O2 Oxygen Sensor - 1AEOS00171

Warranty & Shipping
How-To & Tools
Product Reviews
Vehicle Fit


  • 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

Install note:

You may be required to reset the vehicle computer after installation of this part.

Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm -

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

5.00/ 5.0
2 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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
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
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
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 ?
Erick S March 21, 2018
These are only listed for the passenger side on your vehicle. Thank you!
Adam G March 29, 2018
Year Make Model Description
2001-2004Hyundai Santa Fe Hyundai Santa Fe L4 2.4L Upstream O2 Oxygen Sensor
1999-2005Hyundai Sonata Hyundai Sonata L4 2.4L Upstream O2 Oxygen Sensor
2001Hyundai XG300 Hyundai XG300 Rear Bank Downstream O2 Oxygen Sensor
2001Hyundai XG300 Hyundai XG300 Upstream O2 Oxygen Sensor
2002-2005Hyundai XG350 Hyundai XG350 Rear Bank Downstream O2 Oxygen Sensor
2004-2006Kia Amanti Kia Amanti Rear Bank Downstream O2 Oxygen Sensor
2001-2006Kia Optima Kia Optima L4 2.4L (8th Vin Digit 6) Upstream O2 Oxygen Sensor
Part #: 1AEOS00171

Order must be placed by 4pm ET
Delivery options for:

Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(03:08 min)