Denso 02-04 RSX / 02-05 Civic Si Primary O2 Sensor Reviews

Got it quick and installed no more cel for the upstream saved me a lot of money.

Can

This product worked great and was a better price than the competition

Fits fine in my magnaflow catalytic converter,definitely recommend

direct oem fit and part. next to impossible to find at an affordable price but k series had it, got it within days and installed.

Plug and play with the 05-06 RSX running kpro

Got say that by replacing the wornout O2 sensor, it made a bit of difference on gas mileage.

No more check engine light , great delivery time too.

Good quality and fast delivery little expensive

Cleared my CEL light.works so far,as it should. Great product thus far

As described and great fitment. Replace with this product and no more code and engine running smooth with much better gas mileage. Worth the price. Thank you!

Installed on a 2002 rsx type s,fitment was great,quick shipping great price.Saved big $$$$ compared to dealer price

Installed on my 2004 civic si ep3 after diagnosting it had a bad 02 sensor, CEL came off right after install. Car feels a lot more smoother at idle , gas mileage got a bit better, definitely worth the $$, Kseriesparts has the best deals and I will definitely continue to buy from them

CEL light would turn on. And my rpm would go too low when car @ stop. Just a littl push of gas and it would stall. It would go away when i open the fuel cap. But withing few days it would come back on. Eventually after a few months. It just stayed on. After getting a free read @ local autoparts & from reading @ few forums. Idecided to replace this sensor. Its pretty easy just raise the car from passenger side high enough.Took off the side skirt to make it a little easier. Having the O2 sensor rem. socket also helps but not necessary. Car runs great now. Super fast shipping!

needed it because my primary o2 was going bad and after the installation it fixed my CEL.

had CEL put this in and no CEL

my car rpms would near drop to 100 on red lights and almost stall. This sensor fixed everything and p1167 and p1166 went away, and my car runs a lot more efficiently and faster.

Ordered a Kpro for my 2006 Acura RSX-S , this is a must have for any 05-06 RSX-S when using Kpro! Fast shipping, good quality, works great!

Had the CEL for like two years and finally needed this sensor to clear emissions. Worked like a charm. Whatever they do over there at Kseries works, because they always have super fast shipping.

This was the same sensor I pulled out of my car quality was great and it even had the extesion to fit my ep3 swap . Price is also better than anyone elses after i shoped around

A necessity for upgraded modifications. Perfect fit and works well. K-Series customrr service is one of the Best!

perfect fit, fast shipping. check engine lights gone. definitely worth the money dont bother with the cheap ones.

Both parts came quickly and were as i ordered.

Check engine light was on for more than a year now and as soon as I got it put it on and cleared the codes and like magic that yellow engine was gone :)

got this the other day installed it and then cleared the code and it hasnt been back since!!!!!!! GOODBYE CEL!!!!!!!!

easy installation part came in super fast very satisfied customer! thanks k series parts!!

It was easy to install and the check engine light went off after i disconnected my battery and reconnected it. The removal of the stock 02 sensor can give you a lot of trouble. Great product for a great price.

I finally broke down and jumped on this O2 sensor due to the price. ClubRSX has this at my door BEFORE expected and it cleared my CEL. Awesome OEM part and EXCELLENT customer service from CRSX.

Turn that damn CEL off thanx.

Turned my engine light off.

Product came in fast, and works great! Now getting the mileage I should.

Plug and play, works great.

This part is just what I needed and at the perfect price! Couldn't find a cheaper part anywhere and I even work for Honda! The O2 sensor was shipped fast and I received it just a couple days after placing the order. Definitely recommend ClubRSX and this part. I will never purchase another part anywhere else.

Had DTC P1166/P1167. Cleared MIL and installed O2 sensor. Works great!! Good price and super fast shipping!!!

Identical replacement. PITA to take off the old one. Five minutes to attach the new one. Code goes away, engine runs smoother, mileage goes up slightly.

Fast delivery, replace'd old o2, works perfectly fine with my 05-s kpro'd. Simply does it's job

Great product!!! CEL code is gone for good. No check engine light!!! Easy 5 minute install!!

great product!!!!!!!! car responds way better, gas mileage is way better and it took out my check engine light!!! thanks crsx!

Just installed last week and pairs perfectly with the Kpro system on my 06 RSX. Had no problems on install or daily driving. Works Great!!

This product is amazing. Point blank.

Code went away and car runs much better! Very easy to change too.

Great item!!! Fast shipping!!! Works great!!! Thank you!!!

Ordered this when my primary O2 sensor went out, only took 20 minutes to install. Make sure you get the O2 sensor removal tool! Car has been running great since the replacement. :)

Fast shipping, worked great, great price.

replaced the sensor with ease... but after i tried to clear the codes it showed i now need the secondary one too. California smog laws suck. good product though still.

It works fine as a replacement at first installation. Don't know how long it would last so I cannot rate full.

