Manufacturer | Denso |
---|---|
Brand | Denso |
Model | Fuel Sensor |
Item Weight | 4.2 ounces |
Country of Origin | China |
Item model number | 234-9002 |
Is Discontinued By Manufacturer | No |
Exterior | Machined |
Manufacturer Part Number | 234-9002 |
OEM Part Number | 234-9002 |
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To see product details, add this item to your cart.
FREE Returns
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns. How to return the item? - Go to your orders and start the return
- Select the return method
- Ship it!
Ships from: Amazon Sold by: Amazon Warehouse
Denso 234-9002 Air Fuel Ratio Sensor
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | Denso |
Material | Zirconium |
Item Weight | 0.26 Pounds |
Style | Durable |
Mounting Type | Flange Mount |
About this item
- Efficient Fuel Consumption.Material:Zirconium
- Highly accurate
- Easy installation
- Constructed from durable material
Frequently bought together
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This Item Denso 234-9002 Air Fuel Ratio Sensor | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | -26% $152.45$152.45 List: $204.95 | -31% $96.21$96.21 List: $138.57 | $36.99$36.99 | $56.99$56.99 | $76.16$76.16 | $6.99$6.99 |
Delivery | Get it as soon as Tuesday, Mar 26 | Get it as soon as Tuesday, Mar 26 | Get it as soon as Tuesday, Mar 26 | Get it as soon as Tuesday, Mar 26 | Get it as soon as Tuesday, Mar 26 | Get it as soon as Tuesday, Mar 26 |
Customer Ratings | ||||||
Easy to install | 4.7 | 4.5 | 4.1 | — | — | 3.9 |
Mileage | 4.4 | 4.6 | 3.1 | — | — | 3.7 |
Value for money | 4.4 | 4.5 | 3.5 | — | — | 3.9 |
Sold By | Amazon.com | Amazon.com | Marsflex | BATU | Water Drop Store | YOGEIER |
specific uses | — | Oxygen Sensor | — | Oxygen Sensor | Oxygen Sensor | Molybdenum |
material | Zirconium | Zirconium | — | — | leather | Steel |
mounting type | Flange Mount | Threaded | Flange Mount | — | Flange Mount | Flange Mount |
style | Durable | Modern | Upstream | Modern | 2 pc o2 sensors | Compact |
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WARNING:
From the manufacturer
About Us
Our parent company, Monarch Products, is a family business started in 1969 by Jim Gambill, selling motorcycle and garage accessories.
Over time and with much dedication, Jim grew the motorcycle accessory division, and in 1980, added automotive product lines.
Product Description
Denso 234-9002 Air Fuel Ratio Sensor
Product information
Technical Details
Additional Information
ASIN | B000C5YCYS |
---|---|
Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #189,556 in Automotive (See Top 100 in Automotive) #777 in Automotive Replacement Oxygen Sensors |
Date First Available | January 2, 2007 |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the ease of installation, fit, value, and check engine light of the electronic sensor. For example, they mention it's easy to install, fits perfectly, and is built exactly to Toyota specs. Some are happy with responsiveness, and ease of changing. That said, opinions are mixed on quality.
AI-generated from the text of customer reviews
Customers find the installation of the electronic sensor to be easy. They mention that there is no need to assemble the sensor, it installs far easier than expected, and no special tools are needed. Some mention that the sensor works great and comes with installation installation.
"The sensor was an exact fit for my 2001 4runner. Good quality and easy installation." Read more
"Product appears to be exactly the same as OEM, installation was easy and resolved my P1135 air fuel ratio code...." Read more
"Purchased cheaper one online and never worked, this O2 sensor was simple install and engine light is off. I recommend this product" Read more
"...my mechanic but this seemed like an easy enough fix and no special tools were needed...." Read more
Customers are satisfied with the fit of the electronic sensor. They mention that it fits perfectly and is built exactly to Toyota specs.
"The sensor was an exact fit for my 2001 4runner. Good quality and easy installation." Read more
"...They are built EXACTLY to Toyota specs. The Toyota ECU is looking for VERY SPECIFIC DATA from these sensors...." Read more
"Arrived very quickly! Product fit perfectly on my 2001 Toyota 4 Runner SR5 4-wheel drive. My check engine and VSC lights had been going off..." Read more
"...It fit perfectly including correct electrical fitting and wire length...." Read more
Customers appreciate the value of the electronic sensor. They say it is the right product at an excellent price and worth the extra cash. Some say it's easy to install and saves hundreds of dollars versus having a mechanic install it.
