1AEOS01029-O2 Oxygen Sensor



O2 Oxygen Sensor DIY Solutions EMS00438

03-05, 07 Buick Cadillac GMC Truck Multifit Oxygen Sensor
$ 36.95
23% OFF
23% OFF
DIY Solutions
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Part 1AEOS01029

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Part 1AEOS01029
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Product Reviews
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4.76/ 5.0 38
Oxygen Sensor Excellence
January 31, 2017
Best price I could find, fits perfectly as the original did, shipped quickly. I would definitely recommend this product and I always check A1 Auto first when looking for OEM replacement parts.
Oxygen sensors
February 16, 2017
They fit and worked perfectly , easy and fast ordering and quick delivery
O2 sensor replacement
February 20, 2017
Quick & easy, worked without issue! Delivery was fast!
failed product
March 4, 2017
The service was excellent -got the product in good time put it on -worked great for ten days then the rpms went down then back up the down and died. The comp. read out is upstream ox censor -how do I proceed from here Bill
Issue with part resolved quickly
March 12, 2017
The original part received was faulty. I believe it had a bad connection at one end of one of the wires. A replacement was shipped out after customer service was convinced it was faulty. the 2 part shipped quickly and resolved the car problem. I will buy from 1A Auto again but cautiously since the parts appear made in China as long as their support remains top notch .
o2 sensor
May 13, 2017
shipping was fast (no cost) thanks to video installation was easy would recomend a1 auto
July 16, 2017
I Would recommend this product to anyone who has this problem with upstream 02 sensor. It was easy to remove replace product .After I removed negative battery terminal rest check engine light it did not come back on and am extremely satisfied.
Perfect part
August 7, 2017
Arrived on time and cleared my trouble code. Installation video was a big help.
Great parts!!
August 9, 2017
This part was an exact fit very easy to install and I would recommend this part. I bought other parts A1Auto that fit perfectly .
Purchase & install 4 O2 sensor, 03 silveroda 5.3
September 16, 2017
I installed all them in my home garage less then two hours. Disconnected the battery for two hours. Took the truck for a drive. The check engine light went out in about ten miles. Everything is alright so far. (I am a DIY person.)
Good deal
September 24, 2017
Price was much better than what they offers locally. It arrived on time and well packaged. Plugged right up to my truck, no problems installing. No more check engine light. I would recommend this product to anyone needing it. But I would add make sure it's your sensor first and not something else causeing it.
Great product
December 5, 2017
Went to the auto parts store to get the check engine light looked at, all codes pointed toward the Oxygen sensor but the store couldn't tell me which one. The cost at the store was almost twice what I paid for on 1A Auto for a single sensor. I purchased all 4 and replaced them on my truck in about 1.5 hours. Parts fit exactly without an issue, check engine light is off now, truck is running a lot better as well. I would definitely recommend and purchase from them again!
Great product
January 10, 2018
Sensor arrived quick, other than the fact that Chevrolet gives you NO room to fit a normal size hand to get to the connector, this was easy to install.
Great value and quality
February 9, 2018
I was impresseed with the quality, price and the speed that my product arrived. Keep the great work going.
February 12, 2018
Product was exactly what I ordered and was easy to replace
As ordered and as easy as video to install
August 8, 2018
Not a professional mechanic but I followed the instructions on the A1 video to remove the old sensor and install the new one and it took me less than 15 minutes. I added an extra zip-tie. Would highly recommend.
greta service
August 26, 2018
Great service, good product and fast delivery! Good Job, I will order again
Perfect fit
October 11, 2018
The part arrived right on time, it fit perfectly in my car.
Great service
November 20, 2018
I appreciate your low prices, great customer service, and your company stands behind its warranties.
A bit smaller than stock
April 4, 2019
And what I mean by that, is the sensor shaft that goes in the exhaust pipe is a bit smaller than stock. I'm not sure if this will pose any problems. Above that, it installed easily with the proper sensor socket and plugs in to the old fitting. . Unfortunately after installing the sensor I found the wire upstream of the sensor had been rubbing on the front drive shaft and had worn through the wires; thus setting off the "check engine" light. Make sure you check this first and don't just go by the reader like I did. Installed on a 2004 Avalanche Z71 4x4.
Works great
June 10, 2019
Very easy to install, works great MUCH cheaper than buying from anywhere else
Great O2 sensor
June 17, 2019
Fast shipping. Part fit and took care of my problem. Quality and price are great! Highly recommend.
July 1, 2019
Happy with my purchase. Will order from again. Very reasonable prices and I love that it automatically added the tool to replace part in my cart. Made things so much easier. I recommend totally. The videos showing how to replace parts was awesome
