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Ro & Art
Reviewed in Canada on February 11, 2025
Easy to replace on my 2009 Subaru Impreza, and the car runs great again.
Customer
Reviewed in the United States on April 6, 2025
Crowfoot wrench is the way to go.
Vladislav Dzhurinskiy
Reviewed in Canada on August 29, 2024
Fits to my Forester 2009 like original part.Come with copper grease with original Denso box.No issues et all during the installations was happened.
Heather
Reviewed in the United States on August 24, 2024
still looks new, performs like new. still had anti sieze applied and the tube of extra was with it. OEM sensor, saved $20+ and my Impreza now has no lights on the dash at 180k. Don't listen to the people who say buy a catalytic converter first. 🙌🏻
Tran Van Luong
Reviewed in Australia on June 3, 2024
its only work 1 year then have a same issues with the same code readingbought it last yearso disappointed with it
The end of storefronts
Reviewed in Canada on December 17, 2024
Works perfectly with my 06 Subaru Impreza. Was able to replace my old ones with these in 15 minutes. Easy
Customer
Reviewed in the United States on November 12, 2024
I own a 2008 5MT Outback with over 200k. The car has been fantastic. For the last couple years I've been getting a random "Catalyzer below threshold" code. I thought it was time to replace the cat converter (not surprising giving the miles). But I decided to try the anti fouler bung on the O2 sensor. It worked for a while, but my check engine light kept coming back while in the highway, disabling my cruise control (some "lean condition" code. On these Subarus, and many newer cars, the downstream sensor (after the converter), is not only to check the efficiency of the converter but also has something to do with the fuel trim). I finally decided to replace both O2 sensors (the car well deserves new sensors after all these years), and sure enough, the check engine light has not returned, engine runs smoother, and I should expect some improvement in the fuel mileage.So, if you're on the same boat, replacing both O2 sensors quite probably will do the trick, and it's way cheaper than the catalytic converter.One last thing....as many people before me pointed out...don't use cheaper sensors. These Denso ones are OEM, and work fine.
Dawne
Reviewed in the United States on August 10, 2021
Perfect fit!! Easy to install once old one is removed. Special removal tool is helpful.... I used the "Aoerzn Premium Offset Oxygen Sensor Socket, 3/8-Inch Drive, 7/8-Inch (22mm)". Worked great.Came with original Denso box (see pic) and enough copper anti-seize to do 3-4 sensors.This is the EXACT part you would get from AutoZone. I know because I bought one there too because Amazon was super late in delivering and I needed to get it done.Our car was throwing a P0031 code. I replaced BOTH sensors (which is recommended). Other sensor was a 234-9123. Soooo glad I replaced both because the car is more zippy now.Note: Be careful removing the old sensor. If it won't budge, the pipe may needed to be heated to a cherry red with a torch.PS... If you find this comment helpful, please hit the "helpful" icon. Thx! 🙂
Nizidramaniiyt
Reviewed in the United States on January 23, 2018
I installed this sensor on a 2012 Subaru Impreza. Those of you with an intimate knowledge of O2 sensors will realize that this is not the correct part number for the car. I needed the extra length of wire so that I could install an O2 sensor spacer to get rid of a P0420 code.Here's a little bit of information on Subaru O2 sensors if you're interested in interchanging them.Almost all Subaru use exactly the same O2 sensor connectors. The only difference is the length of the wires and the use of a shield.Here are most of the part numbers used on Subarus and the information on them.Number ------------ Length --------- Shield234-4513 ----------- 7.48 ------------ Yes234-4445 ---------- 20.87 ------------ Yes234-4732 ---------- 21.26 ------------ No234-4195 ---------- 14.88 ------------ No234-4908 ---------- 20.24 ------------ YesKeep in mind that Denso is the OEM supplier for Subaru on their O2 sensors, so you can feel confident that this part will work for your car and save you some money.
Adam
Reviewed in Canada on January 20, 2018
Works great so far in my 2009 Subaru Outback
AzInOh
Reviewed in the United States on July 27, 2017
Since I bought this car (used) it had a constant engine knocking in spite of c replacing knock sensor, using higher octane fuel, etc.Then one day the check engine light came on indicating a bad rear sensor which is accompanied by engine almost stalling when moving from dead stop (yes this is a manual transmission)Bought this part and installed it myself, and voila engine knocking went away and dead stop takeoff is better than ever. Also noticed that MPG and acceleration has improved.Very happy with the outcome. And yes the rear oxygen sensor it's a bit hard to reach but can be done. I also bought the socket specially made for removal/installation of the sensor.
Brad
Reviewed in the United States on February 4, 2016
Perfect fit and replacement of OEM part of a 2006 Forester X, including the wire plug, wire clip, and even the insulation color. Includes way more than enough anti seize grease.The car has been throwing occasional check engine light codes about the catalyst being below efficiency threshold. More recently, it threw a new one about running too rich. I replaced both sensors. They had 180,000 miles on them. Hopefully, this should fix things. These tend to last a long time, but not forever.This can be done under the hood if you are a bit of a contortionist. A 22mm or 7/8" open end wrench will sometimes get it, but mine was too tight. There wasn't enough room to get the wrench on it where I could apply much torque at all. Got a split crow's foot style socket (don't think a straight socket will fit with this car), and a long extension bar. I had to remove the air filter box, a simple thing, to get the bar in the right place. Once it broke loose, I was able to finish by hand. Don't over tighten. It only needs about 15 foot pounds, about what a spark plug needs. Get it too tight, and it'll be a BEAR next time.
Customer
Reviewed in the United States on August 2, 2015
Installed this on my 2006 Subaru Forester as a best guess to try and fix OBD code P0420 and it worked! Since the original O2 sensor made it to 180,000 miles, I can't complain. This sensor did not have anti-seize installed or with a packet and the packaging was pretty beat up, but it went in without a hitch and the connector matched exactly. Been 500 miles and no code yet so all is well. Had a hell of a time getting the old one off until I bought this:
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