268. Bought the Denso part 234-4445 from rockauto and it was a perfect fit. In the process of the installation the tech working on it snipped the sensor that's right in front of the Hi all. By abarnesDLGT July 22, 2014 in Fourth Generation Legacy (2005 - 2009) Recommended Posts. Oxygen Sensor Upstream; Bank Replace upstream O2 sensor; GTEASER's 2012 Legacy GT - Sold. GTEASER's 2009 XTeaser - Sold. When I went out and pulled the parts, I was surprised to find that there was already an OEM I'm working on an 05 legacy gt turbo. What exactly does zeroing af correction 3 and these other mods do? Sounds intriguing Link to comment DR I brought the car in garage and hooked up scanner. it depends on the cat. Dirty or failing fuel injector(s) which stick slightly open and don't control fuel flow properly. Now I got it and the Sensor connector is different so I need a different sensor. The code will not I have a 05 legacy gt (manual) and I need to replace my upstream o2 sensor but i'm confuse where my Upstream o2 sensor is locate. I figure I'll just replace the sensor (tried cleaning it per a friend's suggestion. NOTE: This is a fix for 05-06 that are removing the o2 sensor from the UP. Part # 22641AA25A I did some Fourth Generation Legacy (2005 - 2009) All Activity; Home ; Model Specific Forums ; Fourth Generation Legacy (2005 - 2009) How to replace the O2 SENSOR (A/F SENSOR) to remove the CHECK ENGINE LIGHT for SUBARU LEGACY GTB WAGON. By legacygt31 May 16, 2009 in Fourth Generation Legacy (2005 legacygt31. Shop for the best Oxygen Sensor for your 2005 Subaru Legacy, and you can place your order online and pick up for free at your local O'Reilly Auto Parts. Legacy Wagons, along with their Outback counterparts may experience wiring harness failure at the connecting Replacing that front O2 sensor helps the engine tune the fuel/air ratio better and can result in better gas mileage (it did for me @ 89k). By Ares3985 September 13, 2019 in Fourth Generation Legacy (2005 - 2009) Share I've burnt out my Innovate Motorsport Wideband O2 Sensor in less than 9months, probably because of shock cooling. Sadly the car could not be mapped correctly as the O2 sensor was giving 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20. Is this something easily replaced (no need to jack it up/remove major componets) and if so is this Low Idle Problems 05 Legacy 2. - 2005 Legacy GT (VF52+) / 2012 P0133 o2 Sensor Slow Response (Bank 1 Sensor 1) 2000 Subaru Legacy GT Limited http://i2. The CEL is on for code P0037. So im pulling a p0420. (SOLD). Read it with a V1 ap and that's what it saidwhich from what I've looked up is a "injector air control valve". (~120k miles) Won't a clogged catalytic converter My 05 legacy Gt is doing the same thing. The rear O2 sensor has given up on life and needs replacement. Model. My LC-1 went bad so I ordered an LC-2. Now I'm back to OE manifolds and want Last Year My girlfriend and I purchased a used 2005 Subaru Legacy GT. It does not fix other cel nor should it. 00 for Oxygen Sensor Bank 1 Sensor 1 Heater circuit low, and Oxygen Sensor Bank 1 Sensor 2 heater circuit low. Previous owner told me the dealer said he needed a new catylitic converter. com. The sensor plugs into the wideband gauge so you don't P0420 is a cat efficiency code. It looks like a pretty long wire and Camshaft position sensor, o2 sensor Camshaft position sensor, o2 sensor. Rob After a new O2 sensor and coil and a total of 500$, the car runs great. Its an 05 legacy gt with 156k miles on it. Fourth Generation Legacy (2005 - 2009) Fourth Generation Legacy (2005 - 2009) o2 sensor question o2 sensor question. I'm curious, so bear with me while I partially hash this out. 8psi, 280whp, 300ftlbs. some are better Fourth Generation Legacy (2005 - 2009) Which O2 Sensor is the upstream? Which O2 Sensor is the upstream? By Iltl32 March 12, 2018 in Fourth Generation Legacy (2005 - Car: '05 Legacy GT Ltd. More sharing 3) P2138 -> Throttle Posistion Sensor "D"/"E" voltage correlation. Unplug and unhook the O2 2006 Legacy 2. Came with tube of anti sieze, and it Hello All, Decided it was finally time to install the up pipe I had sitting in my room. It has a decent amount of mods done Exhaust & Emission Parts and More for Your 2005 SUBARU LEGACY at Reliably Low Prices. Car: 2005 Legacy GT Posted November 15, 2010. At first I thought it was a So I'm getting ready for my install of tmic, injectors, pump (Already stage 2 + vs-52) and my tuner says that I need a wideband o2 sensor. Fourth Generation Legacy (2005 - 2009) O2 sensor location Hi there, I got the code p0030 for my 05' Legacy 2. Archived. 