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Subaru Legacy Air / Fuel Ratio Sensor Replacement

1
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  1. ✓ In Stock 2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-5003

    O.E. Quality Direct Fit Replacement Sensor

    $124.73 View part →
  2. ✓ In Stock 2020-2022 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2020-2022 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 27081

    B1S1 OE MFR: NTK

    $133.01 View part →
  3. ✓ In Stock 2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24774

    B1S1 OE Equivalent Design

    $139.17 View part →
  4. ✓ In Stock 2008-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream Left or Upstream Right (NGK)

    2008-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream Left or Upstream Right (NGK)

    Partslink #: 24759

    B2S1 OE Equivalent Design

    $145.42 View part →
  5. ✓ In Stock 2015-2020 Subaru Legacy Air / Fuel Ratio Sensor - Upstream or Upstream Left (NGK)

    2015-2020 Subaru Legacy Air / Fuel Ratio Sensor - Upstream or Upstream Left (NGK)

    Partslink #: 24850

    B2S1 OE Equivalent Design

    $311.39 View part →
  6. ✓ In Stock 2015-2019 Subaru Legacy Air / Fuel Ratio Sensor - Upstream Left or Upstream Right (NGK)

    2015-2019 Subaru Legacy Air / Fuel Ratio Sensor - Upstream Left or Upstream Right (NGK)

    Partslink #: 24747

    B2S1 OE Equivalent Design

    $148.88 View part →
  7. ✓ In Stock 2008-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream Left or Upstream Right (NGK)

    2008-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream Left or Upstream Right (NGK)

    Partslink #: 24663

    B2S1 OE Equivalent Design Sel Out & Reorder 24759

    $326.51 View part →
  8. ✓ In Stock 2006-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2006-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24750

    B1S1 OE Equivalent Design

    $148.35 View part →
  9. ✓ In Stock 2006-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Autopart International)

    2006-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Autopart International)

    Partslink #: W0133-3406238
    $149.05 View part →
  10. ✓ In Stock 2004-2005 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2004-2005 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24696

    Located Before RH Primary (Manifold) Catalyst B1S1 Calif. Emissions OE Equivalent Design

    $150.20 View part →
  11. ✓ In Stock 2005-2007 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2005-2007 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24753

    B1S1 OE Equivalent Design

    $151.00 View part →
  12. ✓ In Stock 2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Walker Products)

    2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Walker Products)

    Partslink #: W0133-1893836
    $154.13 View part →
  13. ✓ In Stock 2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24746

    B1S1 OE Equivalent Design

    $155.40 View part →
  14. ✓ In Stock 2013-2024 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2013-2024 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24771

    B1S1 OE Equivalent Design

    $162.60 View part →
  15. ✓ In Stock 2006-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2006-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9123

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $168.50 View part →
  16. ✓ In Stock 2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Bosch)

    2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Bosch)

    Partslink #: W0133-1653210
    $179.15 View part →
  17. ✓ In Stock 2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9047

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $180.00 View part →
  18. ✓ In Stock 2020-2022 Subaru Legacy Air / Fuel Ratio Sensor (NTK)

    2020-2022 Subaru Legacy Air / Fuel Ratio Sensor (NTK)

    Partslink #: W0133-1919050
    $180.54 View part →
  19. ✓ In Stock 2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 27092

    B1S1 OE Equivalent Design

    $180.72 View part →
  20. ✓ In Stock 2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2000-2002 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1836424
    $189.45 View part →
  21. ✓ In Stock 2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9097

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $194.48 View part →
  22. ✓ In Stock 2004-2005 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2004-2005 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9122

    Calif. DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $195.51 View part →
  23. ✓ In Stock 2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9098

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $204.38 View part →
  24. ✓ In Stock 2013-2017 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2013-2017 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9314

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $204.50 View part →
  25. ✓ In Stock 2005-2007 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2005-2007 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9120

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $208.41 View part →
  26. ✓ In Stock 2004-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Walker Products)

    2004-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Walker Products)