"...than standard 2 day prime, but still came quickly and the price was excellent. Product appeared identical to the original...." Read more
"Exactly what I needed and at a cheaper price then the brick and mortar options...." Read more
"Fair price 👌 and on time......" Read more
"Good price for quality Denso OEM product replacment 02 sensor" Read more
Customers like the check engine light sensor. They say it works perfectly and resolves their check engine or VSC light.
"...online and never worked, this O2 sensor was simple install and engine light is off. I recommend this product" Read more
"...This Denso 234-9002 sensor fit my 4Runner perfectly and the check engine light is out. You won't be disappointed if you purchase it from Amazon." Read more
"...Check Engine light is now out. Took 15-20 minutes to install on my 2001 4Runner SR5." Read more
"Worked exactly as it should. Check engine light is out." Read more
Customers are satisfied with the responsiveness of the electronic sensor. They mention that it clears codes and the engine runs smooth. Some say that the sensor improves how their vehicle runs and that it helps with MPG and throttle response.
"...I then drove about 15 miles, and then tested it again. No codes came up! The next test was the smog check, which I passed easily...." Read more
"...Now, I can see a difference right away with the responsiveness and a better MPG...." Read more
"...Installed the new gasket and tighten to specs.So far so good, no code or CEL yet after 1000 miles." Read more
"...I replaced it with little difficulty and the code is clear and the truck is running great." Read more
Customers find the electronic sensor easy to replace. They mention that it takes almost no time to replace the old sensor. Some customers also say that the sensor can be easily replaced with two screws and a plug.
"...It was very easy to swap out the old sensor and replace it with this one. Saved a few hundred dollars doing it myself...." Read more
"Perfect fit, comes with gasket. Easy part to replace for nearly anyone with a 12mm wrench...." Read more
"Denso is always great on my toyotas. They only last about 80k. Easy to change on my 1999 4Runner v6...." Read more
"...The sensor was a breeze to replace and the CEL cleared right away once I was done. Very happy with this purchase." Read more
Customers are mixed about the quality of the electronic sensor. Some mention it's a quality product, while others say that it was defective.
"The sensor was an exact fit for my 2001 4runner. Good quality and easy installation." Read more
"...My sensor bolts were in great condition with no corrosion so I did not bother replacing them as some people suggest...." Read more
"...The Sensor internal heater circuit is NOT repairable, so unless you have a short in your wiring leading to the sensor, a replacement O2 Sensor is..." Read more
"...Installation was easy. Part was GREAT, definately buy it and save yourself some money from the dealer $$$$!" Read more
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I recently got a CHECK ENGINE amber light. I attached my OBDII Diagnostic Reader/Scanner device which I purchased on Amazon a few years ago and discovered a P0135 code. This indicates a fault in the Air Fuel Sensor (aka, O2 Sensor…used interchangeably), Bank 1, Sensor 1, and more specifically, a fault in the forward Air Fuel Sensor Heater Circuit. The Toyota ECU expects to see the Air Fuel Sensor electrically heated to a pre-determined temperature in a specified period of time after start, or it will send a P0135 code.
There are two O2 sensors on my Tacoma (four on some of the Toyota V8’s), one located immediately before the catalytic convertor and one immediately behind it. “Bank 1” is the forward of the two O2 sensors. The Sensor internal heater circuit is NOT repairable, so unless you have a short in your wiring leading to the sensor, a replacement O2 Sensor is in order if you’ve received the P0135 OBDII diagnostic code.
Denso is the OEM manufacturer for the Toyota Air Fuel sensors. They are built EXACTLY to Toyota specs. The Toyota ECU is looking for VERY SPECIFIC DATA from these sensors. While some of the after market Chinese air fuel sensors offered on Amazon are less expensive, they may not meet specific Toyota ECU specs and will trip a CHECK ENGINE amber light regardless of their age. Accordingly, I recommend the Denso OEM Air Fuel Sensors to avoid any of these issues. When ordering the Denso Air Fuel Sensor on Amazon make absolutely sure you list ALL your vehicle details…model year, specific model type, specific engine size, manual or automatic transmission, etc. as the sensors vary in design based upon each of the preceding. You can check the Denso web site to cross reference what Amazon is showing as the correct part for additional peace of mind.
Removing the old part and installing the new one doesn’t require a great deal of mechanical expertise. Your Toyota dealer will quote $350-$400 for parts and labor to complete the job. You can do it for the cost of the Denso OEM part on Amazon and your willingness to climb under your truck.
The tools recommended for the job are:
1. 12mm socket
2. 12mm open end wrench
3. 10mm socket
4. 10mm open end wrench
5. socket wrench
6. small flat head screwdriver
7. diagonal cutters
8. Zip-tie
9. Heat resistant anti-seize compound
Toyota is notorious for their positive-locking electric connections, and this part is no exception. The electrical connector has a tiny locking tab located on the side of the connector which must be released to separate the male and female ends. More on that later.
