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Home > Mercury > Mariner Hybrid > Oxygen Sensors > 2006-2008 Mercury Mariner Hybrid Upstream O2 Oxygen Sensor for L4 2.3L (Walker Products)

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2006 - 2008 Mercury Mariner Hybrid Upstream O2 Oxygen Sensor for L4 2.3L (Walker Products)


In Stock (Ships same day for orders placed by 3 PM ET)

List Price:$187.12
Our Price: $79.95
 (You Save $107.17)

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Part Number: WKEOS00048

Welcome Message from 1A Auto

Walker Products Oxygen Sensor: 250-24301

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.


  • Brand New Walker Oxygen Sensor
  • Direct Fit
    • Correct Connector No cutting or splicing
    • Correct wire length (15.75 Inches)
  • Upstream Sensor
  • 4 wire configuration
  • Replaces dealer part numbers: 3S4Z9F472BA, 3S4Z 9F472 BA, 5L8Z9F472AA, 5L8Z 9F472 AA, 5L8Z9F472BA, 5L8Z 9F472 BA, 7T4Z9F472A, 7T4Z 9F472 A, F7VZ9F472AA, F7VZ 9F472 AA, F8VF9F472AA, F8VF 9F472 AA, F8VF9F472B2A, F8VF 9F472 B2A, F8VF9F472BA, F8VF 9F472 BA, F8VF9F472BA1, F8VF 9F472 BA1, F8VZ9F472AA, F8VZ 9F472 AA, F8VZ9F472BA, F8VZ 9F472 BA, XC2F9F472A1A, XC2F 9F472 A1A, XC2F9F472AA, XC2F 9F472 AA, XC2F9F472B1A, XC2F 9F472 B1A, XC2F9F472B2A, XC2F 9F472 B2A, XC2F9F472BA, XC2F 9F472 BA, XC2F9F472BB, XC2F 9F472 BB, XC2Z9F472A1A, XC2Z 9F472 A1A, XC2Z9F472AA, XC2Z 9F472 AA, XC2Z9F472BA, XC2Z 9F472 BA, XC2Z9F472BB, XC2Z 9F472 BB, XL8Z9F472AA, XL8Z 9F472 AA, XL8Z9F472BA, XL8Z 9F472 BA, YL849F472BC, YL84 9F472 BC, YL8Z9F472BA, YL8Z 9F472 BA, XR86938, AJ0418861B, AJ04 18861 B, CY0118861, CY01 18861, EFTT18861, EFTT 18861, L3H518861, L3H5 18861, ZZC318861, ZZC 318861
  • 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.

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

1 Year Warranty

This item is backed by a 1 Year Manufacturers Warranty. In the event this item should fail 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.

Part Brand: Walker Products # 250-24301

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