Denso 234-4209 Universal Oxygen Sensor (Air and Fuel Ratio Sensor)

by Denso

Product Features

• Manufactured to the highest O.E. quality, guaranteed to fit right
• Aluminum oxide trap, this extra layer helps to protect from silicone and lead poisoning
• Stainless steel housing and porous Teflon filter all contribute to make a long life
• Improved engine performance and greater fuel efficiency
• Prevents premature sensor failure

Product Details

• Item Weight: 4.2 ounces
• Shipping Weight: 4.8 ounces (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000C5WCUE
• Item model number: 2344209
• Average Customer Review: 4.4 out of 5 stars  See all reviews (39 customer reviews)
• Amazon Best Sellers Rank: #2,538 in Automotive (See Top 100 in Automotive)
  • #8 in Automotive > Replacement Parts > Sensors > Oxygen

Product Description

Denso Universal Oxygen Sensor is designed with precision, manufactured to the highest O.E. quality, guaranteed to fit right the first time. This oxygen sensor is of superior quality and will outlast most other oxygen sensors. Constructed with exclusive aluminum oxide trap, this extra layer helps to protect from silicone and lead poisoning which causes premature sensor failure. This combined with other Denso high quality features such as stainless steel housing and porous Teflon filter all contribute to make a long life oxygen sensor with improved engine performance and greater fuel efficiency.

Customer Reviews

Most Helpful Customer Reviews

10 of 10 people found the following review helpful:

5.0 out of 5 stars Near-perfect replacement, October 27, 2009

By 

G. Forster (Atlanta, GA) - See all my reviews
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Amazon Verified Purchase

This review is from: Denso 234-4209 Universal Oxygen Sensor (Air and Fuel Ratio Sensor) (Automotive)

After removing the original sensor that had failed, I installed this one, using the original wiring/plug. The wiring for the original one seemed a little short, so I installed this one with 1" more cable - you can't do that with the OEM replacement.

I chose the Denso over other brands, because that is what the original was. The sensor body is identical to what was removed.

This was a fraction of the cost of a ready-to-install sensor, but it was well worth the effort to do a little work.

The only criticism is that the shrink-tubing provided to seal the splices seemed to take longer than I expected to shrink down. I used a Bic lighter, as I have done with other shrink tubing. It just seems like it took a long time to tighten up.

It's been in a month now, and seems to be working just fine.

A note when measuring to cut the original wiring: be sure to mark where all of the ties and clips are, where the harness is attached along its length. If you put the splices where the wiring should be bending, or at a clip, it may not bend smoothly.

7 of 7 people found the following review helpful:

3.0 out of 5 stars Didn't work for me, May 29, 2011

By 

W. Prince "wprince2" (Kennesaw, GA United States) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Denso 234-4209 Universal Oxygen Sensor (Air and Fuel Ratio Sensor) (Automotive)

I bought this universal oxygen sensor to replace the rear one that was mounted on the catalytic converter on my 2000 Honda Civic Si. I bought the universal to save about $70 or so over the "exact fit" replacement. But looking back on it now, I wish I had just spent the extra money for the "exact fit" version. To use this universal unit, you must reuse the electrical connector (leaving a length of wire attached) from you old sensor. It comes with crimp connectors so that you can splice the wires together, but I didn't have a wire crimping tool, so I soldered the wires together with a 25 watt iron utilizing the solder holes found on the crimping connectors. Everything appeared to look good, but after installation the new sensor was reporting a constant 1.28 volts and my car's computer threw a code P0138 (too high a voltage). I'm ASSUMING that the heat from my soldering job caused a short somewhere in the sensor itself or in the old connector. Of course I cannot return the sensor back to Amazon and I needed my car now, so I purchased an "exact fit" Bosch unit, from my local auto parts store, and it works perfectly.
Based from my experience and money and time lost, my caveat if you buy one of these is to crimp (as instructed) and don't solder the wires together. Or buy the "exact fit" unit for the extra $70 or so. I did install another Denso oxygen sensor, an "exact fit" (no crimping) unit to replace the front unit, and that one works fine. Also, the Bosch sensor seems to perform well too even though it does not look exactly like the Denso (Honda OEM) part it replaced.

4 of 4 people found the following review helpful:

5.0 out of 5 stars Best O2 at Best Price Around, December 17, 2008

By 

Wil (Gambrills, MD) - See all my reviews

Amazon Verified Purchase

This review is from: Denso 234-4209 Universal Oxygen Sensor (Air and Fuel Ratio Sensor) (Automotive)

I still have yet to find a cheaper place to buy a 4-wire denso O2 sensor than here at Amazon. I never thought I'd be buying car parts on here, but if they want to sell it, I'm happy to buy it.

I replaced my Celicas sensor with this universal one in about 15 minutes using a socket I already had. The check engine light I had previously has disappeared & my fuel economy slightly improved. This is the same brand that most japanese manufacturers use as OEM equipment, such as Mazda, Toyota, Nissan. I've used Bosch universals in the past & this one is equivalent, but less expensive than the Bosch 4-wire counterparts.