Here’s what I recommend to complete the process:
1. Remove the electrical connector metal support bracket to allow easy access to the electrical connection. Use diagonal cutters to cut any retaining parts for the electrical cable. Use a 10mm socket and/or 10mm open end wrench to do this. It’s tight quarters…very tedious…one click at a time. BUT…it’s the only way you can truly obtain access/purchase to remove the electrical connection. This is the “easy” part…reattaching the bracket later is THE most difficult part of this entire job.
2. Remove the old O2 sensor from the exhaust pipe. I used both an open end 12mm wrench and 12mm socket. If the bolts are rusted use your favorite penetrating oil. I applied this a day before I did the job.
3. Separate the electrical connection. ****Here’s the trick to removing an infamous Toyota electrical connection: use a small flat head screwdriver to drive under the plastic locking clamp on the SHORTER SIDE of the electrical connector to move it up and off the plastic locking tab.**** If you do this you can easily pull the connector apart using you fingers.
4. Install the new Air Fuel sensor. I began with the electrical connector. Push the male sensor connector on to the female connector attached to your vehicle. There are two ribs on the side of the connector to ensure you get this aligned correctly. You’ll hear a “snap” as the parts mate and the locking tab secures the two parts.
5. Coat the 12mm studs with anti-seize compound. Place the NEW gasket on the fitting…DO NOT re-use an old gasket. Denso includes a new gasket with each sensor part. Using caution not to get anti-seize compound on the new sensor, slide it over the studs. Hand tighten the 12mm nuts. Then ALTERNATE tightening each nut in SMALL INCREMENTS until you’ve reached the magical 14 foot-pounds of torque recommended in the Toyota shop manual. If you have any doubt regarding the cleanliness of the sensor…clean it with isopropyl alcohol before installation.
6. Now the HARD PART: reinstalling the electrical connection supporting bracket. This will be a tedious process. I initially aligned the bolt on the bracket and after MULTIPLE ATTEMPTS…finally got the bolt started. I hand-tightened it from there…and then used the 10mm socket. This process will test your patience…but you’ll eventually get it. Just think of the several hundred bucks you’ve saved to keep your sense of humor.
7. Install a zip-tie to secure the O2 sensor electrical lead to one of the metal automatic transmissions lines…or whatever your vehicle originally had in place to secure the lead.
8. Reset your OBDII to eliminate the P0135 code.
9. Drive your truck long enough to allow it to become fully heated to normal operating temperature. The Toyota ECU expects to see the Air Fuel Sensor electrically heated to a pre-determined temperature in a specified period of time after start, or it will send a P0135 code. If your vehicle is fully warmed up…and you don’t get a CHECK ENGINE amber light…congratulations…you fixed the problem! I always turn off the engine and ignition and re-start a few times just to be sure.
10. Politely apologize to your neighbors for any profanity they might’ve overheard during you many attempts to re-attach the electrical connection support bracket.
I’ve attached photos of the major aspects of the installation process. Good luck!
Reviewed in the United States on December 27, 2018
I recently got a CHECK ENGINE amber light. I attached my OBDII Diagnostic Reader/Scanner device which I purchased on Amazon a few years ago and discovered a P0135 code. This indicates a fault in the Air Fuel Sensor (aka, O2 Sensor…used interchangeably), Bank 1, Sensor 1, and more specifically, a fault in the forward Air Fuel Sensor Heater Circuit. The Toyota ECU expects to see the Air Fuel Sensor electrically heated to a pre-determined temperature in a specified period of time after start, or it will send a P0135 code.
There are two O2 sensors on my Tacoma (four on some of the Toyota V8’s), one located immediately before the catalytic convertor and one immediately behind it. “Bank 1” is the forward of the two O2 sensors. The Sensor internal heater circuit is NOT repairable, so unless you have a short in your wiring leading to the sensor, a replacement O2 Sensor is in order if you’ve received the P0135 OBDII diagnostic code.
Denso is the OEM manufacturer for the Toyota Air Fuel sensors. They are built EXACTLY to Toyota specs. The Toyota ECU is looking for VERY SPECIFIC DATA from these sensors. While some of the after market Chinese air fuel sensors offered on Amazon are less expensive, they may not meet specific Toyota ECU specs and will trip a CHECK ENGINE amber light regardless of their age. Accordingly, I recommend the Denso OEM Air Fuel Sensors to avoid any of these issues. When ordering the Denso Air Fuel Sensor on Amazon make absolutely sure you list ALL your vehicle details…model year, specific model type, specific engine size, manual or automatic transmission, etc. as the sensors vary in design based upon each of the preceding. You can check the Denso web site to cross reference what Amazon is showing as the correct part for additional peace of mind.