    Partslink #: W0133-1894365

    w/ California Emissions

    $213.09 View part →
  27. ✓ In Stock 2003-2004 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2003-2004 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9015

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $214.35 View part →
  28. ✓ In Stock 1999-2001 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    1999-2001 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9018

    Calif. DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $215.07 View part →
  29. ✓ In Stock 2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9035

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $216.48 View part →
  30. ✓ In Stock 2015-2017 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2015-2017 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9139

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $218.52 View part →
  31. ✓ In Stock 2010-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2010-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: 234-9092

    DENSO is the O.E. Manufacturer / Direct Fit Air Fuel Ratio Sensor OE

    $244.97 View part →
  32. ✓ In Stock 2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24831

    B1S1 OE Equivalent Design Sel Out & Reorder 24746

    $254.13 View part →
  33. ✓ In Stock 2006-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2006-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1894364
    $256.01 View part →
  34. ✓ In Stock 2005-2007 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2005-2007 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24821

    B1S1 OE Equivalent Design Sel Out & Reorder 24753

    $260.51 View part →
  35. ✓ In Stock 2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1815466
    $265.44 View part →
  36. ✓ In Stock 2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24830

    B1S1 OE Equivalent Design Sel Out & Reorder 24774

    $265.79 View part →
  37. ✓ In Stock 2004-2005 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2004-2005 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1853136

    w/ California Emissions

    $279.38 View part →
  38. ✓ In Stock 2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1953670
    $281.09 View part →
  39. ✓ In Stock 1999-2001 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    1999-2001 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1606141

    w/ California Emissions

    $294.71 View part →
  40. ✓ In Stock 2003-2004 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2003-2004 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24664

    B1S1 OE Equivalent Design

    $302.52 View part →
  41. ✓ In Stock 2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2010-2012 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24826

    B1S1 OE Equivalent Design

    $310.26 View part →
  42. ✓ In Stock 2003-2004 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2003-2004 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1604381
    $312.51 View part →
  43. ✓ In Stock 2005-2007 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2005-2007 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1853284
    $321.27 View part →
  44. ✓ In Stock 2015-2019 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2015-2019 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-2097259
    $331.08 View part →
  45. ✓ In Stock 2010-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2010-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1953669
    $331.80 View part →
  46. ✓ In Stock 2005 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    2005 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24825

    B1S1 Federal Emissions OE Equivalent Design Sel Out & Reorder 24696

    $342.98 View part →
  47. ✓ In Stock 1999-2001 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    1999-2001 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (NGK)

    Partslink #: 24667

    B1S1 Calif. Emissions OE Equivalent Design

    $355.37 View part →
  48. ✓ In Stock 2013-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2013-2014 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-2097215
    $391.50 View part →
  49. ✓ In Stock 2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    2008-2009 Subaru Legacy Air / Fuel Ratio Sensor - Upstream (Denso)

    Partslink #: W0133-1953525
    $395.22 View part →

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Air / Fuel Ratio Sensor Compatibility for Subaru Legacy

Browse our selection of quality air / fuel ratio sensor parts designed specifically for your Subaru Legacy. We carry options across multiple trim levels, body styles, and engine configurations to ensure a perfect fit.

Available Trims

2.0 · 2.0R · 2.5GT · 2.5i · 2.5i Convenience · 2.5i Limited · 2.5i Premium · 2.5i Special Edition · 2.5i Sport · 2.5i Touring · 3.0 · 3.0 R · 3.0 R Limited · 3.0 R Premier · 3.6R · 3.6R Limited · 3.6R Premium · 3.6R Touring · Base · Brighton · Convenience · GT · GT Limited · GT spec.B · L · L 30th Anniversary · L 35th Anniversary · L SE · Limited · Limited 30th Anniversary · Limited GT · Limited XT · Outback · Outback Limited · Premier · Premier GT · Premium · R · SUS 30th Anniversary · Sport · Touring · Touring XT · i

Body Types

Sedan · Wagon

Engine Options

H4 2.0L · H4 2.2L · H4 2.4L · H4 2.5L · H6 3.0L · H6 3.6L

Transmissions

Automatic · Automatic CVT · Manual

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