California Air Resources Board (CARB) Certified: No
Emissions Regulations: This product is not C.A.R.B. (California Air Research Board) approved.
Install Tip: You may be required to reset the vehicle computer after installation of this part.
Item Condition:New
Attention California Customers:
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event 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.
We cannot ship this item to California or Colorado, as it is not California Air Research Board approved.
In the state of New York, this item cannot be installed on California emissions equipped vehicles.
In the state of Maine, this item cannot be sold for or installed on a 2001 model year or newer, California emissions equipped vehicle.
Emissions information can be found on a tag under the hood or from a dealership based on your VIN.
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 a P.O. Box, APO/FPO/DPO address, US Territories, or Canada. Shipping to: CA California, CO Colorado, NY New York or ME Maine is prohibited due to state emissions regulations.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii, and US Territories.
O2 Sensors is it Upstream or Downstream
Is my Car a California or Federal Emissions Vehicle
Created on:
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
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.
Product Reviews
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5.00/ 5.06
6 reviews
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Perfect!
John
October 18, 2018
Part arrived as scheduled and as soon as we put it on the check engine light was gone. Very easy to install and took us about 2hrs to install it. This is not my first A1 purchase and it definitely will not be my last.
Fit like a glove
R
November 20, 2018
Fast shipping. AAA experience, and great price. Everything was as advertised and worked perfect.
Catalytic converter manifold kit
D
February 10, 2019
Great product, it fits perfect and works great, no check engine light for catalytic converter after installation.
Perfect Fit
Marco
December 15, 2019
Part Fit perfectly. Just removed old one and replaced it with 1A Auto one. Car Is running a lot smoother.
J
May 19, 2020
Good quality and fast delivery
Michael
August 1, 2023
Perfect fit and no issues!!!!!
Customer Q&A
Hi. What company produces this and where is it made? Is it oem quality and oem design?September 15, 2018
W F
10
1A Auto's house brand parts are manufactured by various aftermarket companies specifically for us and built to your vehicle's exact OEM specifications.
September 17, 2018
T I
Is this CA/NY compliant?June 27, 2019
Scott H
10
We do not offer catalytic converters that can be shipped to California, Maine or New York.
June 28, 2019
A C
If you have a CA compliant Converter can you install a non-CA without computer issues?June 28, 2019
Scott H
10
If your vehicle has the California emissions standard you cannot install a catalytic converter that is not specifically designed for California emissions.
June 28, 2019
A C
10
All emissions information for a vehicle can be found on a tag under the hood. If the tag is missing, you can contact a dealership with your VIN to determine which emissions system your vehicle is equipped with.
July 1, 2019
Jessica D
Is this part is legal in New York ?April 13, 2021
Juan H
10
Due to CARB emission laws, we are prohibited from shipping catalytic converters to the state of New York.
April 14, 2021
T I
Do I need to tune my car at all with this?September 2, 2022
John D
10
No, this part is built to the same specs as the OE part.
September 2, 2022
Andra M
Customer service
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