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GMC Envoy XUV Oxygen Sensor
49 itemsShop best-selling oxygen sensors for Ford, Chevy, Honda, Nissan, Toyota, and more. Direct-fit O2 sensors with fast response, improved MPG, and reliable emissions performance.
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BoschPart # 15894
Bosch 15894 Oxygen Sensor
46 Reviews
$53.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Buick Rainier, 2006-2006 Buick Rainier, 2002-2002 Chevrolet Trailblazer EXT, 2002-2005 Chevrolet Trailblazer, 2003-2003 Chevrolet Express 1500, 2003-2003 Chevrolet Express 2500, 2003-2003 Chevrolet Express 2500, 2003-2003 Chevrolet Express 2500, 2003-2003 Chevrolet Express 3500, 2003-2005 Chevrolet Astro, 2003-2005 Chevrolet Express 3500, 2003-2005 Chevrolet Trailblazer EXT, 2004-2004 Chevrolet Express 1500, 2004-2004 Chevrolet Express 1500, 2004-2004 Chevrolet Express 2500, 2004-2004 Chevrolet Express 2500, 2004-2005 Chevrolet Colorado, 2004-2005 Chevrolet Express 2500, 2004-2006 Chevrolet Express 2500, 2004-2007 Chevrolet Express 3500
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Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
15894, 12578624, 12589550, 19209805, 12598176, 12603814, 8125786240, 8192098050
item #1002E8YR
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BoschPart # 15896
Bosch 15896 Oxygen Sensor
46 Reviews
$53.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2001-2005 Buick Century, 2002-2003 Buick Rendezvous, 2004-2004 Buick Rainier, 2004-2005 Buick Rendezvous, 2000-2002 Cadillac Eldorado, 2000-2003 Cadillac DeVille, 2000-2003 Cadillac Seville, 2002-2002 Cadillac Escalade, 2000-2000 Chevrolet Silverado 2500, 2000-2000 Chevrolet Tahoe, 2000-2000 Chevrolet Tahoe, 2000-2002 Chevrolet Astro, 2000-2002 Chevrolet Silverado 1500, 2000-2002 Chevrolet Silverado 1500, 2000-2002 Chevrolet Suburban 1500, 2001-2001 Chevrolet Tahoe, 2001-2003 Chevrolet Malibu, 2001-2004 Chevrolet Venture, 2001-2005 Chevrolet Impala, 2001-2005 Chevrolet Monte Carlo
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Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
15896, 12559850, 12561776, 12562943, 12567127, 12567254, 12590789, 8972873520,
...View moreitem #1002E8CU
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BoschPart # 15895
Bosch 15895 Oxygen Sensor
46 Reviews
$51.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2004 Buick Regal, 2004-2005 Buick LeSabre, 2004-2005 Buick Park Avenue, 2004-2005 Buick Rainier, 2005-2005 Buick Century, 2005-2005 Buick Rendezvous, 2005-2007 Buick Allure, 2005-2007 Buick LaCrosse, 2005-2007 Buick Terraza, 2006-2006 Buick Rendezvous, 2006-2008 Buick Lucerne, 2007-2007 Buick Rendezvous, 2000-2002 Cadillac Eldorado, 2000-2004 Cadillac Seville, 2000-2005 Cadillac DeVille, 2003-2005 Cadillac Escalade, 2003-2006 Cadillac Escalade ESV, 2003-2006 Cadillac Escalade EXT, 2004-2005 Cadillac CTS, 2006-2006 Cadillac Escalade
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Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
15895, 12561777, 12567163, 19209807, 19209808, 12559849, 12567497, 12559848,
...View moreitem #1002E8ET
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Spectra PremiumPart # OS5201
Spectra Premium OS5201 Oxygen Sensor
4.45 Reviews
