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Denso

Denso 234-9123 Oxygen Sensor (Air And Fuel Ratio Sensor), Regular (2349123)

  • Based on 473 reviews
Condition: New
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Availability: 12 left in stock
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Arrives Nov 25 – Dec 7
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Features

  • Efficient Fuel Consumption
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Fit type: Universal Fit

Description

Denso Air and Fuel Ratio sensor is designed to detect the amount of the exhaust gas air and fuel ratio. It is constructed from durable material that is corrosion and abrasion resistant. This sensor features zirconia solid electrolyte integrated with alumina heater substrate which precisely controls the amount of oxygen concentration that flows into the diffusion layer to limit current flow. This sensor can easily be installed and ensures longevity.

Brand: Denso


Item dimensions L x W x H: 5.75 x 2.19 x 1.88 inches


Material: Zirconium


Item Weight: 4.8 ounces


Style: Regular


Brand: ‎Denso


Item dimensions L x W x H: ‎5.75 x 2.19 x 1.88 inches


Material: ‎Zirconium


Item Weight: ‎4.8 ounces


Style: ‎Regular


Mounting Type: ‎Threaded


Specific Uses For Product: ‎Oxygen Sensor


Manufacturer: ‎DENSO


Model: ‎_


Product Dimensions: ‎5.75 x 2.19 x 1.88 inches


Country of Origin: ‎China


Item model number: ‎2349123


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Machined


Manufacturer Part Number: ‎234-9123


Date First Available: January 2, 2007


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 25 – Dec 7

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • OEM Quality
I installed this sensor on my Subaru as part of regular maintenance. Since it is OEM, it fit perfectly, and the cable clips were in exactly the right spots. It has performed with no problems.
Reviewed in the United States on April 23, 2024 by Kyuzo
    • A good deal on OEM sensor for a Subaru.
I bought this as an upstream sensor for 2007 Subaru with a 2.5 liter engine to replace an original after 225,000 miles. It came with some copper anti-seize compound. It looked like the original with one important exception-the wire connector was different than the original one in my car. I checked the part number several times, and even ordered another one from my local parts store to check it-the numbers match but the connector is different. Perhaps there was a change made after my car was made. Because I needed to get my car back together, I cut the connectors off and swapped my original onto the new sensor-the wires are the same, so it was just a minor challenge, but cutting into an expensive part made me nervous. The sensor has worked well-no check engine light, and the scanner showed fast response and good fuel trims. After almost 6 months and more than 10,000 miles, this is still working. There have been no error codes, fuel mileage is what I would expect and the engine runs great. Update. Almost 2 years later the engine is still running strong, good fuel trim, no sensor-related check engine light. Update. I got another one of these for another car, and in the process learned why I thought the connector was wrong. It has a plastic protective piece that I thought was part of the connector itself. Removal of the piece revealed the correct connector. That was a critical thinking problem on my part, and realizing the error of my ways has hopefully made me a better person in some small way. ... show more
Reviewed in the United States on September 11, 2017 by Fred Oliver
    • Go only with Denso- oem supplier to subaru
it fit perfectly as far as the connector was identical oem. you want to only go with denso which is the oem supplier for subaru. price from this vendor is great, best i have seen anywhere. new at oreilly etc was $50 more cost! ck engine lite went out immed, car runs so much better as this going bad really messes up the fuel mixture- makes car run rich, so gas mileage is better and it runs way better, more power etc. this is the upstream 02 sensor, which is the one that takes the worst beating of the two 02 sensors in any vehicle. it should be replaced about every 80k miles, the downstream one can go longer. funny but my ck engine lights just got thrown, runs fine but something threw that, could be downstream sensor but car only has 90k miles so it should not be going bad this soon. supposed to go like 150k or more even because its downstream of the catalytic converter so it gets cleaner air and doesnt go down as fast as upstream which gets raw untreated exhaust. i did a ohm test on downstream and it was in spec, i did upstream prior to replacement and it was showing out of spec. ck engine analysis cemented the fact it needed replacement at about 90k mi, but actually the lite was throwing at about 84k. newer subarus are more sensitive to sensors, mine is a 2010. 2008 and older are not nearly as effected by sensor health as 2009 and newer. ... show more
Reviewed in the United States on October 29, 2017 by John B. Rogers
    • This does work with a Subaru unlike the Chinese brands
If you have a Subaru that needs a new air fuel sensor or front oxygen sensor this would be the one to go for this will turn your engine light off as long as the sensors the issue unlike the Chinese replacement sensors which will give you issues with the heater circuit worth the price cuz they actually work do yourself a favor if you're going to replace your sensor do it with a Denso on a Subaru ... show more
Reviewed in the United States on February 28, 2024 by PA
    • so if an offset O2 sensor socket doesn't break it loose pretty easily, just pull the headers
Direct replacement for 2006 Impreza (and many other models and years). First one leaked air through the stem right out of the box. Amazon took the return no problem. Some installation tips: getting the old one out is the hardest part. They often get really baked in there. Removing the headers isn't that hard, so if an offset O2 sensor socket doesn't break it loose pretty easily, just pull the headers. If the old one comes out easily then this one should go in easily. If the old one needed a lot of persuasion, it would be smart to get a thread chaser and clean out the female threads before trying to thread this one in. Once it's installed, tape a shop vac hose on "blow" into the tailpipe to build up a little pressure in the system and spray any joints you messed with (o2 sensors, headers) with soapy water. Bubbles = leaks. ... show more
Reviewed in the United States on April 26, 2016 by DesolationRow
    • Factory part subaru uses
This is what subaru uses in their cars aftermarket parts that are cheaper don't usually work properly in a subaru or they work temporarily and you end up buying the original part. Still 50 to 60 dollars cheaper than buying locally for the same part
Reviewed in the United States on February 11, 2024 by Amazon Customer
    • Swapped out easily, fixed 420 error code!
Car started throwing 420 cat converter code, which this solved immediately. This was very easy to swap out, literally unplug and unscrew old sensor, and plug in new one.
Reviewed in the United States on January 29, 2024 by S. Chanchanian
    • OEM is still the better choice
While the aftermarket does provide a good amount of products as replacement parts. There are still some area’s that the OEM replacement parts are the only choice to use. This comes from personal experience in the automotive industry as a mechanic.
Reviewed in the United States on January 21, 2024 by PacNWLady

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