After receiving the dreaded 'check engine light' I checked the codes with a code reader. They were two related to the secondary O2 sensor - slow or no response; heater failure. Replaced the sensor (make sure you get the tool from Autozone to get it out of the cat easily, it's in a recessed area, but you can see where the wires head in near the engine side of the cat) and the codes are gone. Be careful when you hook the wiring back up, mine came loose and had to be reconnected a second time. Whoops! The sensor seems fine (I mean, it is the original equipment) and the original lasted from 2003 to late 2009, 6 years ain't bad I guess.

THE SENSOR WORK WELL ON MY VEHICLE AND IT TOOK CARE OF THE RPM NEEDLE FROM GOING UP AND DOWN.

A trip to Advance Auto to get the codes, diagnosed cel w/ dealer manual found online. Took a few evenings to diagnose with a multi since I'm a novice. But, took 20 min to remove old sensor and drop in this one in a parking lot with a "curb hop". Saved a few hundred by avoiding dealer/mechanic on this one.

Can't beat the price, mine went out when I installed the OBX (v2) Raceheader on my EP3 and the o2 CEL code went out immediately. The extra length (for it being made for the RSX) gave it some slack as well :P Thanks a ton CRSX!!!

Priced well, was easy to install. Fixed the problem I had, the light didn't come back on.

quick shipment on this item... pretty easy to install with the appropriate 02 sensor removal tool

Sup guys this sensor is at a good price so don't look anywhere else. Had the check engine light on on my K20A2 and this sensor was the solution to codes P1166 and P1167. See u in the forums.

I got a cel as soon as i installed my raceheader, te primary was bad. Bought this sensor, it was at the best price i could find. The light has never come back!

I was looking for this sensor and this was the lowest price I found from a legit site.

Had no problems at all installing this sensor and it works great.

The 02 sensor was a great price, came in quick, and was a direct replacement so really, I couldn't ask for anything more except: CRSX may want to offer an 02 removal socket so those who don't have one could get them at the same time. US 02 sensor sockets are easy to come by, but it's harder to find the correct metric one in the typical Autozone type stores.

I looked around for a replacement primary sensor and either none were available or they were too much $. Trust me, buy it here, the price is the best you will find, shipping was ultra fast (3 days to get to Massachusetts) and clubrsx is easy to work with. I shopped around for a while trying to find a better deal and it was just a waste of time. Other than that, the sensor works perfect. I've put a little over 2k on my car since installing the sensor and the CEL hasn't even blinked once at me. The engine runs smooth again and my gas mileage is back where it should be.

I have a base auto, and figured I would try out this sensor, since the one for the base auto was back ordered. I am happy to say it works great! fitment is good, the connectors are the correct length, and best of all my gas mileage doesn't suck anymore!

Great working quality sensor and the best price ever!!!

Great product

Great product direct fit no cutting or splicing. Save yourself the headache buy this if you are looking for a primary o2 sensor for your dc5

My Primary 02 sensor went bad not too long ago. I ordered this one through club rsx and received and installed in less then a few days. Easy install on my race header. Simple unplug and replug. CEL is gone and my gas mileage has gone up a good bit. I recommend Denso.

I got a CEL and determined that I needed to replace the Primary O2 sensor. Like others here I first tried to order from a couple of online stores that claimed to have it in stock but actually didn't. In fact, one tried to sell me a more expensive off-brand sensor after taking my original order. I canceled those orders and found it here at Clubrsx--for a better price to boot. Installation was easy with the right tools and my CEL is gone.

i got this about a month ago easy install and has worked great ever since!!!!

I originally tried to buy the same o2 sensor from some other site but they let me order without telling me that they were out of that part until the next month! So I canceled my order with them and got this part from ClubRsx and the whole process was seamless. The sensor works as it should: got rid of my CEL and it seems that I have better gas mileage now than even before the CEL came on. If you have a part you need and you find it here on ClubRsx, don't waste time and just get it!

Perfect Fit, easy to install. My gas millage is decent once again, no more strong gasoline odor when warming the engine in the mornings. Fast shipping and easy purchase from Club RSX

The O2 sensor took away my CEL, and now im getting better gas mileage again, it doesn't smell like sulfur, and on startup, i don't smell gasoline anymore. So it is worth it replacing it, and no procrastinating.

Well it was worth the 180.00 to purchase a non used o2 sensor. Easy, Direct, a little tug but that that's about it. And the offset socket and wrench to wich i purchased at a local autoparts store made it reallly simple. I am having better gas mileage, shifting and throttle response is great. And yes it was cheaper than everywhere else especially being by DENSO.

This was a perfect fit for my 02 RSX-S. Took only about 5 minutes to change (make sure you have an offset-style O2 sensor socket). Great replacement item for an engine with 100k+ miles on it. Engine is smoother, slightly more torque and (perhaps most importantly these days) gas mileage is back up to 30-32 mpg.

What can I say, it works perfectly!