5 DOHC Outback I had to put a spark plug spacer in the #2 O2 sensor bung to get rid of a code. By relative4 November 30, 2017 in Fourth Generation Legacy I recently installed exhaust on my car (up pipe downpipe and cat back). By darthqwo August 29, 2020 in Fourth Generation Legacy (2005 - 2009) Share More sharing Hey guys, I have a 2008 Legacy 3. Installing my new MAP sensor and IAT sensor this weekend. Members; Was wondering if Car: 2005 Subaru Legacy GT Posted April 29, 2014. By Turkeylord July 14, 2015 in Tuning. 5XT) O2 sensor's Over the past few weeks I have been trying to diagnose a problem I've been experiencing with my 05 Legacy GT. Existing user? I check my OBD Code it was the O2 sensor. 197-6040 I can disconnect the rear O2 at the its plug, so ECM is now blind to it and I do an actual digital volt meter test of the sensor pins and it reads a good wide range of voltage Got an 05 Legacy LGT and have been trying to located the knock sensor, but can't find it. All said and Hoping someone can help me out with this one 2005 Legacy Sedan 2. Car is a 05 legacy sedan 2. Clean the MAF every So I had codes for O2 sensor and lean bank 1. Select Vehicle by Model; Select Vehicle by VIN; Select Vehicle by Model. com/albums/y13/GangusKhanh/IMG_0341. 5i Low Idle Problems 05 Legacy 2. Our technicians have Car: 05 LGT, 97L WGN, 08 FXT, 92 Skyline gts4 Posted October 28, 2015. 798v which I think is full lean? Jump to content. Innovatives' part I walk you through how to change the upstream oxygen sensor on a 4th Gen Legacy GT. 2005-2009 Subaru I own a JDM Legacy GT 2007 and have bought the AEM AFR Gauge. I replaced both Sensors with the Denso brand. 5i non turbo, rear O2 sensor. Your Choice of Quality. The dealer told me its a Bank 2 sensor 1 front air fuel ratio sensor failure. LegacyGT. I searched and it sounds like it may be the O2 sensor. 88k miles, one owner, 100% stock. A couple of weeks ago my check engine light came on. Go. Posted July Car: 05 Legacy GT/15 Chevy SS Sedan Posted December 8, 2008. For posterity's This may sound dumb, but the only thing keeping me from starting my new engine is finding where the front (the one on the manifold) o2 sensor plugs in. 22680AA31A 05-09 Legacy, all models except 08-09 2. GTEASER's 1992 Legacy SS - Sold. I'm over my warranty, and the dealer (who's been great so far) is telling me it's gonna' Car: VF52 05 Legacy GT 5MT Share; Posted May 29, 2014. By Jimblaz July 23, 2010 in Fourth Generation Legacy (2005 - 2009) Recommended Posts. photobucket. Im a new 2005 GT Limited owner as of 3 weeks ago and I love the car. The other side feeds the fuel injectors. Is I've had to take my LGT in to the dealer twice in the past week for the same CEL. A quick In November my 2005 Subaru Legacy GT Limited with 129K had a CEL/blinking-cruise of P420, so we replaced an O2 sensor and the CEL came back 60 miles later. jpg Third is the old O2 sensor and its side of the adapter. By Warm_N_Moist December 30, 2022 in Fourth Generation Legacy (2005 - 2009 Again, to sum up: the placement of the factory O2 sensor at the absolute worst will make you think your car is running leaner than it actually is--meaning the AFR tune is safer At 90k, change out the front O2 sensor and MAF sensor. I decided to save some money by replacing it myself. fyi all 05 + legacy's have built in code reader. Jimblaz. This makes How's it going everyone, first and foremost I'm asking for help with my fathers car, its not my car. By rbriggs2 August 20, 2011 in Fourth Generation Legacy (2005 I took it in because it was in need of an hey there I would like to ask what is the best up pipe and down pipe to use to upgrade my legacy gt and my is a 2006 with 189050 on her. Plan on checking the TMIC, cleaning the AVCS oil valves and screens, and replacing the Along with a brand new and genuine O2 sensor. This seems to be very common unfortunately. This topic is now archived and is closed to further replies. Infosecdad 05 LGT MT Wagon/05 OBXT 5EAT/05 OBW 2. I'm wondering, could I just chop of the connector of the Stock on and replace the new one with the stock connector? I decided to go with the upstream O2 sensor aka the Air/Fuel ratio sensor as the POO31 code refers to the heating element in the upstream O2 sensor going bad. When the O2 sensor goes bad, it causes improper air-to-fuel mixture in the • 05-07 Legacy Wagon / 05-09 Outback hatch wiring harness. and supposedly my First off, hello and thank you all for all the resources you post on this site; very helpful. 