August 9, 2019
Having the part put in right now part looks good
November 7, 2019
The O2 sensor was a perfect match for my repair and utter was affordable.
Great part
November 23, 2019
Great part and fit perfectly !! Will buy again!
Oxygen sensor
January 23, 2020
Oxygen sensor was priced fairly it was a perfect match and fix the problem very satisfied
March 13, 2020
Exellent service fast shipping will be back for more parts soon
05 GMC Yukon 02 sensor
April 9, 2020
Exactly what was needed to pass emissions. Fit perfectly.
Thumbs up!
May 14, 2020
Had codes for the upstream O2 sensors, so we changed them both. Parts were a direct fit...seems to be what we needed to correct the problem! The order placed, shipped & received in just a couple days! Thanks 1A!
Great Quality
August 4, 2020
O2 sensors are a pain. This product is made of great quality and hasnt given me any problems installed 4,000 miles ago
Good price
October 16, 2020
Love the price tag. Plugs right in works right the first time. Has anti seize already on the threads.
02 oxygen sensor
November 26, 2020
Perfect it done the job no more check engine light on its been two weeks now
Perfect fit
February 22, 2021
Part fit perfectly and is working great. Will purchase more parts from A-1 when needed. Service is great and parts came quickly.
Always the right part shipped quickly
March 17, 2021
I always buy my parts from one a auto because I cant depend on them to ship the right part for a lot less money than my area auto parts stores. Their web sight is easy to maneuver and they make it easy to order the right part the first time. Write your review here. It must be at least 50 characters long. Consider whether you would recommend this product and what you like or dislike about it.
Perfect fit
April 11, 2021
Ordered 2 of these for 2012 Tahoe and they fit perfect and plugged right in. Check engine light is off now! Thank you.
Great Deal
April 18, 2021
Great oxygen sensor for the price. I shopped around and was glad i did. I highly recommend this site if you're looking for parts.
September 23, 2021
Great part and fix exact
Customer Q&A
How do you tell which sensor is bad?
February 27, 2016
Mark D
Proper diagnostics from a repair facility/shop. Not something you can ID in your driveway
February 29, 2016
Brian F
The auto repair place put a computer hook up to the car, it identified a error number (code), that code identified the item. while the engine light did go out for a period of time the engine light did come back on. hope this helps d
February 29, 2016
Dave H
I cannot answer that. But the cost of doing it myself vs. Paying a garage to replace, it was worth changing 2 at least
March 1, 2016
Griffin D
Which sensor is bank 1 sensor2?
March 21, 2018
Travis B
Bank 1 Sensor 2 - Is the Drivers side; after converter; Bank 1 Sensor 1 - is the Drivers side; before converter;
March 21, 2018
Mark K
Is this one the bank 2 sensor 1 ?
March 12, 2019
Antonio L
This part is specific to vehicles with a particular set of options. We will need more information about your vehicle to confirm the fit. If you can provide your VIN we would be more than happy to assist you further.
March 12, 2019
Ian P
Engine light comes on have it checked out says its 02 oxygen sensor chang that within10 miles the engine light back on check it out and say it needs another 02 oxygen sensor is bad car.runs great is there something else it could be?
April 25, 2019
Fran J
There could be multiple reasons why you're having this particular problem. We suggest taking your vehicle to a nearby reputable shop to identify the cause. Once you know the cause, we'll be happy to see if we carry the parts and how-to videos needed for your repair.
April 25, 2019
Emma F
This is a replacement or original?
August 12, 2019
Carelis R
1A Auto's house brand parts are manufactured by various aftermarket companies specifically for us and built to your vehicle's exact OEM specifications. Please let us know if you have any other questions.
August 13, 2019
Peter L
On 2003 Chevy suburban 1500 5.3 flex fuel 4x4 is the upstream and downstream o2 sensors the same?
September 6, 2019
David S
Yes, I would recommend replacing all 4 sensors at once. I tried one at a time as I got the check engine light. Ended up replacing the newer one too. Once I replaced all 4 at the same time I have had zero issues. Engine going on 192,000 miles
September 6, 2019
David D
Thank you for your inquiry, for that vehicle the O2 sensors will be the same for all 4 locations. Please contact us if you have any further questions.
September 6, 2019
Anthony C
Which sensor is this? Upstream or down stream?
March 31, 2021
Pauli M
It can be either depending on the vehicle it is being installed on. Please check the 'Vehicle Fit' tab to see these details.
April 1, 2021
Andra M
P0141 p0146 codes when have truck driving/on in 100° + days . Why would the Texas heat , not truck overheating, cause the codes?
June 20, 2021
Kendell M
There could be multiple reasons why you're having this particular problem. We suggest taking your vehicle to a nearby reputable shop to identify the cause. Once you know the cause, we'll be happy to see if we carry the parts and how-to videos needed for your repair.
June 21, 2021
Tim K
Customer service


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