This replacement oxygen sensor is just what you need to get your vehicle in good working form again!

Specifications:

  • Brand New Oxygen Sensor
  • Direct Fit
    • Correct Connector No cutting or splicing
    • Correct wire length (16.86 Inches)
  • Upstream or Downstream Sensor
    • as listed per application
  • 4 wire configuration
  • Replaces dealer part numbers: 12558850, 12559850, 12561776, 12562943, 12567127, 12567254, 12590789, 8125671270, 81256 71270, 8972873520, 89728 73520, 97287352, 972873520
  • Built and tested to strict quality control standards

Note: For clarification purposes:

  • Upstream location is between the catalytic converter and the engine
  • Downstream location is between the catalytic converter and the tailpipe

If you have a bad O2 sensor causing your vehicle to fail an emission test then this is the part for you.

Our electrical and electronic parts are subject to strict quality control testing.  Once the item has been installed or plugged in, it is no longer eligible for a refund.  The item may be eligible for replacement, only if it is found to have a manufacturing defect. Before purchasing, please ensure proper diagnosis of the failed original part is performed

Note:  You may be required to reset the vehicle’s computer after installation of this part.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

  1. step : Removing the O2 Sensor (0:37)
    • Pry out the clip and pin from the sensor
    • Disconnect the O2 sensor harness
    • Cut off the harness connector and sensor with wire cutters
    • Remove the O2 sensor wire with a 7/8 wrench
  2. step : Installing the New O2 Sensor (2:20)
    • Twist on the O2 sensor to the exhaust pipe
    • Tighten the O2 sensor with a 7/8 wrench
    • Reconnect the O2 sensor harness
    • Replace the pin and re-clip the harness to the vehicle

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Wire Cutters

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Wrenches - SAE

  • 7/8 Inch Wrench

3.4 / 5.0
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Wrong part
I ordered a new downstream o2 sensor for my 2001 Silverado 1500. The site said the one I ordered would be a direct fit. After cutting the harness off of my old sensor (as instructed to do so in 1aauto how to video) I noticed the new harness will not fit into the existing port. There was an extra notch in the new bracket that wouldn't fit in the port. So now I'm driving with a completely useless o2 sensor until the new correct part arrives. Still like the site though. Heck of a lot cheaper than local auto parts stores. Just needs more clarification in the online description.
April 8, 2018
Purchased
1 month ago
Great service and product
Fast delivery and a perfect fit for my S-10 pickup. Saved me a lot of money and time.

Thanks!!
November 26, 2017
Purchased
6 months ago
O2 sensor
I would highly recommend this product.
It was a perfect fit. Application was a breeze, with I'm minutes the old was out and new one installed. Check engine light gone. Thank you. And delivery was very quick thanks again.
September 27, 2017
Purchased
8 months ago
Best price fast and great service
I have ordered Pat's for my vehicles twice now and both times I received quality parts Wich worked perfect . The staff was great in making sure I got the right parts the first time .they were pleasant to deal with . The shipping was fast I got the parts faster than they said I would . I will be using them from now on whenever I need parts their prices are better than anyone else local. Would definatley recommend to anyone. if you need parts call these guys first
July 24, 2017
Purchased
10 months ago
Junk
After installation my check engine light came back on 3 days letter for the same issue
February 14, 2017
Purchased
1 year ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 1 answer
Will this o2 sensor fit a 2000 Chevy Silverado extended 3 door cab us built with 5.3 v 8 motor down stream pass. Side ?
Steve V on Oct 7, 2017
BEST ANSWER: In order to better assist you, we would need to know whether your vehicle is Canada Built, or a separate location built. Could you provide us the vehicle VIN number?