0R Spec-B BPE 6MT Wagon Posted Car: '05 Legacy GT Ltd. It say before the catalytic converter but when Fourth Generation Legacy (2005 - 2009) O2 Sensor fix O2 Sensor fix. By Max626 October 11, 2017 in Second Generation Legacy Members; 76 Car: 98 Fourth Generation Legacy (2005 - 2009) 02 Sensor 02 Sensor. The first time they diagnosed it as a bad O2 sensor, replaced it, and I was on my way. Fourth Generation Legacy (2005 - 2009) Stage 2, both O2 sensors dead- help! Stage 2, both O2 sensors dead- help! By Mobius118 August 22, 2011 in Fourth Generation Fourth Generation Legacy (2005 - 2009) Lower O2 sensor extension pigtail Lower O2 sensor extension pigtail. 70 however the car was fueling First Mods 05 Legacy GT. By gmartinez1900 October 8, 2015 in Fourth Generation Legacy (2005 - 2009) Recommended Posts. Year. Engine Build - Click Here Car: 05 Legacy GT Limited Share; Posted March 4, 2015. All you need is the right tools and Rear oxygen sensor location on '06 legacy Rear oxygen sensor location on '06 legacy I can see the cat clearly from the top, but see nothing that looks obviously like an O2 Car: 05 Legacy GT Share; Posted June 5, 2012. Fast Online Catalog. Car: 05 GT GRP 6-speed wagon, BNR18G Share; Posted January 12, 2012. please help thanks. Car: alright so i need an answer ASAP, i have a 05 LGT, one of the previous owners made a custom 3" DP with no cats and no O2 sensor, it has a Y-Pipe starting at about 6 Fourth Generation Legacy (2005 - 2009) premature O2 sensor failure premature O2 sensor failure. New to this forum. What's going on guys, this is my first post on the forum! I tried looking through threads to find some information but Turbo Powertrains (2. Second Generation Legacy (1994 - 1998) The problem seems to be O2 Sensor 1, Bank 1. By andyng November 18, 2010 in Fourth Members; 1 Share; Posted Beware of using that site for ordering the o2 sensor. 5XT) All Activity; Home ; Technical Forums ; Turbo Powertrains (2. gmartinez1900. 5i A stock downpipe has two converters, one up near the turbo and one just behind the rear O2 sensor. By Agrachael December 30 9 Share; Posted December 30, 2012. By jmercado567 December 10, 2005 in Fourth Generation Legacy (2005 - 2009) Recommended Which CEL code did you get - Bank 1 is front O2 and Bank 2 is rear O2 I don't want to comment on the connector because of JDM - but rear O2 clips in just off the side of the gearbox case and the front O2 is up next to the Car: 05 Legacy GT 5mt Stg I Act/Wrx Setup Share; Posted July 10, 2008. I bought a Denso 234-9122 Sensor. Can anyone explain the odds of both O2 sensors going bad within a week. Car: 05 Big Winged Legacy GT, 13 Red BRZ Posted June 3, 2015. Also, the wide band is placed in the downpipe, post turbo Car: 05 Legacy GT, 5EAT Posted December 24, 2013. See below The stock O2 sensor is not sufficiently accurate at the end of its range to tune your car properly for a custom tune. One side of the relay feeds the O2 sensors. Share; Posted March 25, 2009. Recieved a P0037 fault code. Im still dealing with So I recently purchased a 2005 legacy GT wagon in july, and for the last couple months it's been bucking. Bad coil or bad injector. That said, it's possible that moving the rear O2 sensor a bit farther forward Found my surging problem while driving was a bad O2 sensor, according to the dealer. 5GT, 2. legacygt31. I replaced Car: 05 LGT 5mt 371hp on 91oct & 06 OBXT Share; Posted September 15, 2010. These are maintenance items IMO and since they deal with fueling, it's good to change them out every 75k+. Cleared CEL for a day or two). The end flange uses the stock donut gasket and factory Fourth Generation Legacy (2005 - 2009) O2 seonsor spacer? O2 seonsor spacer? By RJS5689 March 15, 2010 in Fourth Generation Legacy (2005 - 2009) Recommended Fourth Generation Legacy (2005 - 2009) EGT Sensor EGT Sensor. Make. If you're in Austin, TX and having difficulties with the dealer or any Fourth Generation Legacy (2005 - 2009) O2 Sensor replacement - P0031 - 2004 JDM BP5 5EAT O2 Sensor replacement - P0031 - 2004 JDM BP5 5EAT Posted March 14, Fourth Generation Legacy (2005 - 2009) O2 sensor O2 sensor. Read this thread and try the Where is the O2 sensor heater relay? (Legacy GT 2004) Gen 2 . 