Replaces

O2 Oxygen Sensor Walker Products 250-25012 - WKEOS00140

Walker Products Oxygen Sensor: 250-25012

Walker Products, an ISO 9001-2008 / TS16949 certified company, specializes in the manufacturing and distribution of Fuel System Components and Automotive Engine Management products. Walker is committed to meeting or exceeding OEM or equivalent standards and specifications. This effort is backed by Walker's own manufacturing, product management and engineering expertise.

Specifications:

  • Brand New Walker Oxygen Sensor
  • Direct Fit
    • Correct Connector No cutting or splicing
    • Correct wire length (21.65 Inches)
  • Upstream Sensor
    • Wide band
  • 5 wire configuration
  • Replaces dealer part numbers: 3921023700, 39210 23700, 3921023900, 39210 23900
  • 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 : Removing the Engine Cover (0:38)
    • Remove the four 10mm bolts from the engine cover
    • Pull off the engine cover
  2. step : Removing the Heat Shield (0:58)
    • Remove the two 12mm bolts from the heat shield
    • Unclip the oxygen sensor wiring harness from the heat shield
    • Disconnect the oxygen sensor wiring harness
    • Pull off the heat shield around the oxygen sensor wire
  3. step : Removing the Oxygen Sensor (2:12)
    • Remove the oxygen sensor with an oxygen sensor socket and ratchet
  4. step : Installing the New Oxygen Sensor (3:04)
    • Put the new oxygen sensor into place
    • Tighten the oxygen sensor with the oxygen sensor socket and ratchet
  5. step : Reinstalling the Heat Shield (3:50)
    • Put the heat shield into place, pulling the oxygen sensor wire through its cavity
    • Insert the two 12mm bolts into the heat shield
    • Connect the oxygen sensor wiring harness
    • Clip the wiring harness to the heat shield
  6. step : Reinstalling the Engine Cover (4:23)
    • Put the engine cover into place
    • Insert the four 10mm bolts into the engine cover

Tools needed for replacement:

    Ratchets & Related

  • A Piece of Pipe (for leverage)
  • Socket Extensions

  • Sockets - Metric

  • 10mm Socket
  • 12mm Socket

  • Specialty Tools

  • O2 Sensor Socket

5.0 / 5.0
1 Review
5 Stars
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Fast shipping, video was easy to follow, got my old sensor switched out fast with no problems at all.
November 9, 2017
Purchased
5 months ago
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Vehicle Fit

  • 2003 Hyundai Elantra L4 2.0L Automatic Transmission California Emissions Upstream O2 Oxygen Sensor Walker Products 250-25012
  • 2004-2008 Hyundai Elantra L4 2.0L Upstream O2 Oxygen Sensor Walker Products 250-25012
  • 2009 Hyundai Elantra L4 2.0L (Built Before 4/03/09 Production Date) Upstream O2 Oxygen Sensor Walker Products 250-25012
  • 2004-2009 Kia Spectra L4 2.0L Upstream O2 Oxygen Sensor Walker Products 250-25012
  • 2005-2009 Kia Spectra 5 L4 2.0L Upstream O2 Oxygen Sensor Walker Products 250-25012

This part replaces:

  • Walker Products 250-25012
Only 1 left in stock
Part #: WKEOS00140

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

Walker Products
Brand #: 250-25012

How-to Video:

(04:49 min)