TRQ oxygen sensors are manufactured to precise specifications using premium raw materials to optimize your vehicle’s emission system. Each sensor is isostatically-pressed for improved strength and durability, and plasma-sprayed to improve sensitivity and prolong the service life of the sensors. Oxygen sensors wear out over time and should be replaced every 60,000 miles to prevent poor engine performance. TRQ recommends replacing the oxygen sensors in sets to optimize fuel economy and reduce overall emissions. All products are fit and road-tested in our Massachusetts R&D facility to ensure we deliver on our promise of Trusted Reliable Quality.
Product Features
Application Specific Design: No modifications and pre-calibrated
Isotatic-pressed and plasma-sprayed for extended service life
Double-Layered 310S Stainless Steel: Additional protection from moisture and debris
Restored Engine Performance: Improved fuel economy and lower emissions
What is Upstream vs. Downstream?
Upstream location is between the catalytic converter and the engine
Downstream location is between the catalytic converter and the tailpipe
Install Tip: You may be required to reset the vehicle computer after installation of this part.
Item Condition:New
Attention California Customers:
WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event that this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
Returns: Parts with electrical components cannot be returned once installed.
FREE Shipping is standard on Orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii, Alaska and US Territories. Shipping is not available to Canada.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii and US Territories as well as P.O. Boxes and APO/FPO/DPO addresses. Final shipping costs are available at checkout.
Is my Car a California or Federal Emissions Vehicle
1A Auto Product Video - Oxygen Sensor 1AEOS01016
How to Replace Downstream 02 Oxygen Sensor 2012-2017 Toyota Camry
How To Replace 02 Sensor 2006-12 Toyota RAV4
How To Replace Downstream O2 Sensor 2009-2010 Pontiac Vibe
O2 Sensors is it Upstream or Downstream
How to replace O2 Sensor 2003-09 Toyota 4Runner
How to Replace Downstream O2 Oxygen Sensor 2007-2011 Toyota Camry 24L L4
Created on:
Tools used
No Tools Needed
1. Determining Your Emissions Specification
Open your hood
Locate your catalyst sticker
If the sticker says "This vehicle conforms to California regulations," you have a California emissions vehicle
If the sticker says "This vehicle conforms to US EPA regulations," you have a federal emissions vehicle
If the sticker lists both EPA and California regulations, you have a California emissions vehicle
Hi, I'm Mike from 1A Auto. We've been selling auto parts for over 30 years. We're dedicated to delivering quality auto parts, expert customer service, fast and free shipping, all backed by our 100% satisfaction guarantee. Visit us at 1AAuto.com, your trusted source for quality auto parts.
Determining whether or not your vehicle is a California emissions or a federal emissions vehicle is pretty straightforward. To do this, you'll want to locate your catalyst sticker under the hood of your vehicle. It'll either be actually on the bottom side of the hood, most GM vehicles have it on the air box, and other vehicles may have it along your radiator support at the front of the engine bay.
All you need to do is see, "This vehicle conforms to California regulations." That means that this vehicle is a California emissions car. Just because you're not in California or are in California doesn't necessarily mean your vehicle will be one way or the other.
Now, our F150 has it down here on the radiator's support, right at the front of the engine bay and you can see here, "This vehicle conforms to US EPA regulations." This means that this vehicle is a federal emissions.
Now, here we have two things that are a little different. Our catalyst is located on the vehicle's air box and this vehicle conforms to US EPA regulations and California regulations. If it conforms to both federal and California emissions, it's considered a California emissions vehicle.
Thanks for watching. Visit us at 1AAuto.com for quality auto parts, fast and free shipping, and the best customer service in the industry.
Tools used
No Tools Needed
1. No instructions needed
No instructions needed
Tools used
Gloves
Flat Blade Screwdriver
7/8 Inch Socket
Safety Glasses
Tools used
Rust Penetrant
22mm Wrench
Pliers
Tools used
O2 Sensor Socket
3/8 Inch Drive Ratchet
Pick
Tools used
No Tools Needed
1. Identifying your Oxygen Sensors
Upstream oxygen sensors are located in between the engine and the catalytic converter
Downstream oxygen sensors are located in the catalytic converter or farther away from the engine than the catalytic converter
Locate your vehicle's firing order diagram
The bank that contains cylinder one is bank one
The bank that does not contain cylinder one is bank two, even if it does not contain cylinder two
Hi, I'm Mike from 1A Auto. We've been selling auto parts for over 30 years. We're dedicated to delivering quality auto parts, expert customer service, fast and free shipping, all backed by our 100% satisfaction guarantee. Visit us at 1AAuto.com, your trusted source for quality auto parts.
In this video I have a couple of oxygen sensors with me. While there are some aesthetic differences here, the wire lengths are a little different, the actual body and tip of the sensor are a little different, the threads and gasket are the same, and on the other end the connections are actually the same. I can plug these into either position on our vehicle. But if I had to ask you which one's upstream and which one's downstream, you probably can't tell just from looking at them. That's true of most oxygen sensors. The way you determine whether or not an O2 sensor is upstream or downstream is all done visually.
