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.
How to Replace O2 Oxygen Sensor 1990-2010 Ford F150 Truck
How to Replace Downstream O2 Sensors 2009-2014 Ford F-150
O2 Sensors is it Upstream or Downstream
How to Replace Downstream O2 Oxygen Sensor 2006-07 Ford Explorer V8 4-6L
How To Replace Passenger Side O2 Sensor 1997-2005 Ford F150
Created on:
Tools used
22mm Wrench
1. Removing the Driver Side O2 Sensor
Locate the O2 sensor on the driver side of the truck behind the catalytic convertors
Loosen the O2 sensor with a 22mm wrench
Disconnect the wiring harness
Remove the O2 sensor
2. Installing the Driver Side O2 Sensor
Tighten the O2 sensor by hand without twisting the wires
Tighten the O2 sensor with a 22mm wrench
Connect the wiring harness
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 a 100% satisfaction guarantee. So visit us at 1AAuto.com, your trusted source for quality auto parts.
Right here, on the driver's side of the truck right behind the catalytic converters you'll find an O2 sensor. This is the rear O2 sensor, also known as the downstream sensor, and it's pretty easy to disconnect on this truck, especially in this case because this truck actually has a brand-new catalytic converter pipe and it has relatively new O2 sensors. So we're going to show you how to replace them.
We're going to use a 22 millimeter wrench. You can come up from the front and get the wrench on their pretty easily, and then it's just a matter of pushing up to loosen the O2 sensor. Then, if you follow the wire up to the top of the transfer case, you can see it plugs in right here. And if you pull on, if you push the little tab down, right here, and then pull on the connector, it should slide right out. At that point, you can come right back around and spin your O2 sensor right out of the exhaust system, just like that. There we go.
When installing the O2 sensor, you always want to put the O2 sensor in first and tighten it up rather than plugging it in first, and that way it makes it so your wires don't get all bound up. So right now, you can spin it into the hole and make sure that the wires aren't getting all twisted up at the same time. Because if you twist the wires up, sometimes they'll actually get damaged and we don't want to do that. So, we'll use the same 22 millimeter wrench to tighten up the O2 sensor from the front just like when we loosened it.
All right. It's nice and tight now. And at this point we can feed the wire up over the transfer case and we can play it right into the wire harness, just like that.
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
Gloves
O2 Sensor Socket
Jack Stands
Wheel Chocks
22mm Wrench
Anti-Seize Grease
Ratchet
Floor Jack
Safety Glasses
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
Hammer
Rust Penetrant
Jack Stands
Floor Jack
Wire Cutters
7/8 Inch Wrench
1. Removing the Oxygen Sensor
Raise and support the vehicle
Disconnect the oxygen sensor electrical connector
Cut the oxygen sensor wire with wire cutters
Remove the oxygen sensor with a 7/8" wrench
Strike the wrench with a hammer if necessary
Apply rust penetrant to the sensor if necessary
2. Installing the Oxygen Sensor
Remove the shipping protector from the oxygen sensor
Thread the oxygen sensor into the catalytic converter
Tighten the sensor with a 7/8" wrench
Connect the oxygen sensor electrical connector
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, we're going to show you how to replace the downstream oxygen sensor on this 2006 Ford Explorer. It has the 4.6 liter engine. We show you on, I believe the passenger side; driver's side's the same procedure. We hope you like the video. Please click subscribe. Check out 1AAuto.com for all your parts needs for your Explorer or whatever vehicle you might have. Here are the items you'll need for this repair.
Raise and support your vehicle with jack and jack stands. We have ours on a lift. The downstream oxygen sensors are the ones that go right into the catalytic converter. Passenger side is here and driver's side is over here. We're going to show you how to replace the passenger side one.
Follow your oxygen sensor connection up to this blue connector here. There's a tab right here. Press with your thumb and pull to disconnect. To remove your bad O2 sensor, just use a pair of pliers or a pair of wire cutters and cut the wires. That allows you to easily get a 7/8ths wrench right down and on. Many times these are in there kind of tough, so I like to use a hammer just to give it some impact. A few hits will loosen it up. Use some rust penetrant and let it sit. And then I've got it out a little bit and then put rust oil on there, rust penetrant, and now I'm actually going to thread it back in and see if I can work some down in. The old sensor is out.