Vehicle Fit

  • 2001-2005 Buick Century V6 3.1L Upstream O2 Oxygen Sensor
  • 2004 Buick Rainier V8 5.3L Upstream O2 Oxygen Sensor
  • 2002-2005 Buick Rendezvous V6 3.4L Upstream O2 Oxygen Sensor
  • 2000-2004 Cadillac Deville V8 4.6L Upstream O2 Oxygen Sensor
  • 2000-2002 Cadillac Eldorado V8 4.6L Upstream O2 Oxygen Sensor
  • 2000-2003 Cadillac Seville V8 4.6L Upstream O2 Oxygen Sensor
  • 2000-2002 Chevy Astro V6 4.3L Upstream O2 Oxygen Sensor Passenger Side
  • 2000-2002 Chevy Astro V6 4.3L Downstream O2 Oxygen Sensor
  • 2002 Chevy Avalanche 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2002 Chevy Avalanche 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2002-2005 Chevy Blazer S10 V6 4.3L Upstream O2 Oxygen Sensor
  • 2002-2005 Chevy Blazer S10 V6 4.3L Downstream O2 Oxygen Sensor
  • 2001-2005 Chevy Impala V6 3.4L Upstream O2 Oxygen Sensor
  • 2001-2003 Chevy Malibu V6 3.1L Upstream O2 Oxygen Sensor
  • 2001-2004 Chevy Monte Carlo LS V6 3.4L Upstream O2 Oxygen Sensor
  • 2002-2004 Chevy S10 Pickup V6 4.3L Upstream O2 Oxygen Sensor
  • 2002-2004 Chevy S10 Pickup V6 4.3L Downstream O2 Oxygen Sensor
  • 2003-2004 Chevy SSR V8 5.3L Upstream O2 Oxygen Sensor
  • 2000-2002 Chevy Silverado 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 Chevy Silverado 1500 V8 4.8L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 Chevy Silverado 1500 V8 4.8L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2000-2002 Chevy Silverado 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2002 Chevy Silverado 1500 V6 4.3L Upstream O2 Oxygen Sensor
  • 2002 Chevy Silverado 1500 V6 4.3L Downstream O2 Oxygen Sensor
  • 2000 Chevy Silverado 2500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000 Chevy Silverado 2500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2000-2002 Chevy Suburban 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 Chevy Suburban 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2000-2002 Chevy Tahoe V8 4.8L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 Chevy Tahoe V8 5.3L (8th Vin Digit T) (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 Chevy Tahoe V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2000-2002 Chevy Tahoe V8 4.8L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2002 Chevy Tahoe V8 5.3L (8th Vin Digit Z) Upstream O2 Oxygen Sensor
  • 2002 Chevy Tahoe V8 5.3L Downstream O2 Oxygen Sensor
  • 2003-2004 Chevy Trailblazer EXT V8 5.3L Upstream O2 Oxygen Sensor
  • 2002-2005 Chevy Venture V6 3.4L Upstream O2 Oxygen Sensor
  • 2003-2004 GMC Envoy XL V8 5.3L Upstream O2 Oxygen Sensor
  • 2002-2004 GMC S-15 Sonoma V6 4.3L Upstream O2 Oxygen Sensor
  • 2002-2004 GMC S-15 Sonoma V6 4.3L Downstream O2 Oxygen Sensor
  • 2000-2002 GMC Safari V6 4.3L Upstream O2 Oxygen Sensor Passenger Side
  • 2000-2002 GMC Safari V6 4.3L Downstream O2 Oxygen Sensor
  • 2000-2002 GMC Sierra 1500 V8 4.8L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 GMC Sierra 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 GMC Sierra 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2000-2002 GMC Sierra 1500 V8 4.8L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2002 GMC Sierra 1500 V6 4.3L Upstream O2 Oxygen Sensor
  • 2002 GMC Sierra 1500 V6 4.3L Downstream O2 Oxygen Sensor
  • 2000 GMC Sierra 2500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000 GMC Sierra 2500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2000-2002 GMC Yukon V8 4.8L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 GMC Yukon V8 5.3L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 GMC Yukon V8 4.8L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2000-2002 GMC Yukon V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2000-2002 GMC Yukon XL 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Upstream O2 Oxygen Sensor
  • 2000-2002 GMC Yukon XL 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor
  • 2002 Honda Passport V6 3.2L Upstream O2 Oxygen Sensor
  • 2002 Honda Passport V6 3.2L Downstream O2 Oxygen Sensor
  • 2003-2004 Isuzu Ascender V8 5.3L Upstream O2 Oxygen Sensor
  • 2004 Isuzu Axiom V6 3.5L Upstream O2 Oxygen Sensor
  • 2004 Isuzu Axiom V6 3.5L Downstream O2 Oxygen Sensor
  • 2002-2004 Isuzu Rodeo V6 3.2L Upstream O2 Oxygen Sensor
  • 2002-2004 Isuzu Rodeo V6 3.2L Downstream O2 Oxygen Sensor
  • 2004 Isuzu Rodeo V6 3.5L Upstream O2 Oxygen Sensor
  • 2004 Isuzu Rodeo V6 3.5L Downstream O2 Oxygen Sensor
  • 2002-2003 Isuzu Rodeo Sport V6 3.2L Upstream O2 Oxygen Sensor
  • 2002-2003 Isuzu Rodeo Sport V6 3.2L Downstream O2 Oxygen Sensor
  • 2001-2004 Olds Alero V6 3.4L Upstream O2 Oxygen Sensor
  • 2001-2003 Olds Aurora V8 4.0L Upstream O2 Oxygen Sensor
  • 2001-2002 Olds Aurora V6 3.5L Upstream O2 Oxygen Sensor
  • 2000-2002 Olds Intrigue V6 3.5L Upstream O2 Oxygen Sensor
  • 2001-2004 Olds Silhouette V6 3.4L Upstream O2 Oxygen Sensor
  • 2001-2005 Pontiac Aztek V6 3.4L Upstream O2 Oxygen Sensor
  • 2001-2005 Pontiac Grand Am V6 3.4L Upstream O2 Oxygen Sensor
  • 2001-2003 Pontiac Grand Prix V6 3.1L Upstream O2 Oxygen Sensor
  • 2001-2005 Pontiac Montana V6 3.4L Upstream O2 Oxygen Sensor

This part replaces:

  • Standard Motor Products SG1856
Part #: 1AEOS01028

Ships Same Day for orders placed by 4 P.M. ET

How-to Video:

(03:02 min)