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Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor

4.4 4.4 out of 5 stars 461 ratings

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Purchase options and add-ons

Brand Denso
Material Zirconium
Item Weight 0.01 Ounces
Style Modern
Mounting Type Flange Mount

About this item

  • Manufactured to detect the amount of exhaust gas air fuel ratio.Material:Zirconium
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate; Thread Diameter: 18mm
  • Easy installation
See more product details

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$106.60
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Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor
Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor
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Price-43% $106.60
List:$185.71
$39.99$39.99$6.99-25% $131.26
List:$175.77
-26% $45.18
List:$61.10
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Easy to install
4.4
4.4
3.9
4.3
4.6
Value for money
4.3
3.5
4.0
4.5
4.5
Mileage
4.3
4.0
3.7
4.1
4.9
Sold By
Amazon.com
DrCax Store
lzskautoparts
YOGEIER
Amazon.com
Amazon.com
specific uses
Oxygen Sensor
Oxygen Sensor
Molybdenum
Oxygen Sensor
Oxygen Sensor
material
Zirconium
Steel
Zirconium
Zirconium
mounting type
Flange Mount
Flange Mount
Flange Mount
Threaded
Threaded
style
Modern
Modern
Modern
Compact
Modern
Modern
weight
0.01 ounces
0.27 pounds
0.11 kilograms

WARNING:

CHOKING HAZARD -- WARNING: This product contains small magnets. Swallowed magnets can stick together across intestines causing serious infections and death. Seek immediate medical attention if magnets are swallowed or inhaled.

From the manufacturer

About us

DENSO is a global company focused on advanced mobility that positively changes how the world moves and contributes to greater well-being. As a global Fortune 500 company, we have a broad product portfolio and widespread global impact. We are focused on the development of core technologies in four fields to create new value and influence the future of mobility. DENSO's network spans across 35 countries and regions allowing us to share diverse perspectives and opinions to deliver global and regional solutions to meet societal needs.The DENSO brand is built on delivering more Quality and Reliability. Whether supplying the world’s automakers with reliable OE parts, or developing aftermarket, DENSO’s line of products are built to deliver superior all-around performance every day. At DENSO we’ve taken everything we have learned as an OE manufacturer and applied it to our aftermarket product lines. Every component that leaves our factories has been designed with precision, manufactured to OE standards. At DENSO, we’re constantly striving to break new ground with innovative solutions for today’s demanding automotive needs. All of our products are built to OE-standards and incorporate the upgrades — an OE manufacturer can make. DENSO First Time Fit products are manufactured to give you the right part and the right fit … the first time, every time.

Product Description

Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor


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What's in the box

  • Oxygen Sensor
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.4 out of 5 stars
    4.4 out of 5
    461 global ratings

    Customers say

    Customers like the performance, value, ease of installation, quality and fit of the electronic sensor. For example, they mention it works great, it saves them a heap of cash and that it fits perfectly. Opinions are mixed on the anti seize.

    AI-generated from the text of customer reviews

    35 customers mention30 positive5 negative

    Customers like the performance of the electronic sensor. They say it works great, flawless, and has no issues. Some say it runs better than ever and has a good response.

    "its fits perfectly and working as expected. No errors anymore. Thank you." Read more

    "...and replaced the one after the cat and wouldn't ya know..... Runs better than ever...." Read more

    "I love the sensor works great. Will recommend" Read more

    "...Not only was I right in my assumption, I was shocked at the performance gain...." Read more

    26 customers mention26 positive0 negative

    Customers appreciate the value of the electronic sensor. They mention that it is a great product and a good buy.

    "Great Oxygen Sensor with a Great Price" Read more

    "...Glad to get OEM quality parts at an affordable price." Read more

    "Love the price, saved $80.00 compared to a local parts store. Does the job, cleared the code and all is good." Read more

    "...Of course, I found it here for a decent price. It works exactly like it's supposed to work." Read more

    19 customers mention19 positive0 negative

    Customers find the installation of the electronic sensor fairly easy. They mention that it came with anti-seize and installs very nice. Some say that it took 15 minutes and was done. It's really one of the easiest maintenance jobs you can perform on your own vehicle. Some mention that the difficulty level is zero and that it did not require any splicing.