$25.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2004 Buick Rainier, 2008-2008 Buick Lucerne, 2003-2003 Chevrolet Trailblazer EXT, 2003-2004 Chevrolet SSR, 2004-2004 Chevrolet Trailblazer EXT, 2003-2004 GMC Envoy XL, 2004-2004 GMC Envoy XUV, 2003-2003 Isuzu Ascender, 2004-2004 Isuzu Ascender
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Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
OS5201, 752535, 754063, SG720T, SG720, 2131528, 21048, 8125671630,
...View moreitem #1000YKEA
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DensoPart # 234-4119
Oxygen Sensor - Upstream - Denso 234-4119
4.29 Reviews
$64.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Buick Rainier, 2004-2005 Chevrolet Colorado, 2004-2005 Chevrolet Trailblazer, 2004-2005 Chevrolet Trailblazer EXT, 2004-2004 GMC Envoy, 2004-2005 GMC Canyon, 2004-2005 GMC Envoy XL, 2004-2005 GMC Envoy XUV, 2005-2005 GMC Envoy, 2004-2005 Isuzu Ascender, 2004-2004 Oldsmobile Bravada, 2005-2005 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
234-4119, 21054, 8125869960, 12586996, 213-1698, 213-1570, OS2242, OS2247,
...View moreitem #1004YZEE
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Spectra PremiumPart # OS5199
Spectra Premium OS5199 Oxygen Sensor, Downstream
4.45 Reviews
$34.99
Low stock: Only 4 left
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Buick Rainier, 2002-2002 Chevrolet Trailblazer EXT, 2002-2005 Chevrolet Trailblazer, 2003-2005 Chevrolet Trailblazer EXT, 2004-2005 Chevrolet Classic, 2004-2005 Chevrolet Colorado, 2004-2005 Chevrolet Malibu, 2006-2007 Chevrolet Malibu, 2008-2008 Chevrolet Malibu, 2002-2002 GMC Envoy XL, 2002-2004 GMC Envoy, 2003-2005 GMC Envoy XL, 2004-2005 GMC Canyon, 2004-2005 GMC Envoy XUV, 2005-2005 GMC Envoy, 2003-2005 Isuzu Ascender, 2002-2004 Oldsmobile Bravada, 2006-2007 Pontiac G6, 2005-2005 Saab 9-7x
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Vehicle: GMC Envoy XUV
Quantity1
Installation PositionDownstream
Item LocatedUnited States
Part interchange
OS5199, 752262, 753027, 753710, 753606, 754055, SG1412, SG1619,
...View moreitem #1000YK9U
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BoschPart # 13847
Bosch 13847 Oxygen Sensor, Upstream
46 Reviews
$69.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Buick Rainier, 2004-2005 Chevrolet Trailblazer, 2004-2005 Chevrolet Trailblazer EXT, 2004-2004 GMC Envoy, 2004-2005 GMC Envoy XL, 2004-2005 GMC Envoy XUV, 2005-2005 GMC Envoy, 2004-2005 Isuzu Ascender, 2004-2004 Oldsmobile Bravada, 2005-2005 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
13847, 12586996, 8125869960
item #1002D8X5
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DensoPart # 234-4285
Denso 234-4285 Oxygen Sensor
4.29 Reviews
$43.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Buick Rainier, 2006-2006 Buick Rainier, 2002-2002 Chevrolet Trailblazer EXT, 2002-2005 Chevrolet Trailblazer, 2003-2003 Chevrolet Express 1500, 2003-2003 Chevrolet Express 2500, 2003-2003 Chevrolet Express 3500, 2003-2005 Chevrolet Trailblazer EXT, 2004-2004 Chevrolet Express 1500, 2004-2004 Chevrolet Express 2500, 2004-2004 Chevrolet Express 2500, 2004-2004 Chevrolet Express 2500, 2004-2004 Chevrolet Express 3500, 2004-2005 Chevrolet Colorado, 2004-2005 Chevrolet Malibu, 2005-2005 Chevrolet Express 2500, 2005-2006 Chevrolet Express 1500, 2005-2006 Chevrolet Express 3500, 2005-2006 Chevrolet Express 3500, 2006-2006 Chevrolet Express 2500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