22680AA38A 08-09 Legacy 2. adrenalinecrisis. I have been watching videos trying to find my Bank 1 Sensor location, and most if not Though it's safe to drive with a broken o2 sensor for your Subaru Legacy, it's counterproductive to your vehicle's performance. Link to comment Share on other sites. I replaced that yesterday. The fact that you have a trouble 1 Installed new O2 sensor from Denso: 234-9123 (this is the OEM version from AutoZone) 1a) Confirmed 3-4 ohms resistance across heater terminals Administrator's edit - The following is a guide for wiring up a wideband (referred to as 'WB' from now on) 02 sensor. 0R So I have a CEL code P0051. Full Manufacturer Warranty. Is there any chance that the o2 sensor in the DP is sending Car: 05 Legacy GT/15 Chevy SS Sedan Share; Posted February 21, 2010. On my 08 facelift bl5 legacy the o2 sensor was not giving a reading was stuck on 14. Thanks to td-d I have the memory addresses to disable learning D and already disabled AF correction #3 and my Car: '05 Legacy GT Limited Wagon 205k stock Author; Posted November 11, 2017. volodyalysak. I had to drop The other day my engine light came on, and I took my 97 Legacy GT Subaru in, the guy said it was my O2 sensor. DIY-Easy. Car: 06' Legacy After 233K miles, my current Subaru WRX is at the end of it's useful life so I decided to try my luck with a Legacy GT. Lost an O2 sensor and an injector have 58k miles on it. Where is the location of both O2 sensors? I have the P0134 code telling me my front sensor needs to be replaced. It was running just fine, had a slight low/rough idle when stopped. Faulty O2 sensor reads richer than real AFR. 226k miles. I wonder where it should be since I didn’t went under the car yet. Posted May 1, 2014. I can't imagine that kind of crimp job is from the factory. Posted May 16, 2009. Members; 2 Car: '08 Spec-B Author; Posted April Its amazing to me that an O2 Wideband install involves 4 manual wire connections: switched power, power ground, signal out, signal ground. You have to be careful when buying the front O2 sensor on the 05's because there were like 700 I know what most the parts are, and G is the primary o2 sensor, or as Performance Subaru of New Orleans likes to call it the Fuel/Air Ratio Sensor, and NOT an o2, as well as Logging Wideband O2 Via The TGV Sensor Input Logging Wideband O2 Via The TGV Sensor Input. "P1130" SUBARU Code - Front Oxygen Sensor Circuit Mal Fuse box diagram (location and assignment of electrical fuses) for Subaru Legacy (2005, 2006, 2007, 2008, 2009). Fourth Generation Legacy Fourth Generation Legacy (2005 - 2009) 05 LGT - MPG low/troubleshooting 05 LGT - MPG low/troubleshooting. The 2005 legacy 2. Deleted the midpipe cat (which I was told by the shop wasnt monitored anyway?) And deleted reso and mufflers, cus exhaust sound. All flashing lights on the dash and code reader states bank one o2 sensor id faulty. I'm new to the Subaru world and I've tried researching this issue but can't find anything quite like what I'm My 05 does. I Just did the job on my 2006 legacy 2. Could this be a code for the cat? Also my cruise control light flashes Been throwing a p0066 code for a while now. I am now getting a p0151 code Fourth Generation Legacy (2005 - 2009) O2 sensor O2 sensor. This is the bank 1 sensor 2 O2 sensor. Hey all, replaced o2 sensor 2. Only on idle, drives just fine, boost comes on fine and everything! I put in new OEM spark plugs as soon as I got it and checked all coilpacks for corrosion and So I ordered a front o2 sensor but it turns out it's for 02-04. Before you dig too much, reset the codes, if you TS has the O2 sensor after the turbo because the gasses from all 4 only mix for the first time in the turbo. Rob +1 Car: 2005 Subaru Legacy GT Limited Posted November 14, 2013. Share - Android app/Bluetooth My friends '05 OBL still needs to have the front O2 sensor replaced - I tried to get it off last year with just a special socket and breaker bar, but it was a lot stronger than I am. By hlxdrummer May 11, 2016 in Fourth Generation Legacy (2005 - 2009) I'm sorry I'm sure this information is on here already but I can't find anything by searching 'o2 sensor test' I'm looking for Legacy specific instructions on how to test the 02 My car ran like crap when the front o2 sensor was causing a code needing to be replaced. 0GT, 2. Subaru part number is 22690AA690. Posted January 20, 2013. Posted October 8, 2015. Not really. just make sure the o2 sensor is point down in that. IceCold81.