Here are the old sensor from the vehicle and the new one from 1A Auto. Remove the shipping protector before installation. The connections are exactly the same. The oxygen sensors are exactly the same. The one from 1A Auto is going to be a very good replacement. It's going to fit and function just like your original. New oxygen sensors are available at 1AAuto.com.
Thread in the oxygen sensor. Use a 7/8ths wrench and use the open end to tighten it up. And then just make sure your lead goes up and the tab is down to go into the connector and plug it in and make sure it clicks.
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
22mm Wrench
1. Removing the O2 Sensor
Loosen the bolt on the sensor with a 22mm wrench
Twist out the sensor
Disconnect the wiring harness
Remove the O2 sensor
2. Installing the O2 Sensor
Twist the O2 sensor into place
Tighten the 22mm nut
Connect the wiring harness
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.
Right here on the passenger side of the tuck, on the rear, right behind the catalytic converter, is your rear O2 sensor. It's also known as a downstream O2 sensor, and it's quite easy to take out on this truck. This one actually has a newer exhaust system in it, which is actually making it even easier for us. If yours is old and rusty, it'll take a little bit more force, but it'll still work the same exact way. We're going to start with a 22 millimeter wrench on the O2 sensor itself. We should be able to loosen it up just like that. There is such a thing as an O2 sensor socket, which also makes life a little bit easier. There you go, it's actually out of the pipe that easily.
An O2 sensor socket will make it easier because it fits around the whole socket, or the whole O2 sensor itself, and it allows the wires to go through. So you can use a big breaker bar if you need to instead of a wrench that might slip.
Up at the top of the sensor is a connector, which you need to disconnect to get the sensor out of the truck. Looks like it's going to be a two handed thing. I apologize for kind of blocking the camera there, but you can see this is how the clip works. You push down the tab right here and it releases it from the other connector. Whenever you install an O2 sensor, you never want to plug it in first. You always want to install it first, because when you install it. It's going to spin and if the connector doesn't spin, you're going to bind up all the wires and sometimes it'll actually damage the wire. If you're ever putting an O2 sensor in, make sure you screw it in first. Then once it's all the way screwed in, then you plug it in.
Same 22 millimeter wrench is what we're going to use to tighten it. At that point, you can go up to where you disconnected it. It's the blue connector right on top of the transfer case. Where the transfer case meets the transmission, I should say. At this point, it should snap right into place. Just like that. You'll feel it click.
Thanks for watching. Visit us at 1AAuto.com for quality auto parts, fast and free shipping, and the best customer service in the industry.
OSA61636
In Stock
Product Reviews
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4.56/ 5.016
16 reviews
5 Stars
4 Stars
3 Stars
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1 Star
14
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Great auto products
S
July 18, 2018
I got a great deal on my o2 sensors and spark plugs for my 2003 F150 everything fits and works great.
Honestly I will buy all my parts from 1aauto.com from this day forward.
T
July 22, 2018
I was completely satisfied with my purchase, and I will recommend this to everyone. Thank you.
C
March 30, 2019
Fit perfect. Came quickly, highly recommend A1
Did not meet expectations
J
May 2, 2019
This was a hard to reach job and i was working dilegently to try and plug in to find out that the freaking connector was not plug and play even though it was bought vehicle specific. It was just i little size difference to make it not work. So I finally resulted in the ghetto way just because I was tired and frustrated to cut off the connector and just wired together with a splice and electrical tape. Wow was not happy about that but it turned the check engine light off. Overall A1 did not really impress me like all there helpful youtube videos ussually say and do. Sometimes its better to just stay with you local parts store so you can return real quick. In this case im stuck with 3 more brand new 02 sensors that dont plug and play, and that sucks. I guess you live and you learn
Fit just like OEM at a fraction of the cost
Douglas
January 23, 2021
These were a perfect replacement. everything fit as it should \
1A shipping was fast.
Perfect
John
May 2, 2021
Thank you. Perfect fit.
Walter
July 3, 2021
Parts fit as advertised and corrected my issues.
Blanca
July 10, 2021
Didnt work for me they were the not for my car even though it said it will fit
O2
Crystal
October 2, 2021
Perfect fit and love all of there DIY videos.
Francisco
July 10, 2022
Great to do business with you. Thank you.
Worked great for Me
David
August 8, 2022
Truck runs great feels a tad stronger
Shane
October 22, 2022
Good product for the price !!
Gregory
January 1, 2023
So far theyve worked well??