Removing the old part and installing the new one doesn’t require a great deal of mechanical expertise. Your Toyota dealer will quote $350-$400 for parts and labor to complete the job. You can do it for the cost of the Denso OEM part on Amazon and your willingness to climb under your truck.
The tools recommended for the job are:
1. 12mm socket
2. 12mm open end wrench
3. 10mm socket
4. 10mm open end wrench
5. socket wrench
6. small flat head screwdriver
7. diagonal cutters
8. Zip-tie
9. Heat resistant anti-seize compound
Toyota is notorious for their positive-locking electric connections, and this part is no exception. The electrical connector has a tiny locking tab located on the side of the connector which must be released to separate the male and female ends. More on that later.
Here’s what I recommend to complete the process:
1. Remove the electrical connector metal support bracket to allow easy access to the electrical connection. Use diagonal cutters to cut any retaining parts for the electrical cable. Use a 10mm socket and/or 10mm open end wrench to do this. It’s tight quarters…very tedious…one click at a time. BUT…it’s the only way you can truly obtain access/purchase to remove the electrical connection. This is the “easy” part…reattaching the bracket later is THE most difficult part of this entire job.
2. Remove the old O2 sensor from the exhaust pipe. I used both an open end 12mm wrench and 12mm socket. If the bolts are rusted use your favorite penetrating oil. I applied this a day before I did the job.
3. Separate the electrical connection. ****Here’s the trick to removing an infamous Toyota electrical connection: use a small flat head screwdriver to drive under the plastic locking clamp on the SHORTER SIDE of the electrical connector to move it up and off the plastic locking tab.**** If you do this you can easily pull the connector apart using you fingers.
4. Install the new Air Fuel sensor. I began with the electrical connector. Push the male sensor connector on to the female connector attached to your vehicle. There are two ribs on the side of the connector to ensure you get this aligned correctly. You’ll hear a “snap” as the parts mate and the locking tab secures the two parts.
5. Coat the 12mm studs with anti-seize compound. Place the NEW gasket on the fitting…DO NOT re-use an old gasket. Denso includes a new gasket with each sensor part. Using caution not to get anti-seize compound on the new sensor, slide it over the studs. Hand tighten the 12mm nuts. Then ALTERNATE tightening each nut in SMALL INCREMENTS until you’ve reached the magical 14 foot-pounds of torque recommended in the Toyota shop manual. If you have any doubt regarding the cleanliness of the sensor…clean it with isopropyl alcohol before installation.
6. Now the HARD PART: reinstalling the electrical connection supporting bracket. This will be a tedious process. I initially aligned the bolt on the bracket and after MULTIPLE ATTEMPTS…finally got the bolt started. I hand-tightened it from there…and then used the 10mm socket. This process will test your patience…but you’ll eventually get it. Just think of the several hundred bucks you’ve saved to keep your sense of humor.
7. Install a zip-tie to secure the O2 sensor electrical lead to one of the metal automatic transmissions lines…or whatever your vehicle originally had in place to secure the lead.
8. Reset your OBDII to eliminate the P0135 code.
9. Drive your truck long enough to allow it to become fully heated to normal operating temperature. The Toyota ECU expects to see the Air Fuel Sensor electrically heated to a pre-determined temperature in a specified period of time after start, or it will send a P0135 code. If your vehicle is fully warmed up…and you don’t get a CHECK ENGINE amber light…congratulations…you fixed the problem! I always turn off the engine and ignition and re-start a few times just to be sure.
10. Politely apologize to your neighbors for any profanity they might’ve overheard during you many attempts to re-attach the electrical connection support bracket.
I’ve attached photos of the major aspects of the installation process. Good luck!
This Denso brand is apparently original equipment for Toyotas, and is the recommended replacement. Shipping took a little longer than standard 2 day prime, but still came quickly and the price was excellent. Product appeared identical to the original.
My sensor bolts were in great condition with no corrosion so I did not bother replacing them as some people suggest. I simply sprayed some liquid wrench on them and let sit for about 30 minutes and the 12mm bolts came right off. Remove the 10mm wire harness bracket bolt so you can drop down the connector making it easier to push the tab and pull it apart. Clean up the flange, put on the new gasket and sensor and put the bolts back on. Plug in the connector and reattach. Disconnect battery for a few minutes or use a code reader to clear the code.
Spend 30 minutes under your car and save yourself $200.