234-4285, 21044, 21545, 8192098050, 8125786240, 8245773030, 12578624, 19209805,
...View moreitem #1004Z6D7
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Spectra PremiumPart # OS6048
Spectra Premium OS6048 Oxygen Sensor
4.45 Reviews
$42.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2004 Buick Rainier, 2003-2003 Chevrolet SSR, 2003-2003 Chevrolet Trailblazer EXT, 2004-2004 Chevrolet SSR, 2004-2004 Chevrolet Trailblazer EXT, 2003-2004 GMC Envoy XL, 2004-2004 GMC Envoy XUV, 2003-2004 Isuzu Ascender
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Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
OS6048, 752534, 753485, SG721, 2131527, 21047, 8125671270, ES20095,
...View moreitem #1000YNG4
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Spectra PremiumPart # OS5062
Spectra Premium OS5062 Oxygen Sensor, Upstream
4.45 Reviews
$31.99
Low stock: Only 4 left
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Buick Rainier, 2004-2005 Chevrolet Colorado, 2004-2005 Chevrolet Trailblazer, 2004-2005 Chevrolet Trailblazer EXT, 2004-2004 GMC Envoy, 2004-2005 GMC Canyon, 2004-2005 GMC Envoy XL, 2004-2005 GMC Envoy XUV, 2005-2005 GMC Envoy, 2004-2005 Isuzu Ascender, 2004-2004 Oldsmobile Bravada, 2005-2005 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
OS5062, 753029, 753389, 753483, SG1414T, SG1409T, SG1414, SG1409,
...View moreitem #1000YNKQ
Show less
DensoPart # 234-4647
Denso 234-4647 Oxygen Sensor
4.29 Reviews
$45.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2004 Buick Rainier, 2004-2004 Buick Regal, 2004-2005 Buick LeSabre, 2004-2005 Buick Park Avenue, 2005-2005 Buick Century, 2005-2005 Buick Rendezvous, 2005-2007 Buick Allure, 2005-2007 Buick LaCrosse, 2005-2007 Buick Terraza, 2006-2006 Buick Rendezvous, 2006-2008 Buick Lucerne, 2007-2007 Buick Rendezvous, 2000-2002 Chevrolet Astro, 2003-2004 Chevrolet SSR, 2003-2004 Chevrolet Trailblazer EXT, 2004-2004 Chevrolet Impala, 2004-2004 Chevrolet Monte Carlo, 2005-2005 Chevrolet Venture, 2005-2007 Chevrolet Corvette, 2005-2007 Chevrolet Equinox
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
234-4647, 21048, 8125671630, OS2132, OS2008, OS2012, OS1473, OS2011,
...View moreitem #1005HR4K
Show less
Spectra PremiumPart # OS5210
Spectra Premium OS5210 Oxygen Sensor
4.45 Reviews
$32.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2004 Buick Regal, 2004-2005 Buick LeSabre, 2004-2005 Buick Park Avenue, 2005-2005 Buick Century, 2005-2005 Buick Rainier, 2005-2005 Buick Rendezvous, 2005-2007 Buick Allure, 2005-2007 Buick LaCrosse, 2005-2007 Buick Terraza, 2006-2006 Buick Rendezvous, 2006-2007 Buick Lucerne, 2007-2007 Buick Rendezvous, 2000-2002 Chevrolet Astro, 2004-2004 Chevrolet Impala, 2004-2004 Chevrolet Monte Carlo, 2005-2005 Chevrolet SSR, 2005-2005 Chevrolet Trailblazer EXT, 2005-2005 Chevrolet Venture, 2005-2007 Chevrolet Corvette, 2005-2007 Chevrolet Equinox
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
OS5210, 213818, 213816, 213800, 2131552, 21573, 8192098080, 8125731680,
...View moreitem #1000YKKC
Show less
DensoPart # 234-4212
Denso 234-4212 Oxygen Sensor
4.29 Reviews
