• Direct Fit
    • Correct Connector No cutting or splicing
    • Correct wire length (11.8 inches) 
  • Upstream or Downstream Sensor
    • as listed per application
  • 4 wire configuration
  • 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.

Returns Note:

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.

  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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02 Sensor
Ordered the oxygen sensor and received it in 2 days and at only $30 it was worth the money compared to other websites charging $80+ for the same type of sensor. Was very easy to install even came with anti seize, turned the car on and it worked great! No more check engine light and at half the price worth it. Highly recommend for Hyundai Santa Fe 2.4L 2002
April 10, 2018
4 months ago
Nice product, good price, fast delivery, great experience!
You guys make it so easy doing business with you. Fast, efficient and always meeting and exceeding expectations.
October 26, 2017
1 year ago
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I have a 2002 Hyandai Xg350 and I need a 02 oxegyn sensor. It says I need a right and a left one , so will this product work for both the left and right downstream ?
Erick97 on Mar 21, 2018
BEST ANSWER: These are only listed for the passenger side on your vehicle. Thank you!

Vehicle Fit

  • 2001-2004 Hyundai Santa Fe L4 2.4L Upstream O2 Oxygen Sensor
  • 2003 Hyundai Santa Fe V6 3.5L Downstream O2 Oxygen Sensor Passenger Side
  • 2006 Hyundai Santa Fe L4 2.4L Upstream O2 Oxygen Sensor
  • 1999-2005 Hyundai Sonata L4 2.4L Front Bank Upstream O2 Oxygen Sensor
  • 2001 Hyundai XG300 Downstream O2 Oxygen Sensor Passenger Side
  • 2002-2005 Hyundai XG350 Downstream O2 Oxygen Sensor Passenger Side
  • 2005-2006 Kia Amanti Downstream O2 Oxygen Sensor Passenger Side
  • 2001-2003 Kia Optima L4 2.4L Downstream O2 Oxygen Sensor
  • 2004-2005 Kia Optima L4 2.4L Upstream O2 Oxygen Sensor
  • 2006 Kia Optima L4 2.4L (8th Vin Digit 6) Upstream O2 Oxygen Sensor

This part replaces:

  • OE # 3921039040
  • OE # 3921039030
  • Standard Motor Products SG1646
  • Walker Products Inc. 250-24422
Part #: 1AEOS00171

Order must be placed by 4pm ET

How-to Video:

(03:08 min)