Specifications:

  • Brand New Oxygen Sensor
  • Direct Fit
    • Correct Connector No cutting or splicing
    • Correct wire length (17.75 Inches)
  • Upstream Sensor
  • 1 wire configuration
  • Replaces dealer part numbers: 12563312, 21022987, 21025117, 24576682, 24576791, 8245767910, 82457 67910, 21022987, 21025117
  • 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 run poorly or 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 : Identifying your Oxygen Sensors (0:57)
    • 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

Tools needed for replacement:

    1A - No Tools Needed

  • No Tools Needed

5.0 / 5.0
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I recently ordered these o2 sensos for my sons car. Great price and quick shipping. Ended up having other issue with car so didn't install them. Sent message to return items and was very pleased with quick response and the way they handled it. I will be dealing with them again. Thank you.
October 22, 2017
Purchased
7 months ago
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Vehicle Fit

  • 1999 Chevy Cavalier L4 2.4L Upstream O2 Oxygen Sensor
  • 1999 Chevy Cavalier L4 2.2L Upstream O2 Oxygen Sensor
  • 1999 Chevy Malibu L4 2.4L Upstream O2 Oxygen Sensor
  • 1999-2000 Chevy S10 Pickup L4 2.2L Upstream O2 Oxygen Sensor
  • 1999-2000 GMC S-15 Sonoma L4 2.2L Upstream O2 Oxygen Sensor
  • 1999-2000 Isuzu Hombre L4 2.2L Upstream O2 Oxygen Sensor
  • 1999 Olds Alero L4 2.4L Upstream O2 Oxygen Sensor
  • 1999 Pontiac Grand Am L4 2.4L EGR Valve Upstream O2 Oxygen Sensor
  • 1999 Pontiac Sunfire L4 2.4L Upstream O2 Oxygen Sensor
  • 1999 Pontiac Sunfire L4 2.2L Upstream O2 Oxygen Sensor
  • 1995-2002 Saturn SC Coupe Upstream O2 Oxygen Sensor
  • 1995-2002 Saturn SL Sedan Upstream O2 Oxygen Sensor
  • 1995-2001 Saturn SW Wagon Upstream O2 Oxygen Sensor

This part replaces:

  • OE # 12563312
Part #: 1AEOS00123

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

How-to Video:

(03:08 min)