$58.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2005-2005 Buick Rainier, 2005-2007 Buick Terraza, 2005-2009 Buick Allure, 2005-2009 Buick LaCrosse, 2006-2006 Buick Rendezvous, 2007-2007 Buick Rendezvous, 2007-2008 Buick Lucerne, 2008-2008 Buick Enclave, 2009-2011 Buick Lucerne, 2010-2010 Buick Allure, 2010-2013 Buick LaCrosse, 2011-2013 Buick Regal, 2012-2017 Buick Verano, 2014-2017 Buick Regal, 2015-2015 Buick LaCrosse, 2003-2003 Cadillac Escalade, 2003-2003 Cadillac Escalade, 2003-2006 Cadillac Escalade ESV, 2003-2006 Cadillac Escalade EXT, 2004-2004 Cadillac Seville
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Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
234-4212, 13383, 13598, 13687, 15718, 15155, 15114, 15133,
...View moreitem #1004YY59
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DensoPart # 234-4651
Denso 234-4651 Oxygen Sensor
4.29 Reviews
$52.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2005-2005 Buick Rainier, 2000-2003 Cadillac DeVille, 2001-2002 Cadillac Eldorado, 2001-2003 Cadillac Seville, 2003-2003 Cadillac Escalade ESV, 2003-2005 Cadillac Escalade, 2003-2006 Cadillac Escalade EXT, 2004-2005 Cadillac CTS, 2004-2006 Cadillac Escalade ESV, 2006-2006 Cadillac Escalade, 2007-2007 Cadillac CTS, 2002-2002 Chevrolet Suburban 2500, 2002-2003 Chevrolet Silverado 1500 HD, 2002-2004 Chevrolet Silverado 2500, 2002-2006 Chevrolet Silverado 2500 HD, 2002-2006 Chevrolet Silverado 3500, 2003-2003 Chevrolet Express 1500, 2003-2003 Chevrolet Express 1500, 2003-2003 Chevrolet Express 2500, 2003-2003 Chevrolet Express 2500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
234-4651, 21573, 21514, 21048, 12573168, 8192098080, OS2258, OS2217,
...View moreitem #1005HQTC
Show less
DensoPart # 234-4668
Denso 234-4668 Oxygen Sensor
4.29 Reviews
$43.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2005-2005 Buick Rainier, 2005-2007 Buick Terraza, 2005-2009 Buick Allure, 2005-2009 Buick LaCrosse, 2006-2006 Buick Rendezvous, 2007-2007 Buick Rendezvous, 2007-2008 Buick Lucerne, 2008-2008 Buick Enclave, 2009-2011 Buick Lucerne, 2003-2003 Cadillac Escalade, 2004-2004 Cadillac Seville, 2004-2005 Cadillac CTS, 2004-2005 Cadillac DeVille, 2004-2005 Cadillac Escalade, 2008-2013 Cadillac Escalade EXT, 2008-2014 Cadillac Escalade, 2008-2014 Cadillac Escalade ESV, 2009-2015 Cadillac CTS, 2003-2003 Chevrolet Suburban 1500, 2003-2003 Chevrolet Tahoe
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
234-4668, 21546, 8125731670, OS2249, OS2239, OS1656, OS2240, 213-1699,
...View moreitem #1005HQWW
Show less
DensoPart # 234-4650
Denso 234-4650 Oxygen Sensor
4.29 Reviews
$50.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2001-2004 Buick Century, 2002-2003 Buick Rendezvous, 2004-2004 Buick Rainier, 2004-2004 Buick Rendezvous, 2000-2003 Cadillac DeVille, 2001-2002 Cadillac Eldorado, 2001-2003 Cadillac Seville, 2002-2002 Cadillac Escalade, 2000-2000 Chevrolet Astro, 2000-2000 Chevrolet Silverado 2500, 2000-2000 Chevrolet Tahoe, 2000-2000 Chevrolet Tahoe, 2000-2002 Chevrolet Silverado 1500, 2000-2002 Chevrolet Silverado 1500, 2000-2002 Chevrolet Suburban 1500, 2001-2001 Chevrolet Tahoe, 2001-2002 Chevrolet Astro, 2001-2003 Chevrolet Malibu, 2001-2004 Chevrolet Impala, 2001-2004 Chevrolet Monte Carlo
