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Drivetrain

How to Replace Downstream O2 Sensor 2004-2009 Mazda 3 23L L4

Created on: 2025-06-20

This video shows you how to install a new downstream o2 sensor from TRQ on your 2004-2009 Mazda 3 (2.3L L4).

Tools needed

  • 12mm Socket

    Torque Wrench

    Gloves

    Jack Stands

    Wheel Chocks

    Floor Jack

    Safety Glasses

    22mm Socket

2004 - 2008  Mazda  3
2007 - 2008  Mazda  3
2007 - 2008  Mazda  6
2008 - 2008  Mazda  3
2004 - 2007  Mazda  3
2006 - 2006  Mazda  3
2006 - 2006  Mazda  6
2009 - 2009  Mazda  3
2011 - 2014  Mazda  2

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O2 Oxygen Sensor

Mazda 2 3 6 O2 Oxygen Sensor TRQ OSA61785

Part Details:

  • Square
  • 33.46 in
  • Female
  • M18x1.5-6e
  • 22 mm
  • Specific
  • 4
  • 18 mm
  • Threaded
  • 28.74 in
  • 4
  • Female
  • Thimble
  • 850 mm
  • Standard Replacement
  • 730 mm
  • Pressure Contact
  • 0.87 in
  • 0.71 in
  • Narrow-Band
  • Yes
$49.95
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How to Replace Downstream O2 Oxygen Sensor 2000-02 Chevy Suburban

This video will show where each oxygen sensor is located and also how to replace the Bank 2 sensor 2 oxygen sensor if it turned on the check engine light

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