So far, so good - codes cleared!
David
November 6, 2023
Items as described, BIG difference in engine performance, lean codes cleared and haven't returned. Best price, definitely recommend.
Bernard
June 26, 2024
Not sure but they fit my 2007 with v6
Satisfied Customer
Keith
September 9, 2024
Quick delivery. Great price. Good quality. Perfect fit and they are functioning well in my 2008 Ford Expedition, so far. I've noticed an improvement in both my MPG and acceleration.
Customer Q&A
Will this O2 Sensor fit a 2004 new body style 4.6L with a floor mounted 4WD shifter?February 25, 2019
F I
10
Yes, according to the information you provided, this part will fit your vehicle.
February 25, 2019
T I
Will this fit 2002 f150 5.4 lariat?October 25, 2019
Benjamin G
10
Hello, the oxygen sensors you are inquiring about will be a direct fit for the 2002 Ford F-150 with the 5.4 engine. if you have any questions please let us know, thank you!
October 26, 2019
Preston C
Do these sensors fit the 04 mercury mountaineer premier V8?January 25, 2021
Jozalyn C
10
Yes, according to the information you provided, this part will fit your vehicle.
January 26, 2021
Corey M
10
This part will not fit your vehicle, they are only for the V6. We may have a part that is listed to fit.
Please enter your vehicle's year make and model in the search bar at the top of the page. This will display parts guaranteed to fit your vehicle.
January 27, 2021
T I
Will this fit a 2004 mercury mountaineer premier V8?January 25, 2021
Jozalyn C
10
This part will not fit your vehicle. We may have a part that is listed to fit.
Please enter your vehicle's year make and model in the search bar at the top of the page. This will display parts guaranteed to fit your vehicle.
January 25, 2021
Emma F
Will this fit a 2004 mercury mountaineer premier V8?January 25, 2021
Jozalyn V
10
This kit will not fit the V8.
January 26, 2021
Andra M
Does this fit 2002 Ford Lightning ?March 4, 2021
M A
10
As long as it has a 5.4L engine then this will fit a 2002 Ford Lightning.
March 4, 2021
T I
Will this fit 2001 ford expedition 4wd 5.4L ?March 20, 2021
Juan D
10
Yes, according to the information you provided, this part will fit your vehicle.
March 23, 2021
Adam G
Will this fit a 2001 F150 V8 4.6 Liter?June 30, 2021
How do you know which ones are upstream and which are downstream?May 22, 2022
Jorge C
10
The parts will come as being labeled for upstream and downstream.
May 23, 2022
Emma 1
are these 4 wire or 3 i need 4 wire?October 2, 2022
Alandis T
10
If you are asking how many sensors there are, it comes with all 4. 2 upstream and 2 down stream.
October 2, 2022
A C
Are the downstream o2 sensors interchangeable from left to right ?October 30, 2022
Perrythornhill T
10
Yes, the downstream on both the right and left should be able to fit in the others place. The up stream cannot be placed on the down stream, it will give bad readings and false codes if done.
October 31, 2022
A C
Will this fit a 2004 Ford Ranger with a 4.0L 6 cylinder engine?June 30, 2023
Ron D
10
that is a very good question I had the three later
July 1, 2023
Kevin L
10
No, these parts are listed to fit the 2004 Ford Ranger V6 3.0L.
This part will not fit your vehicle, but we may have a part that is listed to fit.
Please enter your vehicle's year make and model in the search bar at the top of the page. This will display parts guaranteed to fit your vehicle. Just be sure to verify all of the information shown in the Vehicle Fit tab before ordering.
July 3, 2023
Kemal S
Those fit in 99 ford explorer 5.0?June 25, 2024
JOSE A
10
No, this kit is specific to 1999 Ford Explorer models with a V6 3.0L engine.
June 26, 2024
Jessica D
Does this fit a 2005 ford ranger 3.0?October 27, 2024
Noah S
10
It should fit. I installed these on my 2004 Ford Ranger 3.0. I erased my check engine light and it didnt come back on.
October 28, 2024
Jaime B
10
This part will not fit your vehicle, but we may have a part that is listed to fit.
Please enter your vehicle's year make and model in the search bar at the top of the page. This will display parts guaranteed to fit your vehicle. Just be sure to verify all of the information shown in the Vehicle Fit tab before ordering.
October 28, 2024
Kemal S
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