    "...due to the very limited space in the engine bay, but the install was relatively easy...." Read more

    "...Not very easy but not that hard to install. Might have to stand on your head. Used a 13/16 box end wrench to get off the old 1. Same to install...." Read more

    "Easy install" Read more

    "...easily removed and replaced if you use that short wrench. the sensor comes with anti seize already on it so you don't have to do that either." Read more

    19 customers mention16 positive3 negative

    Customers like the quality of the electronic sensor. They mention it's a great OEM replacement and still going strong. Some say it'll fit their Lexus IS250 AWD.

    "...It also looks to be good OEM-like quality. I've put 500-600 miles on since the replacement and haven't had any issues...." Read more

    "Denso quality is very important as this sensor determines and sets the correct fuel mixture , Your records will indicate that two attempts have..." Read more

    "Great replacement" Read more

    "...Great part!" Read more

    15 customers mention13 positive2 negative

    Customers like the fit of the electronic sensor. They say it works flawlessly, is extremely tight, and locks in tight. Some have been running it fit for over a year.

    "its fits perfectly and working as expected. No errors anymore. Thank you." Read more

    "Perfect fit and accuracy" Read more

    "...Fuel trimming as read from my scan tool is extremely tight, and the 4.7 is running good as new at 241k miles. Great part!" Read more

    "Denso all the way, this is the same as Toyota Lexus OEM. Fit perfect and worked flawless on 2007 Lexus GS350...." Read more

    6 customers mention6 positive0 negative

    Customers are satisfied with the gas consumption of the electronic sensor. They mention that the engine delivers the right performance, the gas mileage is much better, and the truck runs smoother.

    "...But it runs like a new truck again." Read more

    "...Truck runs much more smoother and consumes less gas. Very happy customer !..." Read more

    "...They really woke my truck back up it runs a lot smoother and i gained a half of a mile per gallon back." Read more

    "...Gas mileage much much better!" Read more

    6 customers mention3 positive3 negative

    Customers are mixed about the anti-seize of the electronic sensor. Some mention that it comes with anti- seize already on it, while others say that removing the old sensor was a challenge.

    "...the sensor comes with anti seize already on it so you don't have to do that either." Read more

    "...The hardest part is removing the old sensors. Take your time and use WD40 or similar to loosen the part." Read more

    "...It came with anti seize and installed very nice. I was able to install and clear codes on the truck and truck runs great...." Read more

    "...Removing old sensor was a challenge. Need to use a special socket that can be borrowed with a deposit from Autozone...." Read more

    High Quality Part!
    5 Stars
    High Quality Part!
    Installed this sensor on my 2007 Toyota Sequoia. It was throwing a P0051 code for Bank 2 sensor 1. Swapped it out with this OEM Denso sensor, and the code has been gone ever since. Fuel trimming as read from my scan tool is extremely tight, and the 4.7 is running good as new at 241k miles. Great part!
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    Top reviews from the United States

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    Top reviews from other countries

    Linh N.
    5.0 out of 5 stars Looks legit and works
    Reviewed in Canada on July 5, 2023
    Customer image
    Linh N.
    5.0 out of 5 stars Looks legit and works
    Reviewed in Canada on July 5, 2023
    Driver side upstream sensor went bad on my 07 gx470 so I managed to track down the part number and narrowed it down to this OEM part. Dealership wanted over $400 CAD for the part so there's massive savings to be had. Part came in a legit looking box and anti-seize pre applied. Car runs with no issues now so I highly recommend it!
    Images in this review
    Customer image
    Customer image
    angus
    5.0 out of 5 stars Works great
    Reviewed in Canada on May 15, 2022
    Paul Difant
    5.0 out of 5 stars DENSO oxygen sensor
    Reviewed in Canada on January 25, 2023
    LOW ORBIT
    5.0 out of 5 stars Genuine Denso part!!!
    Reviewed in Canada on June 21, 2023
    Customer image
    LOW ORBIT
    5.0 out of 5 stars Genuine Denso part!!!
    Reviewed in Canada on June 21, 2023
    Received the sensor today! Ordered part yesterday. Super fast shipping. It appears to be 100% genuine Denso part. Sensor identification markings are laser etched (not engraved). Buy with confidence. Appreciate all the responses I received to my posted question. You are all correct! Genuine Denso part. ✌🏻
    Images in this review
    Customer image
    Customer image
    Adam Joonase
    5.0 out of 5 stars Grand quality as always from denso
    Reviewed in Canada on October 3, 2020