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
234-4650, 8972873520, 21047, 21516, 8125671270, 213-819, 213-817, 213-802,
...View moreitem #1005HQQS
Show less
A-Premium®Part # APOS1942
2004 GMC Envoy XUV Upstream & Downstream O2 Oxygen Sensor Kit | 4-Pc Direct-Fit | Heated | A-Premium APOS1942
4.5599 Reviews
$100.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004 GMC Envoy XUV
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity4
Installation PositionUpstream & Downstream
Item LocatedUnited States
Part interchange
12561776, 12562943, 12574924, 250-24836, 250-24269
item #10049Y3S
Show less
DelphiPart # ES20113
Oxygen Sensor - Rear Side - Delphi ES20113
4.539 Reviews
$64.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Buick Rainier, 2006-2006 Buick Rainier, 2012-2013 Buick Enclave, 2014-2014 Buick Enclave, 2015-2017 Buick Enclave, 2005-2005 Cadillac STS, 2005-2006 Cadillac SRX, 2005-2007 Cadillac CTS, 2005-2007 Cadillac CTS, 2006-2006 Cadillac STS, 2006-2007 Cadillac STS, 2007-2009 Cadillac SRX, 2008-2008 Cadillac CTS, 2008-2010 Cadillac STS, 2009-2010 Cadillac CTS, 2010-2010 Cadillac CTS, 2010-2010 Cadillac CTS, 2011-2011 Cadillac STS, 2011-2013 Cadillac CTS, 2011-2014 Cadillac CTS
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Installation PositionRear
Item LocatedUnited States
Part interchange
ES20113, 5S10069, 5S10170, 5S4283, 5S4400, 5S5710, 5S8136, 5S8139,
...View moreitem #1001X7SE
Show less
DensoPart # 234-4209
Denso 234-4209 Oxygen Sensor
4.29 Reviews
$54.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1991-1994 Acura NSX, 1991-1995 Acura Legend, 1992-1994 Acura Vigor, 1992-1997 Acura Integra, 1995-1995 Acura NSX, 1995-2003 Acura TL, 1996-1996 Acura NSX, 1996-1997 Acura RL, 1997-1998 Acura EL, 1997-1999 Acura CL, 1997-1999 Acura NSX, 1997-1999 Acura NSX, 1998-1998 Acura Integra, 1998-1999 Acura RL, 1999-1999 Acura Integra, 1999-2005 Acura EL, 1999-2005 Acura NSX, 2000-2000 Acura Integra, 2000-2002 Acura RL, 2001-2001 Acura Integra
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
234-4209, 13073, 13139, 15349, 13302, 15621, 15580, 13619,
...View moreitem #1004Z0RS
Show less
Walker ProductsPart # 250-24836
Walker Products 250-24836 Oxygen Sensor
55 Reviews
$51.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2004 Buick Rainier, 2004-2004 Buick Regal, 2004-2005 Buick LeSabre, 2004-2005 Buick Park Avenue, 2005-2005 Buick Century, 2005-2005 Buick Rainier, 2005-2005 Buick Rendezvous, 2005-2007 Buick Allure, 2005-2007 Buick LaCrosse, 2005-2007 Buick Terraza, 2006-2006 Buick Rendezvous, 2006-2008 Buick Lucerne, 2007-2007 Buick Rendezvous, 2000-2002 Chevrolet Astro, 2003-2004 Chevrolet SSR, 2003-2004 Chevrolet Trailblazer EXT, 2004-2004 Chevrolet Impala, 2004-2004 Chevrolet Monte Carlo, 2005-2005 Chevrolet Corvette, 2005-2005 Chevrolet Impala
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC Envoy XUV
Quantity1
Item LocatedUnited States
Part interchange
250-24836
item #1001P8K3
Show less
Your vehicle’s oxygen sensor (also known as O2 sensors) plays a critical role in engine performance, fuel efficiency, and emissions control. By continuously measuring the amount of unburned oxygen in the exhaust, the oxygen sensor sends real-time feedback to your engine control unit (ECU), ensuring the perfect air-fuel mixture.