Your oxygen sensor position can be determined relative to your catalytic convertor. As the name suggests, upstream sensors will be located upstream or ahead of, in front of, above, closer to the engine than your catalytic convertors. This means that they see the exhaust gasses first. They then go through the catalytic convertor and to the downstream oxygen sensor, which will either be located in the catalytic convertor like our vehicle here, or after the catalytic convertor to monitor the gasses coming out of the cat and make sure that it's being efficient relative to the readings of the upstream O2 sensor.
The other determination you need to make is bank one versus bank two. Determining which bank is which can be done by looking at a picture of your vehicle's firing order. Whichever bank contains cylinder one is going to be bank one, and the other one, regardless of whether or not cylinder two is in it, is going to be bank two by default. These banks are true of V engines like V8s, V6s, and flat engines like Porsches and Subarus that have individual banks.
On inline four-cylinder engines, as long as they have one exhaust manifold like a Jeep four-liter or a four-cylinder Honda engine, you'll only have one bank with an upstream and downstream O2 sensor. There will be no bank two on the engine.
On our vehicle here, this is the passenger side, which we've already determined from the firing order is bank one. We have our upstream sensor here closest to the engine ahead of the cat. Then we have our downstream or sensor two here inside of the catalytic convertor. This could also be located somewhere after the cat. Here I have my two sensors for the vehicle. While they are aesthetically different, we can now tell this is my upstream sensor because it looks just like the upstream sensor I have up there. This is my downstream sensor. Now that we know which one's which, we can order the right part, correct the problem, and fix you up right.
Thanks for watching. Visit us at 1AAuto.com for quality auto parts, fast and free shipping, and the best customer service in the industry.
Tools used
O2 Sensor Socket
22mm Wrench
Tools used
Torque Wrench
Gloves
Socket Extensions
Ratchet
Safety Glasses
22mm Socket
OSA61644
In Stock
Product Reviews
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5.00/ 5.09
9 reviews
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Oxygen sensor
R
November 8, 2017
Good value worked and fit fine. The tool made it easy
Satisfied with my purchase
Rohit
November 30, 2017
The product shipped on time and came as advertised. Although it was pain to remove the old one and install the new one but that is because of the location on my Toyota Avalon. Installation was a breeze when I somehow managed to thread it in. The install tool was a life saver though and I would highly recommend to all to get it along with the sensor since it helped me out a ton.
Return policy
gregory
April 23, 2018
I ordered the wrong part because I wasn't sure of the fit, but A1 allowed me to return the part for a full refund and sent me the correct one.. The correct part was an exact fit and I have had no problems with it. I would recommend A1 to anyone including family and friends.
Exact fit on sensor, easy to use tool
Aaron
November 19, 2018
The new oxygen sensor was easy to install and an exact fit for my vehicle. The tool provided in this kit was ideal because I had the option of using a 3/8 ratchet or a wrench on this socket to remove the old sensor.
Oxygen sensors for MR2
NORA-E
December 3, 2019
The service, quality of the product and the prompt delivery are great. Would recommend to others.
fantastic DIY support
G
December 17, 2019
My mechanic is GREAT--but it seems every time I pull into his garage, I'm out $500. Typical of modern technology, there are some things that seem like they should be difficult and expensive, but in reality are quite simple and relatively cheap to repair/replace. Air filters, Oxygen sensors, and fuses are prety good examples.
1A Auto's DIY videos made it pain-free to replace the oxygen sensor on my "old-reliable" 4 Runner. The kit even came with the special installation tool which I bet my mechanic doesn't even have.
1A Auto's great cross-referencing database, easy order and ship system, and online Videos gave me the confidence to take care of the job myself! I'm not super hands-on, but by just following the directions 1A provided in the video, I was able to get the job done!
Thank you 1A Auto!
Exact replacement for 1999 Toyota Sienna.
Matthew
May 14, 2021
Easy to replace and computer reads this sensor. Good quality for the price. I have 3,000 miles so far and still works.
J W
James
December 5, 2023
O2 sensor for my 2005 Camry. Parts came in on time. Price was great with free shipping and also included specialty socket in that price range. Anti siege already applied to threads. So far works great. We will see how long it lasts.
wm
April 24, 2024
Arrived on time and as described. Well packaged and no install problems. Would recommend.
Customer Q&A
Is it the bank 1 sensor 1 99 Camry v6?August 28, 2017
Rizic G
10
I don't remember if it is bank 1 sensor 1, but it is the one on the back of the engine near the firewall. ( I used on 98 Avalon 3.0 V6)
August 28, 2017
Branislav B
10
Yes, this is the upstream (sensor 1) sensor for a 1999 Toyota Camry, but will not be correct if your vehicle is equipped with California emissions.
September 3, 2017
Tim K
can this sensor fit a 4 cylinder 2011 rav4 ?March 22, 2018
Israel M
does it come with a gasket & plate?June 9, 2023
Jaime M
10
New hardware is not included with this item. You may be able to reuse your original hardware if it is in good condition.
June 10, 2023
Jean O
Is that bank 1 sensor 2 for Camry 2005 le?October 21, 2023
Teresa F
10
This is the front downstream sensor for the 2005 Camry.
October 23, 2023
Kemal S
Customer service
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