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Denso 234-4739 Oxygen Sensor

4.8 out of 5 stars 20 customer reviews
| 3 answered questions

Price: $38.19 & FREE Shipping on orders over $49. Details
Only 5 left in stock (more on the way).
Ships from and sold by Amazon.com.
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  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
57 new from $38.00 1 refurbished from $31.95
Note: Denso partners with other manufacturers to supply the parts your car was originally built with. This product is in a Denso package, however the part may have been manufactured by an independent Denso supplier.
$38.19 & FREE Shipping on orders over $49. Details Only 5 left in stock (more on the way). Ships from and sold by Amazon.com.

Frequently Bought Together

  • Denso 234-4739 Oxygen Sensor
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Total price: $109.03
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Product Information

Technical Details

Brand Denso
Item Weight 4.8 ounces
Product Dimensions 6.8 x 2.1 x 2 inches
Item model number 234-4739
Exterior Ready To Paint
Manufacturer Part Number 234-4739
OEM Part Number 234-4739
Folding No

Additional Information

ASIN B000C5SGE0
Customer Reviews
4.8 out of 5 stars 20 customer reviews

4.8 out of 5 stars
Best Sellers Rank #94,634 in Automotive (See top 100)
#333 in Automotive > Replacement Parts > Sensors > Oxygen
Shipping Weight 4.8 ounces (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available October 10, 2007

Warranty & Support

Warranty, Parts:PartsWarranty, Labor:Denso honors the manufacturer's warranties for the products purchased from Denso. Please note that shipping charges for all warranty items are the responsibility of the customer. Parts that are damaged due to incorrect installation or mistreatment are not covered under warranty. Denso does not express or imply any warranty as to the performance of any part sold. Denso is not liable for damages of any kind arising from incorrect part application. Denso is not liable for the use of parts purchased on this site, including but not limited to punitive, indirect, direct, incidental, and consequential damages.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Product Description

Denso Oxygen Sensor is designed to detect the amount of oxygen in the exhaust stream. It is constructed from high quality stainless steel, porous polytetrafluoroethylene, fluorine rubber, aluminum oxide, high-grade platinum and ceramics. This Sensor features double protection layer, aluminum oxide trap layer, porous PTFE filter and stainless steel housing. It is manufactured with precision to meet OE standards. This oxygen sensor can be installed easily and ensures longevity.

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
Disclaimer: I'm not a mechanic, so this review turned out to be more about my experience in replacing an O2 sensor for the first time than the product itself. I will say that I installed and have been driving with this sensor for over a year now with no issues.

When my Lancer's check engine light came on, the first shop I went to was all booked up but offered to read the code for me. It was the O2 sensor. I shopped around and was quoted anywhere from $130-$400 to replace it.

For $80 on Amazon I was able to buy this, an ODB II reader which I can continue to use for future repairs, and the proper wrench to do the repair myself. I spent 10 minutes watching a tutorial on YouTube and about a half hour performing the repair. The old sensor was burnt and visibly worn, and the part number was different from the OEM part (although still Denso) but it fit perfectly and performs as expected.

I'm the farthest thing from a mechanic, but this is one of those easy repairs that will save you a ton of cash. I highly recommend doing so if you're on the fence about it.
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Verified Purchase
Check engine light was on, diagnosis was the upstream O2 sensor was bad. Ordered this, shipping was super fast and awesome. Old part was out and this one was in in less than 10 minutes. Driving it around for about a day got the check engine light to go out and the car passed inspection!

You will want to buy the special socket for replacing O2 sensors. It's basically a deepwell socket with a slot in one side so you can slide it down onto the part with the wire through the slot. I tried to remove the old one from the car using just a wrench but there was not enough room. Mechanics wanted $150 to do this job - don't let them. You can do this.
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Verified Purchase
Bought this to replace faulty sensor (check engine light came on, code checked). Amazon has a very competitive price and this brand is very good for the lancer (after some research on the web, many lancer owners opt for denso). It fit perfectly, enough wire to reach connection. Has been working great, code disappeared.
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Verified Purchase
Came with compound to prevent locking. Replaced front oxygen sensor on a 2003 Mitsubishi Lancer OZ Rally. Diagnostic light turned off after resetting battery, performance improved. Much, much cheaper for this and an O2 socket than the $350+ estimated by dealership.
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Verified Purchase
The sticker on the box had the right product number, but the bag inside had a different part number and the item was not compatible with my car.

I REORDERED THIS ITEM TWICE MORE AND BOTH TIMES IT WAS THE WRONG PRODUCT.

Save your time and money. Buy this part at your local store if you can.
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Verified Purchase
perfect, no hassle, direct replacement for the original part that came on the car. costs about half of what you'd pay at the auto parts store for this exact part.
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Verified Purchase
Great fix for the car, went in easy with the right tools. The price beat everyone's else and shipping was free. What more could you ask for.
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Verified Purchase
.I had to fit the original wire connector as the supplied one was different,dont know how.Works fine no problems.
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