Denso234-9017 Air Fuel Ratio Sensor

This Denso product is a drop-in replacement for the $240 - $300+ OEM Honda part. If properly installed and codes cleared, a CEL will instantly disappear upon restart.IIRC, if you have a 2001 - 2003 Civic EX, this is the wrong part as they used a different, less expensive on-off O2 sensor in the same place, vs. this Denso wideband A/F sensor which provides gradients for richness/leanness. They are not the same thing -- don't get an O2 sensor thinking you're saving all this money, when the spec calls for a wideband A/F sensor. It *will* throw a code, and now you have to pay for the A/F sensor on top of a useless O2 sensor.I have a 2004 Honda Civic EX with the D17A2 engine... with a jackstand to prop up the LH front jack point, this job was literally ten minutes. Be sure to remount the wire properly in the chassis' wire holders, or it could contact the exhaust and damage the wire. One crowfoot sensor wrench, 3/8" rachet, and the copper anti-seize provided with the sensor, and you can definitely do this yourself, with little to no wrenching experience.I added some dielectric grease to the sensor pin female receptacles in the connector, just to stave off corrosion, before reconnecting. A CEL that'd been on since buying the car used a week ago (and no telling how long before that), disappeared upon restarting the car and hasn't been back. My mileage after the swap went from 31 to 34 without any change in driving style -- liberal A/C use and heavy throttle.No need to look any further, as I've not been able to find a comparable Denso sensor, referencing the Honda part number (36531-PLR-003) anywhere online for less than here. Considering a wideband A/F (Honda calls it 'LAF') sensor's more expensive construction this price is more than fair for an OEM replacement. :)P.S. -- btw, I read my codes with a Bluetooth code reader sold here on Amazon as well. As long as you have a nice Android smartphone (I have a Samsung GS4), download Torque from the Play Store, then purchase a BAFX BT OBD2 code reader. Here is the URL for the ad, cut & paste into your browser: http://www.amazon.com/gp/product/B005NLQAHS/ref=oh_details_o09_s00_i00?ie=UTF8&psc=1This code reader is the only one among many BT readers that actually has the proper circuitry to handle different protocols, not to mention current spikes (which can brick other cheaper readers). $24 for the BAFX and $5 for the full version of Torque on your smartphone, and you can read and clear codes on your Honda just as well as a $60 - $120 purpose-built reader. ;)

My 2005 Honda Civic EX SE was throwing a pair of codes; P0134 and P0135. The local Honda dealer said that the culprit was the rear heated O2 sensor, and quoted me $567.73 (the downstream O2 sensor itself was "special order", $404.73 and would take 2 weeks to arrive). After my initial shock, I turned to Amazon and got upstream and downstream replacement sensors in 2 days. I popped the hood and removed the upstream Oxygen sensor using a crescent wrench, and then the downstream sensor with a special socket after cutting the leads.I replaced the downstream sensor  Bosch 13534 Oxygen Sensor, OE Type Fitment  first, and it fixed my P0134 code, but the car was still throwing a P0135 code. So, I then replaced the upstream sensor with this Denso unit (nearly identical match), and both codes are now gone. This Denso OEM part came with anti-seize compound already on the threads, although they also included a small tube of the stuff.Both parts fit perfectly, and were quite simple to install. For a comparison, they were easier, faster and cleaner than replacing oil. Overall, I am quite pleased with the result, particularly with the vast savings over the dealership. $567.73 for just one sensor (the less expensive one) is absurd, and I can only imagine what they would have charged for the upstream sensor after they realized that just one sensor would not fix both codes.

Great price. This is also the same brand that Honda uses. I took my old air fuel sensor out and it was the same--this brand – Denso. Easy to install and will save you 200 to 350 bucks if you buy here and install it yourself. The whole install took me 20 to 25 minutes. Super easy. Look up videos on YouTube.. Solved the problem. If your check engine light comes on, take your car to AutoZone or someplace like that, and they will hook your car up for free to see what the problem is. This part is in the case that code P0134 comes up. The part is actually an air fuel sensor, though it will commonly and mistakenly be called an oxygen sensor. This is what they call the "upstream" sensor, which is the sensor that is in between your engine and the catalytic converter. There is a "downstream" sensor that is further down the exhaust pipe. That is a different part. Your catalytic converter is the place in the pipe just behind the front tires that is wider than the rest of the pipe and almost looks like a mini muffler.

Used this on a 04 Honda Civic EX and it worked great, fit perfect. A lot of the other reviews said that they drove about 20 miles before the "ck engine light" cleared, probably enough to get the engine temp up to normal. My experience didn't work that nice. I drove 50 miles, light still didn't clear. Finally gave up, went to a store for about 20 minutes, when started again the light had cleared. Don't know what the problem was, but glad it finally worked. NOTE: Do not use a deep well socket with slot on side (Tekton 4929 3/8-inch drive by 7/8, shown as frequently bought with this item). I used a 7/8" crowsfoot flarenut wrench and it worked fine. By the way, it gets 4 stars as there is no warranty for this item. Hopefully it will last for awhile.

Denso the only brand that will clear the code

This is what you need to get your 05 civic to run right. Do not get o2 sensor!!!

I bought this because my 2005 Honda Civic Ex was throwing a P0135 code. After going to many car part shops they all told me it was an O2 sensor but when I bought one, it didn't match what was in my car. That lead me to this part which was the correct upstream sensor. Took me about 20 minutes to install and after about an hour of driving my check engine light has not come back. Also my car seems to idle a lot better. I have heard some people not getting the part in a box. Mine came in a Denson box with a part label on one end. If yours does not I would recommend returning it.

Muy buen producto, de excelente calidad y llego antes de tiempo

Cleared the code on my Honda. Honda is fussy. DENSO fixed that!! Amazon rocks on the delivery

This is the OEM upstream oxygen sensor for 2005 Civic EX and Acura EL.My vehicle was intermittently throwing the code: P0134 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) so I went to the local Honda dealer to get a quote. They wanted $400 for the part alone so I did some research and found that Denso is the OEM manufacturer of the sensor and luckily found it on here a lot cheaper.The location of the sensor on the exhaust is awkward to access but have not had any issues after replacing it.

I purchased and installed this Denso Air Fuel Ratio Sensor on my 2005 Acura EL (Honda Civic EX in the US). The replacement is as simple as it gets it will save you $400-500 (vs dealer installed) and the part is OEM. I also purchased the Tekton 3/8 drive which makes the removal and installation very straight forward. I did the install over one year ago and have put over 20K on the vehicle since with no issues.

as a mechanic, i always trust denso as it is commonly the original manufacturer of oxygen sensors for most Japanese cars, tried others brands before and did not get good results esp the length before had to replace again.