When an oxygen sensor fails, your engine essentially runs “blind,” leading to poor fuel economy, rough idling, reduced performance, and a persistent check engine light. A timely front oxygen sensor replacement or replacement of a faulty upstream oxygen sensor or downstream oxygen sensor can restore optimal driving conditions and help you pass emissions tests with ease.
Why Choose A-Premium Oxygen Sensors?
Unlike universal parts that require cutting and splicing wires, A-Premium O2 sensors are engineered for direct plug-and-play installation.
- OEM-style connectors for seamless fit
- Pre-coated anti-seize threads for easy installation
- Laser-welded body construction for durability
- High-temperature sintered coating for long service life
- Premium insulation sheathing and impact-resistant design
- Slotted guard tube for sensor protection
- High heat dissipation structure for extreme environments
Advanced Performance & Precision
A-Premium oxygen sensor technology ensures fast, accurate, and stable performance:
Performance & Response
- ≤200ms fast response time
- High-efficiency oxygen sensing
- Zirconia sensing element
- Real-time signal feedback
Precision & Control
- Real-time exhaust tracking
- Accurate combustion control
- Stable signal output
Efficiency & Engine Benefits
- Improved fuel efficiency
- Enhanced engine performance
- Reduced harmful emissions
- Extended engine lifespan
Environmental Adaptability
- Operating range: -40°F to 266°F
- Air-tight sealing design
- Stable performance under harsh conditions
3 Symptoms of a Bad Oxygen Sensor
Because O2 sensors operate in extreme heat and carbon-rich environments, they naturally degrade over time.
- Check Engine Light (CEL): Common codes include P0135, P0171, and P0420. These often point to issues with an upstream oxygen sensor or oxygen sensor bank 1.
- Poor Fuel Economy: A faulty oxygen sensor may cause a rich fuel mixture, dramatically lowering MPG. 20-40% worse fuel economy overnight.
- Rough Idle & Stalling: Incorrect readings from your downstream oxygen sensor or upstream sensor can disrupt engine stability.
- Rotten egg smell: Catalytic converter overheating from bad fuel mixture
Understanding O2 Sensor Positions: Upstream vs Downstream
Modern vehicles may have multiple oxygen sensor units, making it essential to identify the correct one:
- Oxygen Sensor Bank 1vs Bank 2
- oxygen sensor bank 1 refers to the side of the engine with Cylinder #1
- Bank 2 is the opposite side
- Upstream Oxygen Sensor(Sensor 1)
- Located before the catalytic converter
- Controls air-fuel ratio
- Most common need for front oxygen sensor replacement
- Downstream Oxygen Sensor(Sensor 2)
- Located after the catalytic converter
- Monitors emissions system efficiency
Tip: Always match your diagnostic code to the correct upstream oxygen sensor or downstream oxygen sensor before purchasing.
Complete Your Emissions Repair
Replacing your oxygen sensor is often part of a larger emissions system fix. Consider inspecting these related components:
- Catalytic Converter: Persistent issues after replacing a downstream oxygen sensor may indicate converter failure
- MAF Sensor: Works with your oxygen sensor to calculate air intake
- Ignition Coils & Spark Plugs: Misfires can damage O2 sensors quickly
Shop by Popular Makes
To help you quickly find the right oxygen sensor, explore our most popular vehicle-specific options:
Browse our most searched and best-selling vehicle-specific oxygen sensor options to quickly locate the right fit for your car.
Frequently Asked Questions
Can I clean my oxygen sensor instead of replacing it?
Should I replace O2 sensors in pairs?
Do I need a special tool?
How long do oxygen sensors last?
What’s the difference between upstream and downstream sensors?
What happens if I ignore a bad oxygen sensor?
How do I know if it’s Bank 1 or Bank 2?
Will replacing an oxygen sensor improve MPG?
How do oxygen sensor voltages relate to fuel mixture?
How much does it cost to replace an oxygen sensor?
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How Much Does It Cost to Replace the Oxygen Sensor?
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What Is an Oxygen Sensor?
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